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path: root/widgets/table/e-cell-text.c
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * e-cell-text.c: Text cell renderer.
 * Copyright 1999, 2000, 2001, Ximian, Inc.
 *
 * Authors:
 *   Miguel de Icaza <miguel@ximian.com>
 *          Chris Lahey <clahey@ximian.com>
 *
 * A lot of code taken from:
 *
 * Text item type for GnomeCanvas widget
 *
 * GnomeCanvas is basically a port of the Tk toolkit's most excellent
 * canvas widget.  Tk is copyrighted by the Regents of the University
 * of California, Sun Microsystems, and other parties.
 *
 * Copyright (C) 1998 The Free Software Foundation
 *
 * Author: Federico Mena <federico@nuclecu.unam.mx>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License, version 2, as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */

#include <config.h>

#include <stdio.h>
#include <ctype.h>
#include <math.h>
#include <string.h>

#include <gdk/gdkkeysyms.h>
#include <gtk/gtk.h>
#include <libgnomecanvas/gnome-canvas.h>
#include <libgnomecanvas/gnome-canvas-rect-ellipse.h>

#include "a11y/e-table/gal-a11y-e-cell-registry.h"
#include "a11y/e-table/gal-a11y-e-cell-text.h"
#include "text/e-text.h"
#include <glib/gi18n.h>
#include "e-util/e-text-event-processor.h"
#include "e-util/e-text-event-processor-emacs-like.h"
#include "e-util/e-util.h"
#include "misc/e-canvas.h"
#include "misc/e-unicode.h"

#include "e-cell-text.h"
#include "e-table-item.h"
#include "e-table-tooltip.h"
#define d(x)
#define DO_SELECTION 1
#define VIEW_TO_CELL(view) E_CELL_TEXT (((ECellView *)view)->ecell)

#if d(!)0
#define e_table_item_leave_edit_(x) (e_table_item_leave_edit((x)), g_print ("%s: e_table_item_leave_edit\n", __FUNCTION__))
#else
#define e_table_item_leave_edit_(x) (e_table_item_leave_edit((x)))
#endif

#define ECT_CLASS(c) (E_CELL_TEXT_CLASS(GTK_OBJECT_GET_CLASS ((c))))

/* This defines a line of text */
struct line {
    char *text; /* Line's text UTF-8, it is a pointer into the text->text string */
    int length; /* Line's length in BYTES */
    int width;  /* Line's width in pixels */
    int ellipsis_length;  /* Length before adding ellipsis in BYTES */
};

/* Object argument IDs */
enum {
    PROP_0,

    PROP_STRIKEOUT_COLUMN,
    PROP_UNDERLINE_COLUMN,
    PROP_BOLD_COLUMN,
    PROP_COLOR_COLUMN,
    PROP_EDITABLE,
    PROP_BG_COLOR_COLUMN
};


enum {
    E_SELECTION_PRIMARY,
    E_SELECTION_CLIPBOARD
};

/* signals */
enum {
    TEXT_INSERTED,
    TEXT_DELETED,
    LAST_SIGNAL
};

static guint signals [LAST_SIGNAL] = { 0 };

static GdkAtom clipboard_atom = GDK_NONE;

#define PARENT_TYPE e_cell_get_type ()

#define UTF8_ATOM  gdk_atom_intern ("UTF8_STRING", FALSE)

#define TEXT_PAD 4

typedef struct {
    gpointer lines;         /* Text split into lines (private field) */
    int num_lines;          /* Number of lines of text */
    int max_width;
    int ref_count;
} ECellTextLineBreaks;
    

typedef struct _CellEdit CellEdit;

typedef struct {
    ECellView    cell_view;
    GdkGC       *gc;
    GdkCursor *i_cursor;
    GdkBitmap *stipple;     /* Stipple for text */
    
    GnomeCanvas *canvas;

    /*
     * During editing.
     */
    CellEdit    *edit;


    int xofs, yofs;                 /* This gets added to the x
                                           and y for the cell text. */
    double ellipsis_width[2];      /* The width of the ellipsis. */
} ECellTextView;

struct _CellEdit {

    ECellTextView *text_view;

    int model_col, view_col, row;
    int cell_width;

    PangoLayout *layout;

    char *text;

    char         *old_text;

    /*
     * Where the editing is taking place
     */

    int xofs_edit, yofs_edit;       /* Offset because of editing.
                                           This is negative compared
                                           to the other offsets. */

    /* This needs to be reworked a bit once we get line wrapping. */
    int selection_start;            /* Start of selection - IN BYTES */
    int selection_end;              /* End of selection - IN BYTES */
    gboolean select_by_word;        /* Current selection is by word */

    /* This section is for drag scrolling and blinking cursor. */
    /* Cursor handling. */
    gint timeout_id;                /* Current timeout id for scrolling */
    GTimer *timer;                  /* Timer for blinking cursor and scrolling */

    gint lastx, lasty;              /* Last x and y motion events */
    gint last_state;                /* Last state */
    gulong scroll_start;            /* Starting time for scroll (microseconds) */

    gint show_cursor;               /* Is cursor currently shown */
    gboolean button_down;           /* Is mouse button 1 down */

    ETextEventProcessor *tep;       /* Text Event Processor */

    gboolean has_selection;         /* TRUE if we have the selection */

    guint pointer_in : 1;
    guint default_cursor_shown : 1;
    GtkIMContext *im_context;
    gboolean need_im_reset;
    gboolean im_context_signals_registered;

    guint16 preedit_length;       /* length of preedit string, in bytes */

    ECellActions actions;
};

static void e_cell_text_view_command (ETextEventProcessor *tep, ETextEventProcessorCommand *command, gpointer data);

static void e_cell_text_view_get_selection (CellEdit *edit, GdkAtom selection, guint32 time);
static void e_cell_text_view_supply_selection (CellEdit *edit, guint time, GdkAtom selection, char *data, gint length);

static void _get_tep (CellEdit *edit);

static gint get_position_from_xy (CellEdit *edit, gint x, gint y);
static gboolean _blink_scroll_timeout (gpointer data);

static void ect_free_color (gchar *color_spec, GdkColor *color, GdkColormap *colormap);
static GdkColor* e_cell_text_get_color (ECellTextView *cell_view, gchar *color_spec);
static void e_cell_text_preedit_changed_cb (GtkIMContext *context, ECellTextView *text_view);
static void e_cell_text_commit_cb (GtkIMContext *context, const gchar  *str, ECellTextView *text_view);
static gboolean e_cell_text_retrieve_surrounding_cb (GtkIMContext *context, ECellTextView *text_view);
static gboolean e_cell_text_delete_surrounding_cb   (GtkIMContext *context, gint          offset, gint          n_chars, ECellTextView        *text_view);
static void _insert (ECellTextView *text_view, char *string, int value);
static void _delete_selection (ECellTextView *text_view);
static PangoAttrList* build_attr_list (ECellTextView *text_view, int row, int text_length);

static ECellClass *parent_class;

char *
e_cell_text_get_text (ECellText *cell, ETableModel *model, int col, int row)
{
    if (ECT_CLASS(cell)->get_text)
        return ECT_CLASS(cell)->get_text (cell, model, col, row);
    else
        return NULL;
}

void
e_cell_text_free_text (ECellText *cell, char *text)
{
    if (ECT_CLASS(cell)->free_text)
        ECT_CLASS(cell)->free_text (cell, text);
}

void
e_cell_text_set_value (ECellText *cell, ETableModel *model, int col, int row,
               const char *text)
{
    if (ECT_CLASS(cell)->set_value)
        ECT_CLASS(cell)->set_value (cell, model, col, row, text);
}

static char *
ect_real_get_text (ECellText *cell, ETableModel *model, int col, int row)
{
    return e_table_model_value_at(model, col, row);
}

static void
ect_real_free_text (ECellText *cell, char *text)
{
}

/* This is the default method for setting the ETableModel value based on
   the text in the ECellText. This simply uses the text as it is - it assumes
   the value in the model is a char*. Subclasses may parse the text into
   data structures to pass to the model. */
static void
ect_real_set_value (ECellText *cell, ETableModel *model, int col, int row,
            const char *text)
{
    e_table_model_set_value_at (model, col, row, text);
}

static void
ect_queue_redraw (ECellTextView *text_view, int view_col, int view_row)
{
    e_table_item_redraw_range (
        text_view->cell_view.e_table_item_view,
        view_col, view_row, view_col, view_row);
}

/*
 * Shuts down the editing process
 */
static void
ect_stop_editing (ECellTextView *text_view, gboolean commit)
{
    CellEdit *edit = text_view->edit;
    int row, view_col, model_col;
    char *old_text, *text;

    if (!edit)
        return;

    row = edit->row;
    view_col = edit->view_col;
    model_col = edit->model_col;
    
    old_text = edit->old_text;
    text = edit->text;
    if (edit->tep)
        g_object_unref (edit->tep);
    if (! edit->default_cursor_shown){
        gdk_window_set_cursor (GTK_WIDGET(text_view->canvas)->window, NULL);
        edit->default_cursor_shown = TRUE;
    }
    if (edit->timeout_id) {
        g_source_remove (edit->timeout_id);
        edit->timeout_id = 0;
    }
    if (edit->timer) {
        g_timer_stop (edit->timer);
        g_timer_destroy (edit->timer);
        edit->timer = NULL;
    }
    
    g_signal_handlers_disconnect_matched (
        edit->im_context,
        G_SIGNAL_MATCH_DATA, 0, 0,
        NULL, NULL, text_view);

    if (edit->layout)
        g_object_unref (edit->layout);

    g_free (edit);

    text_view->edit = NULL;
    if (commit) {
        /*
         * Accept the currently edited text.  if it's the same as what's in the cell, do nothing.
         */
        ECellView *ecell_view = (ECellView *) text_view;
        ECellText *ect = (ECellText *) ecell_view->ecell;

        if (strcmp (old_text, text)) {
            e_cell_text_set_value (ect, ecell_view->e_table_model,
                           model_col, row, text);
        }
    }
    g_free (text);
    g_free (old_text);

    ect_queue_redraw (text_view, view_col, row);
}

/*
 * Cancels the edits
 */
static void
ect_cancel_edit (ECellTextView *text_view)
{
    ect_stop_editing (text_view, FALSE);
    e_table_item_leave_edit_ (text_view->cell_view.e_table_item_view);
}

/*
 * ECell::new_view method
 */
static ECellView *
ect_new_view (ECell *ecell, ETableModel *table_model, void *e_table_item_view)
{
    ECellTextView *text_view = g_new0 (ECellTextView, 1);
    GnomeCanvas *canvas = GNOME_CANVAS_ITEM (e_table_item_view)->canvas;
    
    text_view->cell_view.ecell = ecell;
    text_view->cell_view.e_table_model = table_model;
    text_view->cell_view.e_table_item_view = e_table_item_view;
    text_view->cell_view.kill_view_cb = NULL;
        text_view->cell_view.kill_view_cb_data = NULL;
    

    text_view->canvas = canvas;

    text_view->xofs = 0.0;
    text_view->yofs = 0.0;

       
    return (ECellView *)text_view;
}

/*
 * ECell::kill_view method
 */
static void
ect_kill_view (ECellView *ecv)
{
    ECellTextView *text_view = (ECellTextView *) ecv;

    if (text_view->cell_view.kill_view_cb)
            (text_view->cell_view.kill_view_cb)(ecv, text_view->cell_view.kill_view_cb_data);

    if (text_view->cell_view.kill_view_cb_data)
        g_list_free(text_view->cell_view.kill_view_cb_data);

    g_free (text_view);
}

/*
 * ECell::realize method
 */
static void
ect_realize (ECellView *ecell_view)
{
    ECellTextView *text_view = (ECellTextView *) ecell_view;
    
    text_view->gc = gdk_gc_new (GTK_WIDGET (text_view->canvas)->window);

    text_view->i_cursor = gdk_cursor_new (GDK_XTERM);
    
    if (parent_class->realize)
        (* parent_class->realize) (ecell_view);
}

/*
 * ECell::unrealize method
 */
static void
ect_unrealize (ECellView *ecv)
{
    ECellTextView *text_view = (ECellTextView *) ecv;
    ECellText *ect = (ECellText*) ecv->ecell;
    GdkColormap *colormap;

    g_object_unref (text_view->gc);
    text_view->gc = NULL;

    if (text_view->edit){
        ect_cancel_edit (text_view);
    }

    if (text_view->stipple)
        g_object_unref (text_view->stipple);

    gdk_cursor_unref (text_view->i_cursor);

    if (ect->colors) {
        colormap = gtk_widget_get_colormap (GTK_WIDGET (text_view->canvas));
        g_hash_table_foreach (ect->colors, (GHFunc) ect_free_color,
                      colormap);
        g_hash_table_destroy (ect->colors);
        ect->colors = NULL;
    }

    if (parent_class->unrealize)
        (* parent_class->unrealize) (ecv);

}

static void
ect_free_color (gchar *color_spec, GdkColor *color, GdkColormap *colormap)
{
    g_free (color_spec);

    /* This frees the color. Note we don't free it if it is the special
       value. */
    if (color != (GdkColor*) 1) {
        gdk_colormap_free_colors (colormap, color, 1);

        /* This frees the memory for the GdkColor. */
        gdk_color_free (color);
    }
}


static PangoAttrList*
build_attr_list (ECellTextView *text_view, int row, int text_length) 
{

    ECellView *ecell_view = (ECellView *) text_view;
    ECellText *ect = E_CELL_TEXT (ecell_view->ecell);
    PangoAttrList *attrs = pango_attr_list_new ();
    gboolean bold, strikeout, underline;

    bold = ect->bold_column >= 0 &&
        row >= 0 &&
        e_table_model_value_at(ecell_view->e_table_model, ect->bold_column, row);
    strikeout = ect->strikeout_column >= 0 &&
        row >= 0 &&
        e_table_model_value_at(ecell_view->e_table_model, ect->strikeout_column, row);
    underline = ect->underline_column >= 0 &&
        row >= 0 &&
        e_table_model_value_at(ecell_view->e_table_model, ect->underline_column, row);

    if (bold || strikeout || underline) {
        if (bold) {
            PangoAttribute *attr = pango_attr_weight_new (PANGO_WEIGHT_BOLD);
            attr->start_index = 0;
            attr->end_index = text_length;

            pango_attr_list_insert_before (attrs, attr);
        }
        if (strikeout) {
            PangoAttribute *attr = pango_attr_strikethrough_new (TRUE);
            attr->start_index = 0;
            attr->end_index = text_length;

            pango_attr_list_insert_before (attrs, attr);
        }
        if (underline) {
            PangoAttribute *attr = pango_attr_underline_new (TRUE);
            attr->start_index = 0;
            attr->end_index = text_length;

            pango_attr_list_insert_before (attrs, attr);
        }
    }
    return attrs;
}

static PangoLayout *
layout_with_preedit (ECellTextView *text_view, int row, const char *text, gint width)
{
    CellEdit *edit = text_view->edit;
    PangoAttrList *attrs ;
    PangoLayout *layout;
    GString *tmp_string = g_string_new (NULL);
    PangoAttrList *preedit_attrs = NULL;
    gchar *preedit_string = NULL;
    gint preedit_length = 0;
    gint text_length = strlen (text);
    gint mlen = MIN(edit->selection_start,text_length);
    

    gtk_im_context_get_preedit_string (edit->im_context,
                    &preedit_string,&preedit_attrs,
                    NULL);
    preedit_length = edit->preedit_length = strlen (preedit_string);;

    layout = edit->layout;

    g_string_prepend_len (tmp_string, text,text_length); 

    if (preedit_length) {
        
        /* mlen is the text_length in bytes, not chars
         * check whether we are not inserting into
         * the middle of a utf8 character
         */

        if (mlen < text_length) {
            if (!g_utf8_validate (text+mlen, -1, NULL)) {
                gchar *tc;
                tc = g_utf8_find_next_char (text+mlen,NULL);
                if (tc) {
                    mlen = (gint) (tc - text);
                }
            }
        }

        g_string_insert (tmp_string, mlen, preedit_string);
    } 

    pango_layout_set_text (layout, tmp_string->str, tmp_string->len);

    attrs = (PangoAttrList *) build_attr_list (text_view, row, text_length);

    if (preedit_length)
        pango_attr_list_splice (attrs, preedit_attrs, mlen, preedit_length);
    pango_layout_set_attributes (layout, attrs);
    g_string_free (tmp_string, TRUE);
    if (preedit_string)
        g_free (preedit_string);
    if (preedit_attrs)
        pango_attr_list_unref (preedit_attrs);
    pango_attr_list_unref (attrs);
    return layout;
}

static PangoLayout *
build_layout (ECellTextView *text_view, int row, const char *text, gint width)
{
    ECellView *ecell_view = (ECellView *) text_view;
    ECellText *ect = E_CELL_TEXT (ecell_view->ecell);
    PangoAttrList *attrs ;
    PangoLayout *layout;
    PangoContext *context;
    cairo_font_options_t *font_options;

    layout = gtk_widget_create_pango_layout (GTK_WIDGET (((GnomeCanvasItem *)ecell_view->e_table_item_view)->canvas), text);

    attrs = (PangoAttrList *) build_attr_list (text_view, row, text ? strlen (text) : 0);

    pango_layout_set_attributes (layout, attrs);
    pango_attr_list_unref (attrs);

    if (text_view->edit || width <= 0)
        return layout;

    context = pango_layout_get_context (layout);

    font_options = get_font_options();
    pango_cairo_context_set_font_options (context, font_options);
    cairo_font_options_destroy (font_options);
    pango_layout_context_changed (layout);

    if (ect->font_name)
    {
        PangoFontDescription *desc = NULL, *fixed_desc = NULL;
        char *fixed_family = NULL;
        gint fixed_size = 0;
        
        fixed_desc = pango_font_description_from_string (ect->font_name);
        if (fixed_desc) {
            fixed_family = (char *)pango_font_description_get_family (fixed_desc);
            fixed_size = pango_font_description_get_size (fixed_desc);
        } 
        
        desc = pango_font_description_copy (gtk_widget_get_style (GTK_WIDGET (((GnomeCanvasItem *)ecell_view->e_table_item_view)->canvas))->font_desc);
        pango_font_description_set_family (desc, fixed_family);
        pango_font_description_set_size (desc, fixed_size);
/*          pango_font_description_set_style (desc, PANGO_STYLE_OBLIQUE); */
        pango_layout_set_font_description (layout, desc);
        pango_font_description_free (desc);
        pango_font_description_free (fixed_desc);
    }
    
    pango_layout_set_width (layout, width * PANGO_SCALE);
    pango_layout_set_wrap (layout, PANGO_WRAP_CHAR);

    if (pango_layout_get_line_count (layout) > 1) {
        PangoLayoutLine *line = pango_layout_get_line (layout, 0);
        gchar *line_text = g_strdup (pango_layout_get_text (layout));
        gchar *last_char = g_utf8_find_prev_char (line_text, line_text + line->length - 1);
        while (last_char && pango_layout_get_line_count (layout) > 1) {
            gchar *new_text;
            last_char = g_utf8_find_prev_char (line_text, last_char);
            if (last_char)
                *last_char = '\0';
            new_text = g_strconcat (line_text, "...", NULL);
            pango_layout_set_text (layout, new_text, -1);
            g_free (new_text);
        }
        g_free (line_text);
    }

    switch (ect->justify) {
    case GTK_JUSTIFY_RIGHT:
        pango_layout_set_alignment (layout, PANGO_ALIGN_RIGHT);
        break;
    case GTK_JUSTIFY_CENTER:
        pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
        break;
    case GTK_JUSTIFY_LEFT:
    default:
        break;
    }

    return layout;
}

static PangoLayout *
generate_layout (ECellTextView *text_view, int model_col, int view_col, int row, int width)
{
    ECellView *ecell_view = (ECellView *) text_view;
    ECellText *ect = E_CELL_TEXT (ecell_view->ecell);
    PangoLayout *layout;
    CellEdit *edit = text_view->edit;

    if (edit && edit->layout && edit->model_col == model_col && edit->row == row) {
        g_object_ref (edit->layout);
        return edit->layout;
    }

    if (row >= 0) {
        char *temp = e_cell_text_get_text(ect, ecell_view->e_table_model, model_col, row);
        layout = build_layout (text_view, row, temp ? temp : "?", width);
        e_cell_text_free_text(ect, temp);
    } else
        layout = build_layout (text_view, row, "Mumbo Jumbo", width);

    return layout;
}


static void
draw_pango_rectangle (GdkDrawable *drawable, GdkGC *gc, int x1, int y1, PangoRectangle rect)
{
    int width = rect.width / PANGO_SCALE;
    int height = rect.height / PANGO_SCALE;
    if (width <= 0)
        width = 1;
    if (height <= 0)
        height = 1;
    gdk_draw_rectangle (drawable, gc, TRUE,
                x1 + rect.x / PANGO_SCALE, y1 + rect.y / PANGO_SCALE, width, height);
}

static gboolean
show_pango_rectangle (CellEdit *edit, PangoRectangle rect)
{
    int x1 = rect.x / PANGO_SCALE;
    int x2 = (rect.x + rect.width) / PANGO_SCALE;
#if 0
    int y1 = rect.y / PANGO_SCALE;
    int y2 = (rect.y + rect.height) / PANGO_SCALE;
#endif

    int new_xofs_edit = edit->xofs_edit;
    int new_yofs_edit = edit->yofs_edit;

    if (x1 < new_xofs_edit)
        new_xofs_edit = x1;
    if (2 + x2 - edit->cell_width > new_xofs_edit)
        new_xofs_edit = 2 + x2 - edit->cell_width;
    if (new_xofs_edit < 0)
        new_xofs_edit = 0;

#if 0
    if (y1 < new_yofs_edit)
        new_yofs_edit = y1;
    if (2 + y2 - edit->cell_height > new_yofs_edit)
        new_yofs_edit = 2 + y2 - edit->cell_height;
    if (new_yofs_edit < 0)
        new_yofs_edit = 0;
#endif

    if (new_xofs_edit != edit->xofs_edit ||
        new_yofs_edit != edit->yofs_edit) {
        edit->xofs_edit = new_xofs_edit;
        edit->yofs_edit = new_yofs_edit;
        return TRUE;
    }

    return FALSE;
}

/*
 * ECell::draw method
 */
static void
ect_draw (ECellView *ecell_view, GdkDrawable *drawable,
      int model_col, int view_col, int row, ECellFlags flags,
      int x1, int y1, int x2, int y2)
{
    PangoLayout *layout;
    ECellTextView *text_view = (ECellTextView *) ecell_view;
    ECellText *ect = E_CELL_TEXT (ecell_view->ecell);
    CellEdit *edit = text_view->edit;
    gboolean selected;
    GdkColor *foreground;
    GtkWidget *canvas = GTK_WIDGET (text_view->canvas);
    GdkRectangle clip_rect;
    int x_origin, y_origin;

    selected = flags & E_CELL_SELECTED;

    if (selected) {
            foreground = &canvas->style->fg [GTK_STATE_SELECTED];
    } else {
        foreground = &canvas->style->text [GTK_STATE_NORMAL];

        if (ect->color_column != -1) {
            char *color_spec;
            GdkColor *cell_foreground;

            color_spec = e_table_model_value_at (ecell_view->e_table_model,
                                 ect->color_column, row);
            cell_foreground = e_cell_text_get_color (text_view,
                                 color_spec);
            if (cell_foreground)
                foreground = cell_foreground;
        }
    }

    gdk_gc_set_foreground (text_view->gc, foreground);

    x1 += 4;
    y1 += 1;
    x2 -= 4;
    y2 -= 1;

    x_origin = x1 + ect->x + text_view->xofs - (edit ? edit->xofs_edit : 0);
    y_origin = y1 + ect->y + text_view->yofs - (edit ? edit->yofs_edit : 0);

    clip_rect.x = x1;
    clip_rect.y = y1;
    clip_rect.width = x2 - x1;
    clip_rect.height = y2 - y1;

    gdk_gc_set_clip_rectangle (text_view->gc, &clip_rect);
    /*  clip_rect = &rect;*/

    layout = generate_layout (text_view, model_col, view_col, row, x2 - x1);

    if (edit && edit->view_col == view_col && edit->row == row) {
        layout = layout_with_preedit  (text_view, row, edit->text ? edit->text : "?",  x2 - x1);
    } 

    gdk_draw_layout (drawable, text_view->gc,
             x_origin, y_origin,
             layout);

    if (edit && edit->view_col == view_col && edit->row == row) {
        if (edit->selection_start != edit->selection_end) {
            int start_index, end_index;
            PangoLayoutLine *line;
            gint *ranges;
            gint n_ranges, i;
            PangoRectangle logical_rect;
            GdkRegion *clip_region = gdk_region_new ();
            GdkRegion *rect_region;
            GdkGC *selection_gc;
            GdkGC *text_gc;

            start_index = MIN (edit->selection_start, edit->selection_end);
            end_index = edit->selection_start ^ edit->selection_end ^ start_index;

            if (edit->has_selection) {
                selection_gc = canvas->style->base_gc [GTK_STATE_SELECTED];
                text_gc = canvas->style->text_gc[GTK_STATE_SELECTED];
            } else {
                selection_gc = canvas->style->base_gc [GTK_STATE_ACTIVE];
                text_gc = canvas->style->text_gc[GTK_STATE_ACTIVE];
            }

            gdk_gc_set_clip_rectangle (selection_gc, &clip_rect);

            line = pango_layout_get_lines (layout)->data;

            pango_layout_line_get_x_ranges (line, start_index, end_index, &ranges, &n_ranges);

            pango_layout_get_extents (layout, NULL, &logical_rect);

            for (i=0; i < n_ranges; i++) {
                GdkRectangle sel_rect;

                sel_rect.x = x_origin + ranges[2*i] / PANGO_SCALE;
                sel_rect.y = y_origin;
                sel_rect.width = (ranges[2*i + 1] - ranges[2*i]) / PANGO_SCALE;
                sel_rect.height = logical_rect.height / PANGO_SCALE;

                gdk_draw_rectangle (drawable, selection_gc, TRUE,
                            sel_rect.x, sel_rect.y, sel_rect.width, sel_rect.height);

                gdk_region_union_with_rect (clip_region, &sel_rect);
            }

            rect_region = gdk_region_rectangle (&clip_rect);
            gdk_region_intersect (clip_region, rect_region);
            gdk_region_destroy (rect_region);

            gdk_gc_set_clip_region (text_gc, clip_region);
            gdk_draw_layout (drawable, text_gc, 
                     x_origin, y_origin,
                     layout);
            gdk_gc_set_clip_region (text_gc, NULL);
            gdk_gc_set_clip_region (selection_gc, NULL);

            gdk_region_destroy (clip_region);
            g_free (ranges);
        } else {
            if (edit->show_cursor) {
                PangoRectangle strong_pos, weak_pos;
                pango_layout_get_cursor_pos (layout, edit->selection_start + edit->preedit_length, &strong_pos, &weak_pos);
                
                draw_pango_rectangle (drawable, text_view->gc, x_origin, y_origin, strong_pos);
                if (strong_pos.x != weak_pos.x ||
                    strong_pos.y != weak_pos.y ||
                    strong_pos.width != weak_pos.width ||
                    strong_pos.height != weak_pos.height)
                    draw_pango_rectangle (drawable, text_view->gc, x_origin, y_origin, weak_pos);
            }
        }
    }

    g_object_unref (layout);
}

/*
 * Get the background color
 */
static gchar *
ect_get_bg_color(ECellView *ecell_view, int row)
{
    ECellText *ect = E_CELL_TEXT (ecell_view->ecell);
    gchar *color_spec;

    if (ect->bg_color_column == -1)
        return NULL;

    color_spec = e_table_model_value_at (ecell_view->e_table_model,
                                         ect->bg_color_column, row);

    return color_spec;
}


/*
 * Selects the entire string
 */

static void
ect_edit_select_all (ECellTextView *text_view)
{
    g_assert (text_view->edit);
    
    text_view->edit->selection_start = 0;
    text_view->edit->selection_end = strlen (text_view->edit->text);
}

static gboolean
key_begins_editing (GdkEventKey *event)
{
    if (event->length == 0)
        return FALSE;

    return TRUE;
}

/*
 * ECell::event method
 */
static gint
ect_event (ECellView *ecell_view, GdkEvent *event, int model_col, int view_col, int row, ECellFlags flags, ECellActions *actions)
{
    ECellTextView *text_view = (ECellTextView *) ecell_view;
    ETextEventProcessorEvent e_tep_event;
    gboolean edit_display = FALSE;
    gint preedit_len;
    CellEdit *edit = text_view->edit;
    GtkWidget *canvas = GTK_WIDGET (text_view->canvas);
    gint return_val = 0;
    d(gboolean press = FALSE);

    if (!(flags & E_CELL_EDITING))
        return 0;
    
    if ( edit && !edit->preedit_length && flags & E_CELL_PREEDIT)
        return TRUE;

    if (edit && edit->view_col == view_col && edit->row == row) {
        edit_display = TRUE;
    }

    e_tep_event.type = event->type;
    switch (event->type) {
    case GDK_FOCUS_CHANGE:
        break;
    case GDK_KEY_PRESS: /* Fall Through */
        if (edit_display) {
            if (edit->im_context && 
                !edit->im_context_signals_registered) {

                g_signal_connect (edit->im_context, 
                        "preedit_changed",
                        G_CALLBACK (\
                        e_cell_text_preedit_changed_cb),
                        text_view);

                g_signal_connect (edit->im_context, 
                        "commit",
                        G_CALLBACK (\
                        e_cell_text_commit_cb), 
                        text_view);

                g_signal_connect (edit->im_context, 
                        "retrieve_surrounding",
                        G_CALLBACK (\
                        e_cell_text_retrieve_surrounding_cb), 
                        text_view);

                g_signal_connect (edit->im_context, 
                        "delete_surrounding",
                        G_CALLBACK (\
                        e_cell_text_delete_surrounding_cb), 
                        text_view);

                edit->im_context_signals_registered = TRUE;
            }

            edit->show_cursor = FALSE;

        } else {
            if (edit && edit->im_context) {
                g_signal_handlers_disconnect_matched (
                        edit->im_context, 
                        G_SIGNAL_MATCH_DATA, 0, 0, 
                        NULL, NULL, edit);
                edit->im_context_signals_registered = FALSE;
            }

            ect_stop_editing (text_view, TRUE);
        }
        return_val = TRUE;
        /* Fallthrough */
    case GDK_KEY_RELEASE:
        preedit_len = edit->preedit_length;
        if (edit_display && edit->im_context &&
                gtk_im_context_filter_keypress (\
                    edit->im_context,
                    (GdkEventKey*)event)) {

            edit->need_im_reset = TRUE;
            if (preedit_len && flags & E_CELL_PREEDIT)
                return FALSE;
            else
                return TRUE;
        }
                
        if (event->key.keyval == GDK_Escape){
            ect_cancel_edit (text_view);
            return_val = TRUE;
            break;
        }

        if ((!edit_display) &&
            e_table_model_is_cell_editable (ecell_view->e_table_model, model_col, row) &&
            key_begins_editing (&event->key)) {
              e_table_item_enter_edit (text_view->cell_view.e_table_item_view, view_col, row);
              ect_edit_select_all (text_view);
              edit = text_view->edit;
              edit_display = TRUE;
        }       
        if (edit_display) {
            GdkEventKey key = event->key;
            if (key.type == GDK_KEY_PRESS &&
                (key.keyval == GDK_KP_Enter || key.keyval == GDK_Return)) {
                /* stop editing when it's only GDK_KEY_PRESS event */
                e_table_item_leave_edit_ (text_view->cell_view.e_table_item_view);
            } else {
                e_tep_event.key.time = key.time;
                e_tep_event.key.state = key.state;
                e_tep_event.key.keyval = key.keyval;

                /* This is probably ugly hack, but we have to handle UTF-8 input somehow */
#if 0
                e_tep_event.key.length = key.length;
                e_tep_event.key.string = key.string;
#else
                e_tep_event.key.string = e_utf8_from_gtk_event_key (canvas, key.keyval, key.string);
                if (e_tep_event.key.string != NULL) {
                    e_tep_event.key.length = strlen (e_tep_event.key.string);
                } else {
                    e_tep_event.key.length = 0;
                }
#endif
                _get_tep (edit);
                return_val = e_text_event_processor_handle_event (edit->tep, &e_tep_event);
                if (e_tep_event.key.string) 
                    g_free (e_tep_event.key.string);
                break;
            }
        }

        break;
    case GDK_BUTTON_PRESS: /* Fall Through */
        d(press = TRUE);
    case GDK_BUTTON_RELEASE:
        d(g_print ("%s: %s\n", __FUNCTION__, press ? "GDK_BUTTON_PRESS" : "GDK_BUTTON_RELEASE"));
        event->button.x -= 4;
        event->button.y -= 1;
        if ((!edit_display) 
            && e_table_model_is_cell_editable (ecell_view->e_table_model, model_col, row)
            && event->type == GDK_BUTTON_RELEASE
            && event->button.button == 1) {
            GdkEventButton button = event->button;

            e_table_item_enter_edit (text_view->cell_view.e_table_item_view, view_col, row);
            edit = text_view->edit;
            edit_display = TRUE;
            
            e_tep_event.button.type = GDK_BUTTON_PRESS;
            e_tep_event.button.time = button.time;
            e_tep_event.button.state = button.state;
            e_tep_event.button.button = button.button;
            e_tep_event.button.position = get_position_from_xy (edit, event->button.x, event->button.y);
            _get_tep (edit);
            edit->actions = 0;
            return_val = e_text_event_processor_handle_event (edit->tep,
                                      &e_tep_event);
            *actions = edit->actions;
            if (event->button.button == 1) {
                if (event->type == GDK_BUTTON_PRESS)
                    edit->button_down = TRUE;
                else
                    edit->button_down = FALSE;
            }
            edit->lastx = button.x;
            edit->lasty = button.y;
            edit->last_state = button.state;

            e_tep_event.button.type = GDK_BUTTON_RELEASE;
        }
        if (edit_display) {
            GdkEventButton button = event->button;
            e_tep_event.button.time = button.time;
            e_tep_event.button.state = button.state;
            e_tep_event.button.button = button.button;
            e_tep_event.button.position = get_position_from_xy (edit, event->button.x, event->button.y);
            _get_tep (edit);
            edit->actions = 0;
            return_val = e_text_event_processor_handle_event (edit->tep,
                                      &e_tep_event);
            *actions = edit->actions;
            if (event->button.button == 1) {
                if (event->type == GDK_BUTTON_PRESS)
                    edit->button_down = TRUE;
                else
                    edit->button_down = FALSE;
            }
            edit->lastx = button.x;
            edit->lasty = button.y;
            edit->last_state = button.state;
        }
        break;
    case GDK_MOTION_NOTIFY:
        event->motion.x -= 4;
        event->motion.y -= 1;
        if (edit_display) {
            GdkEventMotion motion = event->motion;
            e_tep_event.motion.time = motion.time;
            e_tep_event.motion.state = motion.state;
            e_tep_event.motion.position = get_position_from_xy (edit, event->motion.x, event->motion.y);
            _get_tep (edit);
            edit->actions = 0;
            return_val = e_text_event_processor_handle_event (edit->tep,
                                      &e_tep_event);
            *actions = edit->actions;
            edit->lastx = motion.x;
            edit->lasty = motion.y;
            edit->last_state = motion.state;
        }
        break;
    case GDK_ENTER_NOTIFY:
#if 0
        edit->pointer_in = TRUE;
#endif
        if (edit_display) {
            if (edit->default_cursor_shown){
                gdk_window_set_cursor (canvas->window, text_view->i_cursor);
                edit->default_cursor_shown = FALSE;
            }
        }
        break;
    case GDK_LEAVE_NOTIFY:
#if 0
        text_view->pointer_in = FALSE;
#endif
        if (edit_display) {
            if (! edit->default_cursor_shown){
                gdk_window_set_cursor (canvas->window, NULL);
                edit->default_cursor_shown = TRUE;
            }
        }
        break;
    default:
        break;
    }

    return return_val;
}

/*
 * ECell::height method
 */
static int
ect_height (ECellView *ecell_view, int model_col, int view_col, int row) 
{
    ECellTextView *text_view = (ECellTextView *) ecell_view;
    gint height;
    PangoLayout *layout;

    layout = generate_layout (text_view, model_col, view_col, row, 0);
    pango_layout_get_pixel_size (layout, NULL, &height);
    g_object_unref (layout);
    return height + 2;
}

/*
 * ECellView::enter_edit method
 */
static void *
ect_enter_edit (ECellView *ecell_view, int model_col, int view_col, int row)
{
    ECellTextView *text_view = (ECellTextView *) ecell_view;
    CellEdit *edit;
    ECellText *ect = E_CELL_TEXT(ecell_view->ecell);
    char *temp;

    edit = g_new0 (CellEdit, 1);
    text_view->edit = edit;

    edit->im_context =  E_CANVAS (text_view->canvas)->im_context;
    edit->need_im_reset = FALSE;
    edit->im_context_signals_registered = FALSE;
    edit->view_col = -1;
    edit->model_col = -1;
    edit->row = -1;

    edit->text_view = text_view;
    edit->model_col = model_col;
    edit->view_col = view_col;
    edit->row = row;
    edit->cell_width = e_table_header_get_column (
        ((ETableItem *)ecell_view->e_table_item_view)->header,
        view_col)->width - 8;

    edit->layout = generate_layout (text_view, model_col, view_col, row, edit->cell_width);
    
    edit->xofs_edit = 0.0;
    edit->yofs_edit = 0.0;
    
    edit->selection_start = 0;
    edit->selection_end = 0;
    edit->select_by_word = FALSE;

    edit->timeout_id = g_timeout_add (10, _blink_scroll_timeout, text_view);
    edit->timer = g_timer_new ();
    g_timer_elapsed (edit->timer, &(edit->scroll_start));
    g_timer_start (edit->timer);

    edit->lastx = 0;
    edit->lasty = 0;
    edit->last_state = 0;

    edit->scroll_start = 0;
    edit->show_cursor = TRUE;
    edit->button_down = FALSE;
    
    edit->tep = NULL;

    edit->has_selection = FALSE;
    
    edit->pointer_in = FALSE;
    edit->default_cursor_shown = TRUE;
    
    temp = e_cell_text_get_text(ect, ecell_view->e_table_model, model_col, row);
    edit->old_text = g_strdup (temp);
    e_cell_text_free_text(ect, temp);
    edit->text = g_strdup (edit->old_text);

#if 0
    if (edit->pointer_in){
        if (edit->default_cursor_shown){
            gdk_window_set_cursor (GTK_WIDGET(item->canvas)->window, text_view->i_cursor);
            edit->default_cursor_shown = FALSE;
        }
    }
#endif
    ect_queue_redraw (text_view, view_col, row);
    
    return NULL;
}

/*
 * ECellView::leave_edit method
 */
static void
ect_leave_edit (ECellView *ecell_view, int model_col, int view_col, int row, void *edit_context)
{
    ECellTextView *text_view = (ECellTextView *) ecell_view;
    CellEdit *edit = text_view->edit;

    if (edit){
        ect_stop_editing (text_view, TRUE);
    } else {
        /*
         * We did invoke this leave edit internally
         */
    }
}

/*
 * ECellView::save_state method
 */
static void *
ect_save_state (ECellView *ecell_view, int model_col, int view_col, int row, void *edit_context)
{
    ECellTextView *text_view = (ECellTextView *) ecell_view;
    CellEdit *edit = text_view->edit;

    int *save_state = g_new (int, 2);

    save_state[0] = edit->selection_start;
    save_state[1] = edit->selection_end;
    return save_state;
}

/*
 * ECellView::load_state method
 */
static void
ect_load_state (ECellView *ecell_view, int model_col, int view_col, int row, void *edit_context, void *save_state)
{
    ECellTextView *text_view = (ECellTextView *) ecell_view;
    CellEdit *edit = text_view->edit;
    int length;
    int *selection = save_state;

    length = strlen (edit->text);

    edit->selection_start = MIN (selection[0], length);
    edit->selection_end = MIN (selection[1], length);

    ect_queue_redraw (text_view, view_col, row);
}

/*
 * ECellView::free_state method
 */
static void
ect_free_state (ECellView *ecell_view, int model_col, int view_col, int row, void *save_state)
{
    g_free (save_state);
}

#define FONT_NAME "Sans Regular"

static PangoFontDescription *
get_font_description_for_size (double h)
{
    PangoFontDescription *font_des = pango_font_description_new ();
    pango_font_description_set_family (font_des, FONT_NAME);
    pango_font_description_set_size (font_des, h * PANGO_SCALE);
    return font_des;
}

static void
get_font_size (PangoLayout *layout, PangoFontDescription *font, const char *text,
        double *width, double *height)
{
    int w;
    int h;

    g_return_if_fail (layout != NULL);
    pango_layout_set_font_description (layout, font);
    pango_layout_set_text (layout, text, -1);
    pango_layout_set_width (layout, -1);
    pango_layout_set_indent (layout, 0);

    pango_layout_get_size (layout, &w, &h);

    *width = (double)w/(double)PANGO_SCALE;
    *height = (double)h/(double)PANGO_SCALE;
}

static void
ect_print (ECellView *ecell_view, GtkPrintContext *context, 
       int model_col, int view_col, int row,
       double width, double height)
{
    PangoFontDescription *font_des = get_font_description_for_size (12);
    PangoLayout *layout;
    PangoContext *pango_context;
    PangoFontMetrics *font_metrics;
    ECellText *ect = E_CELL_TEXT(ecell_view->ecell);
    ECellTextView *ectView = (ECellTextView *)ecell_view;
    GtkWidget *canvas = GTK_WIDGET(ectView->canvas); 
    PangoDirection dir;
    gboolean strikeout, underline;
    cairo_t *cr;
    char *string;
    double ty, ly, text_width = 0.0, text_height = 0.0;


    cr = gtk_print_context_get_cairo_context (context);
    string = e_cell_text_get_text(ect, ecell_view->e_table_model, model_col, row);

    cairo_save (cr);
    layout = gtk_print_context_create_pango_layout (context);
    font_des = pango_font_description_from_string ("sans 12"); /* fix me font hardcoded */
    pango_layout_set_font_description (layout, font_des);
    
    pango_layout_set_text (layout, string, -1);
    get_font_size (layout, font_des, string, &text_width, &text_height);
    
    cairo_move_to(cr, 2, 2);
    cairo_rectangle (cr, 2, 2, width + 2, height + 2);
    cairo_clip(cr);   

    pango_context = gtk_widget_get_pango_context (canvas);
    font_metrics = pango_context_get_metrics (pango_context,
                   canvas->style->font_desc, pango_context_get_language(pango_context));
    ty =  (double)(text_height 
               - pango_font_metrics_get_ascent (font_metrics) 
               - pango_font_metrics_get_descent (font_metrics)) / 2.0 /(double)PANGO_SCALE;

    strikeout = ect->strikeout_column >= 0 && row >= 0 &&
        e_table_model_value_at (ecell_view->e_table_model, ect->strikeout_column, row);
    underline = ect->underline_column >= 0 && row >= 0 &&
        e_table_model_value_at(ecell_view->e_table_model, ect->underline_column, row);

    dir = pango_find_base_dir (string, strlen(string));
    
    if (underline) {
        ly = ty + (double)pango_font_metrics_get_underline_position (font_metrics)/(double)PANGO_SCALE;
        cairo_new_path (cr);
        if (dir == PANGO_DIRECTION_RTL) {
            cairo_move_to (cr, width - 2, ly + text_height + 6);
            cairo_line_to (cr, MAX (width - 2 - text_width, 2), ly + text_height + 6);
        }
        else {
            cairo_move_to (cr, 2, ly + text_height + 6);
            cairo_line_to (cr, MIN (2 + text_width, width - 2), ly + text_height + 6);
        }
        cairo_set_line_width (cr, (double)pango_font_metrics_get_underline_thickness (font_metrics)/(double)PANGO_SCALE);
        cairo_stroke (cr);
    }

    if (strikeout) {
        ly = ty + (double)pango_font_metrics_get_strikethrough_position (font_metrics)/(double)PANGO_SCALE;
        cairo_new_path (cr);
        if (dir == PANGO_DIRECTION_RTL) {
            cairo_move_to (cr, width - 2, ly + text_height + 6);
            cairo_line_to (cr, MAX (width - 2 - text_width, 2), ly + text_height + 6);
        }
        else {
            cairo_move_to (cr, 2, ly + text_height + 6);
            cairo_line_to (cr, MIN (2 + text_width, width - 2), ly + text_height + 6);
        }
            cairo_set_line_width (cr,(double)pango_font_metrics_get_strikethrough_thickness (font_metrics)/(double)PANGO_SCALE);

                cairo_stroke (cr);
    }   

    cairo_move_to(cr, 2, text_height- 5);
    pango_layout_set_width (layout, (width - 4)*PANGO_SCALE); 
    pango_cairo_show_layout(cr, layout);
    cairo_restore (cr);

    pango_font_description_free (font_des);
    g_object_unref (layout);
    e_cell_text_free_text(ect, string);
}

static gdouble
ect_print_height (ECellView *ecell_view, GtkPrintContext *context, 
          int model_col, int view_col, int row,
          double width)
{
    /* 
     * Font size is 16 by default. To leave some margin for cell 
     * text area, 2 for footer, 2 for header, actual print height 
     * should be 16 + 4.
     * Height of some special font is much higher than others, 
     * such as Arabic. So leave some more margin for cell.
`    */
    return 16 + 8;
}

static int
ect_max_width (ECellView *ecell_view,
           int model_col,
           int view_col)
{
    /* New ECellText */
    ECellTextView *text_view = (ECellTextView *) ecell_view;
    int row;
    int number_of_rows;
    int max_width = 0;

    number_of_rows = e_table_model_row_count (ecell_view->e_table_model);

    for (row = 0; row < number_of_rows; row++) {
        PangoLayout *layout = generate_layout (text_view, model_col, view_col, row, 0);
        int width;

        pango_layout_get_pixel_size (layout, &width, NULL);

        max_width = MAX (max_width, width);
        g_object_unref (layout);
    }
    
    return max_width + 8;
}

static int
ect_max_width_by_row (ECellView *ecell_view,
              int model_col,
              int view_col,
              int row)
{
    /* New ECellText */
    ECellTextView *text_view = (ECellTextView *) ecell_view;
    int width;
    PangoLayout *layout;

    if (row >= e_table_model_row_count (ecell_view->e_table_model))
        return 0;

    layout = generate_layout (text_view, model_col, view_col, row, 0);
    pango_layout_get_pixel_size (layout, &width, NULL);
    g_object_unref (layout);
    
    return width + 8;
}

static gint
tooltip_event (GtkWidget *window,
           GdkEvent *event,
           ETableTooltip *tooltip)
{
    gint ret_val = FALSE;
    
    switch (event->type) {
    case GDK_LEAVE_NOTIFY:
        e_canvas_hide_tooltip (E_CANVAS(GNOME_CANVAS_ITEM(tooltip->eti)->canvas));
        break;
    case GDK_BUTTON_PRESS:
    case GDK_BUTTON_RELEASE:
        if (event->type == GDK_BUTTON_RELEASE) {
            e_canvas_hide_tooltip (E_CANVAS(GNOME_CANVAS_ITEM(tooltip->eti)->canvas));
        }

        event->button.x = tooltip->cx;
        event->button.y = tooltip->cy;
        g_signal_emit_by_name (tooltip->eti, "event",
                       event, &ret_val);
        if (!ret_val)
            gtk_propagate_event (GTK_WIDGET(GNOME_CANVAS_ITEM(tooltip->eti)->canvas), event);
        ret_val = TRUE;
        break;
    case GDK_KEY_PRESS:
        e_canvas_hide_tooltip (E_CANVAS(GNOME_CANVAS_ITEM(tooltip->eti)->canvas));
        g_signal_emit_by_name (tooltip->eti, "event",
                       event, &ret_val);
        if (!ret_val)
            gtk_propagate_event (GTK_WIDGET(GNOME_CANVAS_ITEM(tooltip->eti)->canvas), event);
        ret_val = TRUE;
        break;
    default:
        break;
    }

    return ret_val;
}

static void
ect_show_tooltip (ECellView *ecell_view, 
          int model_col,
          int view_col,
          int row,
          int col_width,
          ETableTooltip *tooltip)
{
    ECellTextView *text_view = (ECellTextView *) ecell_view;
    GtkWidget *canvas;
    double i2c[6];
    ArtPoint origin = {0, 0};
    ArtPoint pixel_origin;
    int canvas_x, canvas_y;
    GnomeCanvasItem *tooltip_text;
    double tooltip_width;
    double tooltip_height;
    double tooltip_x;
    double tooltip_y;
    GnomeCanvasItem *rect;
    ECellText *ect = E_CELL_TEXT(ecell_view->ecell);
    GtkWidget *window;
    PangoLayout *layout;
    int width, height;

    tooltip->timer = 0;

    layout = generate_layout (text_view, model_col, view_col, row, col_width);

    pango_layout_get_pixel_size (layout, &width, &height);
    if (width < col_width - 8) {
        return;
    }

    gnome_canvas_item_i2c_affine (GNOME_CANVAS_ITEM (tooltip->eti), i2c);
    art_affine_point (&pixel_origin, &origin, i2c);

    gdk_window_get_origin (GTK_WIDGET (text_view->canvas)->window,
                   &canvas_x, &canvas_y);
    pixel_origin.x += canvas_x;
    pixel_origin.y += canvas_y;
    pixel_origin.x -= (int) gtk_layout_get_hadjustment (GTK_LAYOUT (text_view->canvas))->value;
    pixel_origin.y -= (int) gtk_layout_get_vadjustment (GTK_LAYOUT (text_view->canvas))->value;

    window = gtk_window_new (GTK_WINDOW_POPUP);
    gtk_container_set_border_width (GTK_CONTAINER (window), 1);

    canvas = e_canvas_new ();
    gtk_container_add (GTK_CONTAINER (window), canvas);
    GTK_WIDGET_UNSET_FLAGS (canvas, GTK_CAN_FOCUS);
    GTK_WIDGET_UNSET_FLAGS (window, GTK_CAN_FOCUS);

    rect = gnome_canvas_item_new (gnome_canvas_root (GNOME_CANVAS (canvas)),
                      gnome_canvas_rect_get_type (),
                      "x1", (double) 0.0,
                      "y1", (double) 0.0,
                      "x2", (double) width + 4,
                      "y2", (double) height,
                      "fill_color_gdk", tooltip->background,
                      NULL);

    tooltip_text = gnome_canvas_item_new (gnome_canvas_root (GNOME_CANVAS (canvas)),
                          e_text_get_type (),
                          "anchor", GTK_ANCHOR_NW,
                          "bold", (gboolean) ect->bold_column >= 0 && e_table_model_value_at(ecell_view->e_table_model, ect->bold_column, row),
                          "strikeout", (gboolean) ect->strikeout_column >= 0 && e_table_model_value_at(ecell_view->e_table_model, ect->strikeout_column, row),
                          "underline", (gboolean) ect->underline_column >= 0 && e_table_model_value_at(ecell_view->e_table_model, ect->underline_column, row),
                          "fill_color_gdk", tooltip->foreground,
                          "text", pango_layout_get_text (layout),
                          "editable", FALSE,
                          "clip_width", (double) width,
                          "clip_height", (double) height,
                          "clip", TRUE,
                          "line_wrap", FALSE,
                          "justification", E_CELL_TEXT (text_view->cell_view.ecell)->justify,
                          "draw_background", FALSE,
                          NULL);

    tooltip_width = width;
    tooltip_height = height;
    tooltip_y = tooltip->y;

    /* This looks very broken since tooltip_x is never used?!
     * Maybe tooltip->x is what was meant here and just get rid of
     * both tooltip_x and tooltip_y?
     */
    switch (E_CELL_TEXT (text_view->cell_view.ecell)->justify) {
    case GTK_JUSTIFY_CENTER:
        tooltip_x = - tooltip_width / 2;
        break;
    case GTK_JUSTIFY_RIGHT:
        tooltip_x = tooltip_width / 2;
        break;
    case GTK_JUSTIFY_FILL:
    case GTK_JUSTIFY_LEFT:
        tooltip_x = tooltip->x;
        break;
    }

    gnome_canvas_item_move (tooltip_text, 3.0, 1.0);
    gnome_canvas_item_set (rect,
                   "x2", (double) tooltip_width + 6,
                   "y2", (double) tooltip->row_height + 1,
                   NULL);
    gtk_widget_set_size_request (window, tooltip_width + 6,
                     tooltip->row_height + 1);
    gnome_canvas_set_scroll_region (GNOME_CANVAS (canvas), 0.0, 0.0,
                    (double) tooltip_width + 6,
                    (double) tooltip_height);
    gtk_widget_show (canvas);
    gtk_widget_realize (window);
    g_signal_connect (window, "event",
              G_CALLBACK (tooltip_event), tooltip);

    e_canvas_popup_tooltip (E_CANVAS(text_view->canvas), window, pixel_origin.x + tooltip->x,
                pixel_origin.y + tooltip->y - 1);

    return;
}

/*
 * GtkObject::destroy method
 */
static void
ect_finalize (GObject *object)
{
    ECellText *ect = E_CELL_TEXT (object);

    g_free (ect->font_name);

    G_OBJECT_CLASS (parent_class)->finalize (object);
}
/* Set_arg handler for the text item */
static void
ect_set_property (GObject *object,
          guint prop_id,
          const GValue *value,
          GParamSpec *pspec)
{
    ECellText *text;

    text = E_CELL_TEXT (object);

    switch (prop_id) {
    case PROP_STRIKEOUT_COLUMN:
        text->strikeout_column = g_value_get_int (value);
        break;

    case PROP_UNDERLINE_COLUMN:
        text->underline_column = g_value_get_int (value);
        break;

    case PROP_BOLD_COLUMN:
        text->bold_column = g_value_get_int (value);
        break;

    case PROP_COLOR_COLUMN:
        text->color_column = g_value_get_int (value);
        break;

    case PROP_EDITABLE:
        text->editable = g_value_get_boolean (value);
        break;

    case PROP_BG_COLOR_COLUMN:
        text->bg_color_column = g_value_get_int (value);
        break;

    default:
        return;
    }
}

/* Get_arg handler for the text item */
static void
ect_get_property (GObject *object,
          guint prop_id,
          GValue *value,
          GParamSpec *pspec)
{
    ECellText *text;

    text = E_CELL_TEXT (object);

    switch (prop_id) {
    case PROP_STRIKEOUT_COLUMN:
        g_value_set_int (value, text->strikeout_column);
        break;

    case PROP_UNDERLINE_COLUMN:
        g_value_set_int (value, text->underline_column);
        break;

    case PROP_BOLD_COLUMN:
        g_value_set_int (value, text->bold_column);
        break;

    case PROP_COLOR_COLUMN:
        g_value_set_int (value, text->color_column);
        break;

    case PROP_EDITABLE:
        g_value_set_boolean (value, text->editable);
        break;

    case PROP_BG_COLOR_COLUMN:
        g_value_set_int (value, text->bg_color_column);
        break;

    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
        break;
    }
}

static char *ellipsis_default = NULL;
static gboolean use_ellipsis_default = TRUE;

static void
e_cell_text_class_init (GObjectClass *object_class)
{
    ECellClass *ecc = (ECellClass *) object_class;
    ECellTextClass *ectc = (ECellTextClass *) object_class;
    const char *ellipsis_env;

    G_OBJECT_CLASS (object_class)->finalize = ect_finalize;

    ecc->new_view   = ect_new_view;
    ecc->kill_view  = ect_kill_view;
    ecc->realize    = ect_realize;
    ecc->unrealize  = ect_unrealize;
    ecc->draw       = ect_draw;
    ecc->event      = ect_event;
    ecc->height     = ect_height;
    ecc->enter_edit = ect_enter_edit;
    ecc->leave_edit = ect_leave_edit;
    ecc->save_state = ect_save_state;
    ecc->load_state = ect_load_state;
    ecc->free_state = ect_free_state;
    ecc->print      = ect_print;
    ecc->print_height = ect_print_height;
    ecc->max_width = ect_max_width;
    ecc->max_width_by_row = ect_max_width_by_row;
    ecc->show_tooltip = ect_show_tooltip;
    ecc->get_bg_color = ect_get_bg_color;

    ectc->get_text = ect_real_get_text;
    ectc->free_text = ect_real_free_text;
    ectc->set_value = ect_real_set_value;

    object_class->get_property = ect_get_property;
    object_class->set_property = ect_set_property;

    parent_class = g_type_class_ref (PARENT_TYPE);

    signals [TEXT_INSERTED] = 
        g_signal_new ("text_inserted",
                  G_TYPE_FROM_CLASS (object_class),
                  G_SIGNAL_RUN_FIRST,
                  G_STRUCT_OFFSET (ECellTextClass, text_inserted),
                  NULL, NULL,
                  e_util_marshal_VOID__POINTER_INT_INT_INT_INT,
                  G_TYPE_NONE, 5,
                  G_TYPE_POINTER, G_TYPE_INT, G_TYPE_INT,
                  G_TYPE_INT, G_TYPE_INT);

    signals [TEXT_DELETED] = 
        g_signal_new ("text_deleted",
                  G_TYPE_FROM_CLASS (object_class),
                  G_SIGNAL_RUN_FIRST,
                  G_STRUCT_OFFSET (ECellTextClass, text_deleted),
                  NULL, NULL,
                  e_util_marshal_VOID__POINTER_INT_INT_INT_INT,
                  G_TYPE_NONE, 5,
                  G_TYPE_POINTER, G_TYPE_INT, G_TYPE_INT,
                  G_TYPE_INT, G_TYPE_INT);



    g_object_class_install_property (object_class, PROP_STRIKEOUT_COLUMN,
                     g_param_spec_int ("strikeout_column",
                               _("Strikeout Column"),
                               /*_( */"XXX blurb" /*)*/,
                               -1, G_MAXINT, -1,
                               G_PARAM_READWRITE));

    g_object_class_install_property (object_class, PROP_UNDERLINE_COLUMN,
                     g_param_spec_int ("underline_column",
                               _("Underline Column"),
                               /*_( */"XXX blurb" /*)*/,
                               -1, G_MAXINT, -1,
                               G_PARAM_READWRITE));

    g_object_class_install_property (object_class, PROP_BOLD_COLUMN,
                     g_param_spec_int ("bold_column",
                               _("Bold Column"),
                               /*_( */"XXX blurb" /*)*/,
                               -1, G_MAXINT, -1,
                               G_PARAM_READWRITE));

    g_object_class_install_property (object_class, PROP_COLOR_COLUMN,
                     g_param_spec_int ("color_column",
                               _("Color Column"),
                               /*_( */"XXX blurb" /*)*/,
                               -1, G_MAXINT, -1,
                               G_PARAM_READWRITE));

    g_object_class_install_property (object_class, PROP_EDITABLE,
                     g_param_spec_boolean ("editable",
                                   _("Editable"),
                                   /*_( */"XXX blurb" /*)*/,
                                   FALSE,
                                   G_PARAM_READWRITE));

    g_object_class_install_property (object_class, PROP_BG_COLOR_COLUMN,
                     g_param_spec_int ("bg_color_column",
                               _("BG Color Column"),
                               /*_( */"XXX blurb" /*)*/,
                               -1, G_MAXINT, -1,
                               G_PARAM_READWRITE));

    if (!clipboard_atom)
        clipboard_atom = gdk_atom_intern ("CLIPBOARD", FALSE);

    ellipsis_env = g_getenv ("GAL_ELLIPSIS");
    if (ellipsis_env) {
        if (*ellipsis_env) {
            ellipsis_default = g_strdup (ellipsis_env);
        } else {
            use_ellipsis_default = FALSE;
        }
    }
    
    gal_a11y_e_cell_registry_add_cell_type (NULL, E_CELL_TEXT_TYPE, gal_a11y_e_cell_text_new);
}


/* IM Context Callbacks */

static void
e_cell_text_preedit_changed_cb (GtkIMContext *context,
          ECellTextView    *tv)
{
    gchar *preedit_string;
    gint cursor_pos;
    CellEdit *edit=tv->edit;
    gtk_im_context_get_preedit_string (edit->im_context, &preedit_string, 
                    NULL, &cursor_pos);
                                                      
    edit->preedit_length = strlen (preedit_string);
    cursor_pos =  CLAMP (cursor_pos, 0, g_utf8_strlen (preedit_string, -1)); 
    g_free (preedit_string);
    ect_queue_redraw (tv, edit->view_col, edit->row);
}

static void
e_cell_text_commit_cb (GtkIMContext *context,
          const gchar  *str,
          ECellTextView    *tv)
{
    CellEdit *edit = tv->edit;
    ETextEventProcessorCommand command;
                                                      
    if (g_utf8_validate (str, strlen (str), NULL)) {
        command.action = E_TEP_INSERT;
        command.position = E_TEP_SELECTION;
        command.string = (gchar *)str;
        command.value = strlen(str);
        e_cell_text_view_command (edit->tep, &command, edit);
    }

}

static gboolean
e_cell_text_retrieve_surrounding_cb (GtkIMContext *context,
                ECellTextView        *tv)
{
    CellEdit *edit = tv->edit;

    gtk_im_context_set_surrounding (context,
                    edit->text,
                    strlen (edit->text),
                    MIN (edit->selection_start, edit->selection_end)
                    );
    
    return TRUE;
}

static gboolean
e_cell_text_delete_surrounding_cb   (GtkIMContext *context,
                gint          offset,
                gint          n_chars,
                ECellTextView        *tv)
{
    int begin_pos, end_pos;
    glong text_len;
    CellEdit *edit = tv->edit;

    text_len = g_utf8_strlen (edit->text, -1);
    begin_pos = g_utf8_pointer_to_offset (edit->text,
                                  edit->text + MIN (edit->selection_start, edit->selection_end));
    begin_pos += offset;
    end_pos = begin_pos + n_chars;
    if(begin_pos < 0 || text_len < begin_pos)
        return FALSE;
    if(end_pos > text_len)
        end_pos = text_len;
    edit->selection_start = g_utf8_offset_to_pointer (edit->text, begin_pos)
                        - edit->text;
    edit->selection_end = g_utf8_offset_to_pointer (edit->text, end_pos)
                      - edit->text;

    _delete_selection (tv);

    return TRUE;
}

static void
e_cell_text_init (ECellText *ect)
{
    ect->ellipsis = g_strdup (ellipsis_default);
    ect->use_ellipsis = use_ellipsis_default;
    ect->strikeout_column = -1;
    ect->underline_column = -1;
    ect->bold_column = -1;
    ect->color_column = -1;
    ect->bg_color_column = -1;
    ect->editable = TRUE;
}

E_MAKE_TYPE(e_cell_text, "ECellText", ECellText, e_cell_text_class_init, e_cell_text_init, PARENT_TYPE)

/**
 * e_cell_text_construct:
 * @cell: The cell to construct
 * @fontname: this param is no longer used, but left here for api stability
 * @justify: Justification of the string in the cell
 *
 * constructs the ECellText.  To be used by subclasses and language
 * bindings.
 *
 * Returns: The ECellText.
 */
ECell *
e_cell_text_construct (ECellText *cell, const char *fontname, GtkJustification justify)
{
    if(!cell)
        return E_CELL(NULL);
    if(fontname)
        cell->font_name = g_strdup (fontname);
    cell->justify = justify;
    return E_CELL(cell);
}

/**
 * e_cell_text_new:
 * @fontname: this param is no longer used, but left here for api stability
 * @justify: Justification of the string in the cell.
 *
 * Creates a new ECell renderer that can be used to render strings that
 * that come from the model.  The value returned from the model is
 * interpreted as being a char *.
 *
 * The ECellText object support a large set of properties that can be
 * configured through the Gtk argument system and allows the user to have
 * a finer control of the way the string is displayed.  The arguments supported
 * allow the control of strikeout, underline, bold, and color.
 *
 * The arguments "strikeout_column", "underline_column", "bold_column"
 * and "color_column" set and return an integer that points to a
 * column in the model that controls these settings.  So controlling
 * the way things are rendered is achieved by having special columns
 * in the model that will be used to flag whether the text should be
 * rendered with strikeout, or bolded.  In the case of the
 * "color_column" argument, the column in the model is expected to
 * have a string that can be parsed by gdk_color_parse().
 * 
 * Returns: an ECell object that can be used to render strings.
 */
ECell *
e_cell_text_new (const char *fontname, GtkJustification justify)
{
    ECellText *ect = g_object_new (E_CELL_TEXT_TYPE, NULL);

    e_cell_text_construct(ect, fontname, justify);

    return (ECell *) ect;
}


/* fixme: Handle Font attributes */
/* position is in BYTES */

static gint
get_position_from_xy (CellEdit *edit, gint x, gint y)
{
    int index;
    int trailing;
    const char *text;

    PangoLayout *layout = generate_layout (edit->text_view, edit->model_col, edit->view_col, edit->row, edit->cell_width);
    ECellTextView *text_view = edit->text_view;
    ECellText *ect = (ECellText *) ((ECellView *)text_view)->ecell;

    x -= (ect->x + text_view->xofs - edit->xofs_edit);
    y -= (ect->y + text_view->yofs - edit->yofs_edit);

    pango_layout_xy_to_index (layout, x * PANGO_SCALE, y * PANGO_SCALE, &index, &trailing);

    text = pango_layout_get_text (layout);

    return g_utf8_offset_to_pointer (text + index, trailing) - text;
}

#define SCROLL_WAIT_TIME 30000

static gboolean
_blink_scroll_timeout (gpointer data)
{
    ECellTextView *text_view = (ECellTextView *) data;
    ECellText *ect = E_CELL_TEXT (((ECellView *)text_view)->ecell);
    CellEdit *edit = text_view->edit;

    gulong current_time;
    gboolean scroll = FALSE;
    gboolean redraw = FALSE;
    int width, height;
    
    g_timer_elapsed (edit->timer, &current_time);

    if (edit->scroll_start + SCROLL_WAIT_TIME > 1000000) {
        if (current_time > edit->scroll_start - (1000000 - SCROLL_WAIT_TIME) &&
            current_time < edit->scroll_start)
            scroll = TRUE;
    } else {
        if (current_time > edit->scroll_start + SCROLL_WAIT_TIME ||
            current_time < edit->scroll_start)
            scroll = TRUE;
    }

    pango_layout_get_pixel_size (edit->layout, &width, &height);

    if (scroll && edit->button_down) {
        /* FIXME: Copy this for y. */
        if (edit->lastx - ect->x > edit->cell_width) {
            if (edit->xofs_edit < width - edit->cell_width) {
                edit->xofs_edit += 4;
                if (edit->xofs_edit > width - edit->cell_width + 1)
                    edit->xofs_edit = width - edit->cell_width + 1;
                redraw = TRUE;
            }
        }
        if (edit->lastx - ect->x < 0 &&
            edit->xofs_edit > 0) {
            edit->xofs_edit -= 4;
            if (edit->xofs_edit < 0)
                edit->xofs_edit = 0;
            redraw = TRUE;
        }
        if (redraw) {
            ETextEventProcessorEvent e_tep_event;
            e_tep_event.type = GDK_MOTION_NOTIFY;
            e_tep_event.motion.state = edit->last_state;
            e_tep_event.motion.time = 0;
            e_tep_event.motion.position = get_position_from_xy (edit, edit->lastx, edit->lasty);
            _get_tep (edit);
            e_text_event_processor_handle_event (edit->tep,
                                 &e_tep_event);
            edit->scroll_start = current_time;
        }
    }

    if (!((current_time / 500000) % 2)) {
        if (!edit->show_cursor)
            redraw = TRUE;
        edit->show_cursor = TRUE;
    } else {
        if (edit->show_cursor)
            redraw = TRUE;
        edit->show_cursor = FALSE;
    }
    if (redraw){
        ect_queue_redraw (text_view, edit->view_col, edit->row);
    }
    return TRUE;
}

static int
next_word (CellEdit *edit, int start)
{
    char *p;
    int length;

    length = strlen (edit->text);
    if (start >= length)
        return length;

    p = g_utf8_next_char (edit->text + start);

    while (*p && g_unichar_validate (g_utf8_get_char (p))) {
        gunichar unival = g_utf8_get_char (p);
        if (g_unichar_isspace (unival))
            return p - edit->text;
        p = g_utf8_next_char (p);
    }

    return p - edit->text;
}

static int
_get_position (ECellTextView *text_view, ETextEventProcessorCommand *command)
{
    int length;
    CellEdit *edit = text_view->edit;
    gchar *p;
    int unival;
    int index;
    int trailing;
    
    switch (command->position) {
        
    case E_TEP_VALUE:
        return command->value;

    case E_TEP_SELECTION:
        return edit->selection_end;

    case E_TEP_START_OF_BUFFER:
        return 0;

        /* fixme: this probably confuses TEP */

    case E_TEP_END_OF_BUFFER:
        return strlen (edit->text);

    case E_TEP_START_OF_LINE:

        if (edit->selection_end < 1) return 0;

        p = g_utf8_find_prev_char (edit->text, edit->text + edit->selection_end);

        if (p == edit->text) return 0;

        p = g_utf8_find_prev_char (edit->text, p);

        while (p && p > edit->text) {
            if (*p == '\n') return p - edit->text + 1;
            p = g_utf8_find_prev_char (edit->text, p);
        }

        return 0;

    case E_TEP_END_OF_LINE:

        length = strlen (edit->text);
        if (edit->selection_end >= length) return length;

        p = g_utf8_next_char (edit->text + edit->selection_end);

        while (*p && g_unichar_validate (g_utf8_get_char (p))) {
            if (*p == '\n') return p - edit->text;
            p = g_utf8_next_char (p);
        }

        return p - edit->text;

    case E_TEP_FORWARD_CHARACTER:

        length = strlen (edit->text);
        if (edit->selection_end >= length) return length;

        p = g_utf8_next_char (edit->text + edit->selection_end);

        return p - edit->text;

    case E_TEP_BACKWARD_CHARACTER:

        if (edit->selection_end < 1) return 0;

        p = g_utf8_find_prev_char (edit->text, edit->text + edit->selection_end);

        if (p == NULL) return 0;

        return p - edit->text;

    case E_TEP_FORWARD_WORD:
        return next_word (edit, edit->selection_end);

    case E_TEP_BACKWARD_WORD:

        if (edit->selection_end < 1) return 0;

        p = g_utf8_find_prev_char (edit->text, edit->text + edit->selection_end);

        if (p == edit->text) return 0;

        p = g_utf8_find_prev_char (edit->text, p);

        while (p && p > edit->text && g_unichar_validate (g_utf8_get_char (p))) {
            unival = g_utf8_get_char (p);
            if (g_unichar_isspace (unival)) {
                return (g_utf8_next_char (p) - edit->text);
            }
            p = g_utf8_find_prev_char (edit->text, p);
        }

        return 0;

    case E_TEP_FORWARD_LINE:
        pango_layout_move_cursor_visually (edit->layout,
                           TRUE,
                           edit->selection_end,
                           0,
                           TRUE,
                           &index,
                           &trailing);
        index = g_utf8_offset_to_pointer (edit->text + index, trailing) - edit->text;
        if (index < 0)
            return 0;
        length = strlen (edit->text);
        if (index >= length)
            return length;
        return index;
    case E_TEP_BACKWARD_LINE:
        pango_layout_move_cursor_visually (edit->layout,
                           TRUE,
                           edit->selection_end,
                           0,
                           TRUE,
                           &index,
                           &trailing);

        index = g_utf8_offset_to_pointer (edit->text + index, trailing) - edit->text;
        if (index < 0)
            return 0;
        length = strlen (edit->text);
        if (index >= length)
            return length;
        return index;
    case E_TEP_FORWARD_PARAGRAPH:
    case E_TEP_BACKWARD_PARAGRAPH:
        
    case E_TEP_FORWARD_PAGE:
    case E_TEP_BACKWARD_PAGE:
        return edit->selection_end;
    default:
        return edit->selection_end;
    }
    g_assert_not_reached ();
    return 0; /* Kill warning */
}

static void
_delete_selection (ECellTextView *text_view)
{
    CellEdit *edit = text_view->edit;
    gint length;
    gchar *sp, *ep;

    if (edit->selection_end == edit->selection_start) return;

    if (edit->selection_end < edit->selection_start) {
        edit->selection_end ^= edit->selection_start;
        edit->selection_start ^= edit->selection_end;
        edit->selection_end ^= edit->selection_start;
    }

    sp = edit->text + edit->selection_start;
    ep = edit->text + edit->selection_end;
    length = strlen (ep) + 1;

    memmove (sp, ep, length);

    edit->selection_end = edit->selection_start;

    g_signal_emit (VIEW_TO_CELL (text_view), signals[TEXT_DELETED], 0, text_view, edit->selection_start, ep-sp, edit->row, edit->model_col);
}

/* fixme: */
/* NB! We expect value to be length IN BYTES */

static void
_insert (ECellTextView *text_view, char *string, int value)
{
    CellEdit *edit = text_view->edit;
    char *temp;

    if (value <= 0) return;

    edit->selection_start = MIN (strlen(edit->text), edit->selection_start);

    temp = g_new (gchar, strlen (edit->text) + value + 1);

    strncpy (temp, edit->text, edit->selection_start);
    strncpy (temp + edit->selection_start, string, value);
    strcpy (temp + edit->selection_start + value, edit->text + edit->selection_end);

    g_free (edit->text);

    edit->text = temp;

    edit->selection_start += value;
    edit->selection_end = edit->selection_start;

    g_signal_emit (VIEW_TO_CELL (text_view), signals[TEXT_INSERTED], 0, text_view, edit->selection_end-value, value, edit->row, edit->model_col);
}

static void
capitalize (CellEdit *edit, int start, int end, ETextEventProcessorCaps type)
{
    ECellTextView *text_view = edit->text_view;

    gboolean first = TRUE;
    int character_length = g_utf8_strlen (edit->text + start, start - end);
    const char *p = edit->text + start;
    const char *text_end = edit->text + end;
    char *new_text = g_new0 (char, character_length * 6 + 1);
    char *output = new_text;

    while (p && *p && p < text_end && g_unichar_validate (g_utf8_get_char (p))) {
        gunichar unival = g_utf8_get_char (p);
        gunichar newval = unival;

        switch (type) {
        case E_TEP_CAPS_UPPER:
            newval = g_unichar_toupper (unival);
            break;
        case E_TEP_CAPS_LOWER:
            newval = g_unichar_tolower (unival);
            break;
        case E_TEP_CAPS_TITLE:
            if (g_unichar_isalpha (unival)) {
                if (first)
                    newval = g_unichar_totitle (unival);
                else
                    newval = g_unichar_tolower (unival);
                first = FALSE;
            } else {
                first = TRUE;
            }
            break;
        }
        g_unichar_to_utf8 (newval, output);
        output = g_utf8_next_char (output);

        p = g_utf8_next_char (p);
    }
    *output = 0;

    edit->selection_end = end;
    edit->selection_start = start;
    _delete_selection (text_view);

    _insert (text_view, new_text, output - new_text);

    g_free (new_text);
}

static void
e_cell_text_view_command (ETextEventProcessor *tep, ETextEventProcessorCommand *command, gpointer data)
{
    CellEdit *edit = (CellEdit *) data;
    ECellTextView *text_view = edit->text_view;
    ECellText *ect = E_CELL_TEXT (text_view->cell_view.ecell);

    gboolean change = FALSE;
    gboolean redraw = FALSE;

    int sel_start, sel_end;
    
    /* If the EText isn't editable, then ignore any commands that would
       modify the text. */
    if (!ect->editable && (command->action == E_TEP_DELETE
                   || command->action == E_TEP_INSERT
                   || command->action == E_TEP_PASTE
                   || command->action == E_TEP_GET_SELECTION))
        return;

    switch (command->action) {
    case E_TEP_MOVE:
        edit->selection_start = _get_position (text_view, command);
        edit->selection_end = edit->selection_start;
        if (edit->timer) {
            g_timer_reset (edit->timer);
        }
        redraw = TRUE;
        break;
    case E_TEP_SELECT:
        edit->selection_end = _get_position (text_view, command);
        sel_start = MIN(edit->selection_start, edit->selection_end);
        sel_end = MAX(edit->selection_start, edit->selection_end);
        if (sel_start != sel_end) {
            e_cell_text_view_supply_selection (edit, command->time, GDK_SELECTION_PRIMARY,
                               edit->text + sel_start,
                               sel_end - sel_start);
        } else if (edit->timer) {
            g_timer_reset (edit->timer);
        }
        redraw = TRUE;
        break;
    case E_TEP_DELETE:
        if (edit->selection_end == edit->selection_start) {
            edit->selection_end = _get_position (text_view, command);
        }
        _delete_selection (text_view);
        if (edit->timer) {
            g_timer_reset (edit->timer);
        }
        redraw = TRUE;
        change = TRUE;
        break;

    case E_TEP_INSERT:
        if (!edit->preedit_length && edit->selection_end != edit->selection_start) {
            _delete_selection (text_view);
        }
        _insert (text_view, command->string, command->value);
        if (edit->timer) {
            g_timer_reset (edit->timer);
        }
        redraw = TRUE;
        change = TRUE;
        break;
    case E_TEP_COPY:
        sel_start = MIN(edit->selection_start, edit->selection_end);
        sel_end = MAX(edit->selection_start, edit->selection_end);
        if (sel_start != sel_end) {
            e_cell_text_view_supply_selection (edit, command->time, clipboard_atom,
                               edit->text + sel_start,
                               sel_end - sel_start);
        }
        if (edit->timer) {
            g_timer_reset (edit->timer);
        }
        break;
    case E_TEP_PASTE:
        e_cell_text_view_get_selection (edit, clipboard_atom, command->time);
        if (edit->timer) {
            g_timer_reset (edit->timer);
        }
        redraw = TRUE;
        change = TRUE;
        break;
    case E_TEP_GET_SELECTION:
        e_cell_text_view_get_selection (edit, GDK_SELECTION_PRIMARY, command->time);
        break;
    case E_TEP_ACTIVATE:
        e_table_item_leave_edit_ (text_view->cell_view.e_table_item_view);
        break;
    case E_TEP_SET_SELECT_BY_WORD:
        edit->select_by_word = command->value;
        break;
    case E_TEP_GRAB:
        edit->actions = E_CELL_GRAB;
        break;
    case E_TEP_UNGRAB:
        edit->actions = E_CELL_UNGRAB;
        break;
    case E_TEP_CAPS:
        if (edit->selection_start == edit->selection_end) {
            capitalize (edit, edit->selection_start, next_word (edit, edit->selection_start), command->value);
        } else {
            int selection_start = MIN (edit->selection_start, edit->selection_end);
            int selection_end = edit->selection_start + edit->selection_end - selection_start; /* Slightly faster than MAX */
            capitalize (edit, selection_start, selection_end, command->value);
        }
        if (edit->timer) {
            g_timer_reset (edit->timer);
        }
        redraw = TRUE;
        change = TRUE;
        break;
    case E_TEP_NOP:
        break;
    }

    if (change) {
        if (edit->layout)
            g_object_unref (edit->layout);
        edit->layout = build_layout (text_view, edit->row, edit->text, edit->cell_width);
    }

    if (!edit->button_down) {
        PangoRectangle strong_pos, weak_pos;
        pango_layout_get_cursor_pos (edit->layout, edit->selection_end, &strong_pos, &weak_pos);
        if (strong_pos.x != weak_pos.x ||
            strong_pos.y != weak_pos.y ||
            strong_pos.width != weak_pos.width ||
            strong_pos.height != weak_pos.height) {
            if (show_pango_rectangle (edit, weak_pos))
                redraw = TRUE;
        }
        if (show_pango_rectangle (edit, strong_pos)) {
            redraw = TRUE;
        }
    }

    if (redraw){
        ect_queue_redraw (text_view, edit->view_col, edit->row);
    }
}

static void
e_cell_text_view_supply_selection (CellEdit *edit, guint time, GdkAtom selection, char *data, gint length)
{
#if DO_SELECTION
    GtkClipboard *clipboard;
    
    clipboard = gtk_widget_get_clipboard (GTK_WIDGET (edit->text_view->canvas), selection);
    
    if (selection == GDK_SELECTION_PRIMARY) {
        edit->has_selection = TRUE;
    }

    gtk_clipboard_set_text (clipboard, data, length);
#endif
}

#ifdef DO_SELECTION
static void
paste_received (GtkClipboard *clipboard,
        const gchar  *text,
        gpointer      data)
{
    CellEdit *edit;

    g_return_if_fail (data);

    edit = (CellEdit *) data;

    if (text && g_utf8_validate (text, strlen (text), NULL)) {
        ETextEventProcessorCommand command;
        command.action = E_TEP_INSERT;
        command.position = E_TEP_SELECTION;
        command.string = (char *)text;
        command.value = strlen (text);
        command.time = GDK_CURRENT_TIME;
        e_cell_text_view_command (edit->tep, &command, edit);
    }
}
#endif

static void
e_cell_text_view_get_selection (CellEdit *edit, GdkAtom selection, guint32 time)
{
#if DO_SELECTION
    gtk_clipboard_request_text (gtk_widget_get_clipboard (GTK_WIDGET (edit->text_view->canvas),
                                  selection),
                    paste_received, edit);
#endif
}

static void
_get_tep (CellEdit *edit)
{
    if (!edit->tep) {
        edit->tep = e_text_event_processor_emacs_like_new ();
        g_signal_connect (edit->tep,
                  "command",
                  G_CALLBACK(e_cell_text_view_command),
                  (gpointer) edit);
    }
}

static GdkColor*
e_cell_text_get_color (ECellTextView *cell_view, gchar *color_spec)
{
    ECellText *ect = E_CELL_TEXT (((ECellView*) cell_view)->ecell);
    GdkColormap *colormap;
    GdkColor *color, tmp_color;

    /* If the color spec is NULL we use the default color. */
    if (color_spec == NULL)
        return NULL;

    /* Create the hash table if we haven't already. */
    if (!ect->colors)
        ect->colors = g_hash_table_new (g_str_hash, g_str_equal);

    /* See if we've already allocated the color. Note that we use a
       special value of (GdkColor*) 1 in the hash to indicate that we've
       already tried and failed to allocate the color, so we don't keep
       trying to allocate it. */
    color = g_hash_table_lookup (ect->colors, color_spec);
    if (color == (GdkColor*) 1)
        return NULL;
    if (color)
        return color;

    /* Try to parse the color. */
    if (gdk_color_parse (color_spec, &tmp_color)) {
        colormap = gtk_widget_get_colormap (GTK_WIDGET (cell_view->canvas));

        /* Try to allocate the color. */
        if (gdk_colormap_alloc_color (colormap, &tmp_color, FALSE, TRUE))
            color = gdk_color_copy (&tmp_color);
    }

    g_hash_table_insert (ect->colors, g_strdup (color_spec),
                 color ? color : (GdkColor*) 1);
    return color;
}

/**
 * e_cell_text_set_selection:
 * @cell_view: the given cell view
 * @col: column of the given cell in the view
 * @row: row of the given cell in the view
 * @start: start offset of the selection
 * @end: end offset of the selection
 *
 * Sets the selection of given text cell.
 * If the current editing cell is not the given cell, this function
 * will return FALSE;
 *
 * If success, the [start, end) part of the text will be selected.
 *
 * This API is most likely to be used by a11y implementations.
 * 
 * Returns: whether the action is successful.
 */
gboolean
e_cell_text_set_selection (ECellView *cell_view,
               gint col,
               gint row,
               gint start,
               gint end)
{
    ECellTextView *ectv;
    CellEdit *edit;
    ETextEventProcessorCommand command1, command2;

    ectv = (ECellTextView *)cell_view;
    edit = ectv->edit;
    if (!edit)
        return FALSE;

    if (edit->view_col != col || edit->row != row)
        return FALSE;

    command1.action = E_TEP_MOVE;
    command1.position = E_TEP_VALUE;
    command1.value = start;
    e_cell_text_view_command (edit->tep, &command1, edit);

    command2.action = E_TEP_SELECT;
    command2.position = E_TEP_VALUE;
    command2.value = end;
    e_cell_text_view_command (edit->tep, &command2, edit);

    return TRUE;
}

/**
 * e_cell_text_get_selection:
 * @cell_view: the given cell view
 * @col: column of the given cell in the view
 * @row: row of the given cell in the view
 * @start: a pointer to an int value indicates the start offset of the selection
 * @end: a pointer to an int value indicates the end offset of the selection
 *
 * Gets the selection of given text cell.
 * If the current editing cell is not the given cell, this function
 * will return FALSE;
 *
 * This API is most likely to be used by a11y implementations.
 * 
 * Returns: whether the action is successful.
 */
gboolean
e_cell_text_get_selection (ECellView *cell_view,
               gint col,
               gint row,
               gint *start,
               gint *end)
{
    ECellTextView *ectv;
    CellEdit *edit;

    ectv = (ECellTextView *)cell_view;
    edit = ectv->edit;
    if (!edit)
        return FALSE;

    if (edit->view_col != col || edit->row != row)
        return FALSE;

    if (start)
        *start = edit->selection_start;
    if (end)
        *end = edit->selection_end;
    return TRUE;
}

/**
 * e_cell_text_copy_clipboard:
 * @cell_view: the given cell view
 * @col: column of the given cell in the view
 * @row: row of the given cell in the view
 *
 * Copys the selected text to clipboard.
 *
 * This API is most likely to be used by a11y implementations.
 */
void
e_cell_text_copy_clipboard (ECellView *cell_view, gint col, gint row)
{
    ECellTextView *ectv;
    CellEdit *edit;
    ETextEventProcessorCommand command;

    ectv = (ECellTextView *)cell_view;
    edit = ectv->edit;
    if (!edit)
        return;

    if (edit->view_col != col || edit->row != row)
        return;

    command.action = E_TEP_COPY;
    command.time = GDK_CURRENT_TIME;
    e_cell_text_view_command (edit->tep, &command, edit);
}

/**
 * e_cell_text_paste_clipboard:
 * @cell_view: the given cell view
 * @col: column of the given cell in the view
 * @row: row of the given cell in the view
 *
 * Pastes the text from the clipboardt.
 *
 * This API is most likely to be used by a11y implementations.
 */
void
e_cell_text_paste_clipboard (ECellView *cell_view, gint col, gint row)
{
    ECellTextView *ectv;
    CellEdit *edit;
    ETextEventProcessorCommand command;

    ectv = (ECellTextView *)cell_view;
    edit = ectv->edit;
    if (!edit)
        return;

    if (edit->view_col != col || edit->row != row)
        return;

    command.action = E_TEP_PASTE;
    command.time = GDK_CURRENT_TIME;
    e_cell_text_view_command (edit->tep, &command, edit);
}

/**
 * e_cell_text_delete_selection:
 * @cell_view: the given cell view
 * @col: column of the given cell in the view
 * @row: row of the given cell in the view
 *
 * Deletes the selected text of the cell.
 *
 * This API is most likely to be used by a11y implementations.
 */
void
e_cell_text_delete_selection (ECellView *cell_view, gint col, gint row)
{
    ECellTextView *ectv;
    CellEdit *edit;
    ETextEventProcessorCommand command;

    ectv = (ECellTextView *)cell_view;
    edit = ectv->edit;
    if (!edit)
        return;

    if (edit->view_col != col || edit->row != row)
        return;

    command.action = E_TEP_DELETE;
    command.position = E_TEP_SELECTION;
    e_cell_text_view_command (edit->tep, &command, edit);
}

/**
 * e_cell_text_get_text_by_view:
 * @cell_view: the given cell view
 * @col: column of the given cell in the model
 * @row: row of the given cell in the model
 * 
 * Get the cell's text directly from CellEdit,
 * during editting this cell, the cell's text value maybe inconsistant
 * with the text got from table_model.
 * The caller should free the text after using it.
 *
 * This API is most likely to be used by a11y implementations.
 */
char *
e_cell_text_get_text_by_view (ECellView *cell_view, gint col, gint row)
{
    ECellTextView *ectv;
    CellEdit *edit;
    gchar   *ret, *model_text;

    ectv = (ECellTextView *)cell_view;
    edit = ectv->edit;
    
    if (edit && ectv->edit->row == row && ectv->edit->model_col == col) { /* being editted now */
        ret = g_strdup (edit->text);
    } else{
        model_text = e_cell_text_get_text (E_CELL_TEXT (cell_view->ecell), 
                         cell_view->e_table_model, col, row);
        ret = g_strdup (model_text);
        e_cell_text_free_text (E_CELL_TEXT (cell_view->ecell), model_text);
    }

    return ret;

}