path: root/widgets/table/e-cell-text.c

/* -*- 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/gdkx.h> /* for BlackPixel */
#include <gtk/gtkenums.h>
#include <gtk/gtkentry.h>
#include <gtk/gtkwindow.h>
#include <gtk/gtkinvisible.h>
#include <gtk/gtksignal.h>
#include <gdk/gdkkeysyms.h>
#include <gtk/gtkwidget.h>
#include <libgnomeui/gnome-canvas.h>
#include <libgnomeui/gnome-canvas-rect-ellipse.h>
#include "e-cell-text.h"
#include "gal/util/e-util.h"
#include "gal/widgets/e-canvas.h"
#include "gal/widgets/e-font.h"
#include "gal/widgets/e-unicode.h"
#include "e-table-item.h"
#include "gal/util/e-text-event-processor.h"
#include "gal/e-text/e-text.h"
#include "gal/util/e-text-event-processor-emacs-like.h"
#include "e-table-tooltip.h"

#define d(x)

#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((c))->klass))

/* 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 {
    ARG_0,

    ARG_STRIKEOUT_COLUMN,
    ARG_BOLD_COLUMN,
    ARG_COLOR_COLUMN,
    ARG_EDITABLE,
    ARG_BG_COLOR_COLUMN
};


enum {
    E_SELECTION_PRIMARY,
    E_SELECTION_CLIPBOARD
};

static GdkAtom clipboard_atom = GDK_NONE;

#define PARENT_TYPE e_cell_get_type ()

#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;
    EFont *font;
    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;

typedef struct _CurrentCell{
    ECellTextView *text_view;
    int            width;
    char          *text;
    int            model_col, view_col, row;
    ECellTextLineBreaks *breaks;
    EFontStyle     style;
} CurrentCell;

#define CURRENT_CELL(x) ((CurrentCell *)(x))

struct _CellEdit {
    CurrentCell cell;

    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 */

    GtkWidget *invisible;           /* For selection handling */
    gboolean has_selection;         /* TRUE if we have the selection */
    gchar *primary_selection;       /* Primary selection text */
    gint primary_length;            /* Primary selection text length in BYTES */
    gchar *clipboard_selection;     /* Clipboard selection text */
    gint clipboard_length;          /* Clipboard selection text length in BYTES */

    guint pointer_in : 1;
    guint default_cursor_shown : 1;

    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 GtkWidget *e_cell_text_view_get_invisible (CellEdit *edit);
static void _selection_clear_event (GtkInvisible *invisible,
                    GdkEventSelection *event,
                    CellEdit *edit);
static void _selection_get (GtkInvisible *invisible,
                GtkSelectionData *selection_data,
                guint info,
                guint time_stamp,
                CellEdit *edit);
static void _selection_received (GtkInvisible *invisible,
                 GtkSelectionData *selection_data,
                 guint time,
                 CellEdit *edit);
static int number_of_lines (char *text);
static void split_into_lines (CurrentCell *cell);
static void unref_lines (CurrentCell *cell);
static void calc_line_widths (CurrentCell *cell);
static int get_line_ypos (CurrentCell *cell, struct line *line);
static int get_line_xpos (CurrentCell *cell, struct line *line);
static void _get_tep (CellEdit *edit);

static gint _get_position_from_xy (CurrentCell *cell, gint x, gint y);
static void _get_xy_from_position (CurrentCell *cell, gint position, gint *xp, gint *yp);
static gboolean _blink_scroll_timeout (gpointer data);

static void build_current_cell (CurrentCell *cell, ECellTextView *text_view, int model_col, int view_col, int row);
static void unbuild_current_cell (CurrentCell *cell);
static void calc_ellipsis (ECellTextView *text_view);
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 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;
    CurrentCell *cell = (CurrentCell *) text_view->edit;

    if (!edit)
        return;

    row = cell->row;
    view_col = cell->view_col;
    model_col = cell->model_col;
    
    old_text = edit->old_text;
    text = cell->text;
    if (edit->invisible)
        gtk_widget_unref (edit->invisible);
    if (edit->tep)
        gtk_object_unref (GTK_OBJECT(edit->tep));
    if (edit->primary_selection)
        g_free (edit->primary_selection);
    if (edit->clipboard_selection)
        g_free (edit->clipboard_selection);
    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_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->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;

    g_free (text_view);
}

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

    text_view->i_cursor = gdk_cursor_new (GDK_XTERM);
    
    if (ect->font_name){
        text_view->font = e_font_from_gdk_name (ect->font_name);
    }
    if (!text_view->font){
        gdk_font_ref (GTK_WIDGET (text_view->canvas)->style->font);
        text_view->font = e_font_from_gdk_font (GTK_WIDGET (text_view->canvas)->style->font);
    }
    
    calc_ellipsis (text_view);

    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;

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

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

    if (text_view->font)
        e_font_unref (text_view->font);
    text_view->font = NULL;
    
    if (text_view->stipple)
        gdk_bitmap_unref (text_view->stipple);

    gdk_cursor_destroy (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_colors_free (colormap, &color->pixel, 1, 0);

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

static void
set_style(ECellView *ecell_view, CurrentCell *cell, int row)
{
    EFontStyle style = E_FONT_PLAIN;
    ECellText *ect = E_CELL_TEXT (ecell_view->ecell);

    if (ect->bold_column >= 0 && e_table_model_value_at(ecell_view->e_table_model, ect->bold_column, row))
        style = E_FONT_BOLD;

    cell->style = style;
}

/*
 * 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)
{
    /* New ECellText */
    ECellText *ect = E_CELL_TEXT (ecell_view->ecell);
    ECellTextView *text_view = (ECellTextView *) ecell_view;
    GtkWidget *canvas = GTK_WIDGET (text_view->canvas);
    GdkRectangle rect, *clip_rect;
    struct line *lines;
    int i;
    int xpos, ypos;
    int start_char, end_char;
    int sel_start, sel_end;
    GdkRectangle sel_rect;
    GdkGC *fg_gc;
    EFont *font = text_view->font;
    const int height = e_font_height (text_view->font);
    CellEdit *edit = text_view->edit;
    gboolean edit_display = FALSE;
    ECellTextLineBreaks *linebreaks;
    GdkColor *foreground, *cell_foreground, *cursor_color;
    gchar *color_spec;
    gboolean selected;
    EFontStyle style = E_FONT_PLAIN;

    selected = flags & E_CELL_SELECTED;

    if (edit){
        if ((edit->cell.view_col == view_col) && (edit->cell.row == row)) {
            edit_display = TRUE;
            fg_gc = canvas->style->fg_gc[edit->has_selection ? GTK_STATE_SELECTED : GTK_STATE_ACTIVE];
        } else
            fg_gc = canvas->style->fg_gc[GTK_STATE_ACTIVE];
    } else {
        fg_gc = canvas->style->fg_gc[GTK_STATE_ACTIVE];
    }

    /*
     * Be a nice citizen: clip to the region we are supposed to draw on
     */
    rect.x = x1;
    rect.y = y1;
    rect.width = x2 - x1;
    rect.height = y2 - y1;
    
    gdk_gc_set_clip_rectangle (text_view->gc, &rect);
    gdk_gc_set_clip_rectangle (fg_gc, &rect);
    clip_rect = &rect;

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

    cursor_color = foreground;

    if (ect->color_column != -1 && ! selected) {
        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;

    rect.x = x1;
    rect.y = y1;
    rect.width = x2 - x1;
    rect.height = y2 - y1;
    
    gdk_gc_set_clip_rectangle (text_view->gc, &rect);
    gdk_gc_set_clip_rectangle (fg_gc, &rect);
    clip_rect = &rect;

    if (edit_display){
        CellEdit *edit = text_view->edit;
        CurrentCell *cell = CURRENT_CELL(edit);

        set_style(ecell_view, cell, row);

        style = cell->style;

        cell->width = x2 - x1;
        
        split_into_lines (cell);

        linebreaks = cell->breaks;
        
        lines = linebreaks->lines;
        ypos = get_line_ypos (cell, lines);
        ypos += e_font_ascent (text_view->font);
        ypos -= edit->yofs_edit;

        for (i = 0; i < linebreaks->num_lines; i++) {
            xpos = get_line_xpos (cell, lines);
            xpos -= edit->xofs_edit;

            /* start_char, end_char, sel_start and sel_end are IN BYTES */

            start_char = lines->text - cell->text;
            end_char = start_char + lines->length;

            sel_start = edit->selection_start;
            sel_end = edit->selection_end;

            if (sel_start > sel_end){
                sel_start ^= sel_end;
                sel_end ^= sel_start;
                sel_start ^= sel_end;
            }
            if (sel_start < start_char)
                sel_start = start_char;
            if (sel_end > end_char)
                sel_end = end_char;

            if (sel_start < sel_end){
                sel_rect.x = xpos + x1 + e_font_utf8_text_width (font, style, lines->text, sel_start - start_char);
                sel_rect.y = ypos + y1 - e_font_ascent (font);
                sel_rect.width = e_font_utf8_text_width (font, style,
                                     lines->text + sel_start - start_char,
                                     sel_end - sel_start);
                sel_rect.height = height;
                gtk_paint_flat_box (canvas->style,
                            drawable,

                            edit->has_selection ? GTK_STATE_SELECTED : GTK_STATE_ACTIVE,
                            GTK_SHADOW_NONE,
                            clip_rect,
                            canvas,
                            "text",
                            sel_rect.x,
                            sel_rect.y,
                            sel_rect.width,
                            sel_rect.height);

                e_font_draw_utf8_text (drawable, font, style, text_view->gc, xpos + x1, ypos + y1,
                               lines->text,
                               sel_start - start_char);
                e_font_draw_utf8_text (drawable, font, style, fg_gc,
                               xpos + x1 + e_font_utf8_text_width (font, style, lines->text, sel_start - start_char),
                               ypos + y1,
                               lines->text + sel_start - start_char,
                               sel_end - sel_start);
                e_font_draw_utf8_text (drawable, font, style, text_view->gc,
                               xpos + x1 + e_font_utf8_text_width (font, style, lines->text, sel_end - start_char),
                               ypos + y1,
                               lines->text + sel_end - start_char,
                               end_char - sel_end);
            } else {
                e_font_draw_utf8_text (drawable, font, style, text_view->gc,
                               xpos + x1, ypos + y1,
                               lines->text,
                               lines->length);
            }
            if (edit->selection_start == edit->selection_end &&
                edit->selection_start >= start_char &&
                edit->selection_start <= end_char &&
                edit->show_cursor) {
                gdk_gc_set_foreground (text_view->gc, cursor_color);
                gdk_draw_rectangle (drawable,
                            text_view->gc,
                            TRUE,
                            xpos + x1 + e_font_utf8_text_width (font, style, lines->text, sel_start - start_char),
                            ypos + y1 - e_font_ascent (font),
                            1,
                            height);
            }
            if (ect->strikeout_column >= 0 && e_table_model_value_at(ecell_view->e_table_model, ect->strikeout_column, row)) {
                gdk_draw_rectangle (drawable,
                            text_view->gc,
                            TRUE,
                            x1, ypos + y1 - (e_font_ascent (font) / 2),
                            x2 - x1,
                            1);
            }
            ypos += height;
            lines ++;
        }
        unref_lines (cell);
    } else {
        
        ECellTextLineBreaks *linebreaks;
        CurrentCell cell;
        build_current_cell (&cell, text_view, model_col, view_col, row);
        
        set_style(ecell_view, &cell, row);

        style = cell.style;

        cell.width = x2 - x1;
        
        split_into_lines (&cell);
        
        linebreaks = cell.breaks;
        lines = linebreaks->lines;
        ypos = get_line_ypos (&cell, lines);
        ypos += e_font_ascent (text_view->font);
        
        
        for (i = 0; i < linebreaks->num_lines; i++) {
            xpos = get_line_xpos (&cell, lines);
            if (ect->use_ellipsis && lines->ellipsis_length < lines->length) {
                e_font_draw_utf8_text (drawable, font, style, text_view->gc,
                           xpos + x1, ypos + y1,
                           lines->text,
                           lines->ellipsis_length);
                e_font_draw_utf8_text (drawable, font, style, text_view->gc,
                           xpos + x1 + lines->width - text_view->ellipsis_width[style],
                           ypos + y1,
                           ect->ellipsis ? ect->ellipsis : "...",
                           ect->ellipsis ? strlen (ect->ellipsis) : 3);
            } else {
                e_font_draw_utf8_text (drawable, font, style, text_view->gc,
                           xpos + x1,
                           ypos + y1,
                           lines->text,
                           lines->length);
            }
            if (ect->strikeout_column >= 0 && e_table_model_value_at(ecell_view->e_table_model, ect->strikeout_column, row)) {
                gdk_draw_rectangle (drawable,
                            text_view->gc,
                            TRUE,
                            x1, ypos + y1 - (e_font_ascent (font) / 2),
                            x2 - x1,
                            1);
            }
            ypos += height;
            lines++;
        }
        unref_lines (&cell);
        unbuild_current_cell (&cell);
    }

    gdk_gc_set_clip_rectangle (text_view->gc, NULL);
    gdk_gc_set_clip_rectangle (fg_gc, NULL);
}


/*
 * 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->cell.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;
    CellEdit *edit = text_view->edit;
    GtkWidget *canvas = GTK_WIDGET (text_view->canvas);
    gint return_val = 0;
    CurrentCell cell, *cellptr;
    d(gboolean press = FALSE);

    if (!(flags & E_CELL_EDITING))
        return 0;

    build_current_cell (&cell, text_view, model_col, view_col, row);
    

    if (edit){
        if ((edit->cell.view_col == view_col) && (edit->cell.row == row)) {
            edit_display = TRUE;
            cellptr = CURRENT_CELL(edit);
        } else {
            cellptr = &cell;
        }
    } else {
        cellptr = &cell;
    }

    set_style(ecell_view, cellptr, row);

    e_tep_event.type = event->type;
    switch (event->type) {
    case GDK_FOCUS_CHANGE:
        break;
    case GDK_KEY_PRESS: /* Fall Through */
    case GDK_KEY_RELEASE:
        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;
              cellptr = CURRENT_CELL(edit);
              edit_display = TRUE;
        }       
        if (edit_display) {
            GdkEventKey key = event->key;
            if (key.keyval == GDK_KP_Enter || key.keyval == GDK_Return){
                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);
                edit->actions = 0;
                return_val = e_text_event_processor_handle_event (edit->tep, &e_tep_event);
                *actions = edit->actions;
                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;
            cellptr = CURRENT_CELL(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 (cellptr, button.x, 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 (cellptr, button.x, 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 (cellptr, motion.x, 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;
    }

    unbuild_current_cell (&cell);
    if (return_val)
        return return_val;
#if 0
    if (GNOME_CANVAS_ITEM_CLASS(parent_class)->event)
        return GNOME_CANVAS_ITEM_CLASS(parent_class)->event (item, event);
#endif
    else
        return 0;
    
}

/*
 * ECell::height method
 */
static int
ect_height (ECellView *ecell_view, int model_col, int view_col, int row) 
{
    ECellTextView *text_view = (ECellTextView *) ecell_view;
    EFont *font;
    ECellText *ect = E_CELL_TEXT(ecell_view->ecell);
    gchar *string;
    gint value;
    
    font = text_view->font;

    if (row == -1) {
        value = e_font_height (font) + TEXT_PAD;
    } else {
        string = e_cell_text_get_text(ect, ecell_view->e_table_model, model_col, row);
        value = e_font_height (font) * number_of_lines(string) + TEXT_PAD;
        e_cell_text_free_text(ect, string);
    }

    return value;
}

/*
 * 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_new (CellEdit, 1);
    text_view->edit = edit;

    build_current_cell (CURRENT_CELL(edit), text_view, model_col, view_col, row);
    
    set_style(ecell_view, CURRENT_CELL(edit), row);

    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->invisible = NULL;
    edit->primary_selection = NULL;
    edit->primary_length = 0;
    edit->clipboard_selection = NULL;
    edit->clipboard_length = 0;

    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->cell.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);
        /* FIXME: edit is freed in ect_stop_editing() so I've
           commented this out - Damon. */
        /*unbuild_current_cell (CURRENT_CELL(edit));*/
    } else {
        /*
         * We did invoke this leave edit internally
         */
    }
}

static void
ect_print (ECellView *ecell_view, GnomePrintContext *context, 
       int model_col, int view_col, int row,
       double width, double height)
{
    GnomeFont *font = gnome_font_new ("Helvetica", 12);
    char *string;
    ECellText *ect = E_CELL_TEXT(ecell_view->ecell);
    string = e_cell_text_get_text(ect, ecell_view->e_table_model, model_col, row);
    gnome_print_gsave(context);
    if (gnome_print_moveto(context, 2, 2) == -1)
                /* FIXME */;
    if (gnome_print_lineto(context, width - 2, 2) == -1)
                /* FIXME */;
    if (gnome_print_lineto(context, width - 2, height - 2) == -1)
                /* FIXME */;
    if (gnome_print_lineto(context, 2, height - 2) == -1)
                /* FIXME */;
    if (gnome_print_lineto(context, 2, 2) == -1)
                /* FIXME */;
    if (gnome_print_clip(context) == -1)
                /* FIXME */;
    gnome_print_moveto(context, 2, (height - gnome_font_get_ascender(font) + gnome_font_get_descender(font)) / 2);
    gnome_print_setfont(context, font);
    gnome_print_show(context, string);
    gnome_print_grestore(context);
    e_cell_text_free_text(ect, string);
}

static gdouble
ect_print_height (ECellView *ecell_view, GnomePrintContext *context, 
          int model_col, int view_col, int row,
          double width)
{
    return 16;
}

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

    font = text_view->font;
    number_of_rows = e_table_model_row_count (ecell_view->e_table_model);

    for (row = 0; row < number_of_rows; row++) {
        CurrentCell cell;
        struct line *line;
        int width;

        build_current_cell (&cell, text_view, model_col, view_col, row);
        split_into_lines (&cell);
        calc_line_widths (&cell);
        
        line = (struct line *)cell.breaks->lines;
        width = e_font_utf8_text_width (font, cell.style,
                        line->text, line->length);
        max_width = MAX (max_width, width);
        unref_lines (&cell);
        unbuild_current_cell (&cell);
    }
    
    return max_width;
}

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;
        gtk_signal_emit_by_name (GTK_OBJECT (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));
        gtk_signal_emit_by_name (GTK_OBJECT (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;
    CurrentCell cell;
    struct line *lines;
    GtkWidget *canvas;
    int i;
    gdouble max_width;
    gboolean cut_off;
    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;
    double text_height;
    ECellText *ect = E_CELL_TEXT(ecell_view->ecell);
    GtkWidget *window;

    tooltip->timer = 0;

    build_current_cell (&cell, text_view, model_col, view_col, row);

    set_style(ecell_view, &cell, row);

    cell.width = col_width - 8;
    split_into_lines (&cell);
    calc_line_widths (&cell);

    cut_off = FALSE;
    for (lines = cell.breaks->lines, i = 0; i < cell.breaks->num_lines;
         lines++, i++) {
        if (lines->length > lines->ellipsis_length) {
            cut_off = TRUE;
            break;
        }
    }

    if (!cut_off) {
        tooltip->timer = 0;
        unref_lines (&cell);
        unbuild_current_cell (&cell);
        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);

    max_width = 0.0;
    for (lines = cell.breaks->lines, i = 0; i < cell.breaks->num_lines;
         lines++, i++) {
        gdouble line_width;

        line_width = e_font_utf8_text_width (text_view->font, 
                             cell.style, lines->text,
                             lines->length);
        max_width = MAX (max_width, line_width);
    }

    text_height = e_font_height (text_view->font) * cell.breaks->num_lines + 4;
    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) max_width + 4,
                      "y2", (double) text_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,
/*                            "font_gdk", text_view->font, */
                          "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),
                          "fill_color_gdk", tooltip->foreground,
                          "text", cell.text,
                          "editable", FALSE,
                          "clip_width", max_width,
                          "clip_height", (double) text_height,
                          "clip", TRUE,
                          "line_wrap", FALSE,
                          "justification", E_CELL_TEXT (text_view->cell_view.ecell)->justify,
                          "draw_background", FALSE,
                          NULL);

    tooltip_width = max_width;
    tooltip_height = text_height;
    tooltip_y = 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_usize (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);
    gtk_signal_connect (GTK_OBJECT (window), "event",
                GTK_SIGNAL_FUNC (tooltip_event), tooltip);

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

    unref_lines (&cell);
    unbuild_current_cell (&cell);

    return;
}

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

    g_free (ect->font_name);

    GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
/* Set_arg handler for the text item */
static void
ect_set_arg (GtkObject *object, GtkArg *arg, guint arg_id)
{
    ECellText *text;

    text = E_CELL_TEXT (object);

    switch (arg_id) {
    case ARG_STRIKEOUT_COLUMN:
        text->strikeout_column = GTK_VALUE_INT (*arg);
        break;

    case ARG_BOLD_COLUMN:
        text->bold_column = GTK_VALUE_INT (*arg);
        break;

    case ARG_COLOR_COLUMN:
        text->color_column = GTK_VALUE_INT (*arg);
        break;

    case ARG_EDITABLE:
        text->editable = GTK_VALUE_BOOL (*arg) ? TRUE : FALSE;
        break;

    case ARG_BG_COLOR_COLUMN:
        text->bg_color_column = GTK_VALUE_INT (*arg);
        break;

    default:
        return;
    }
}

/* Get_arg handler for the text item */
static void
ect_get_arg (GtkObject *object, GtkArg *arg, guint arg_id)
{
    ECellText *text;

    text = E_CELL_TEXT (object);

    switch (arg_id) {
    case ARG_STRIKEOUT_COLUMN:
        GTK_VALUE_INT (*arg) = text->strikeout_column;
        break;

    case ARG_BOLD_COLUMN:
        GTK_VALUE_INT (*arg) = text->bold_column;
        break;

    case ARG_COLOR_COLUMN:
        GTK_VALUE_INT (*arg) = text->color_column;
        break;

    case ARG_EDITABLE:
        GTK_VALUE_BOOL (*arg) = text->editable ? TRUE : FALSE;
        break;

    case ARG_BG_COLOR_COLUMN:
        GTK_VALUE_INT (*arg) = text->bg_color_column;
        break;

    default:
        arg->type = GTK_TYPE_INVALID;
        break;
    }
}

static void
e_cell_text_class_init (GtkObjectClass *object_class)
{
    ECellClass *ecc = (ECellClass *) object_class;
    ECellTextClass *ectc = (ECellTextClass *) object_class;

    object_class->destroy = ect_destroy;

    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->print      = ect_print;
    ecc->print_height = ect_print_height;
    ecc->max_width = ect_max_width;
    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_arg = ect_get_arg;
    object_class->set_arg = ect_set_arg;

    parent_class = gtk_type_class (PARENT_TYPE);

    gtk_object_add_arg_type ("ECellText::strikeout_column",
                 GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_STRIKEOUT_COLUMN);
    gtk_object_add_arg_type ("ECellText::bold_column",
                 GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_BOLD_COLUMN);
    gtk_object_add_arg_type ("ECellText::color_column",
                 GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_COLOR_COLUMN);
    gtk_object_add_arg_type ("ECellText::editable",
                 GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_EDITABLE);
    gtk_object_add_arg_type ("ECellText::bg_color_column",
                 GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_BG_COLOR_COLUMN);

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

static void
e_cell_text_init (ECellText *ect)
{
    ect->ellipsis = NULL;
    ect->use_ellipsis = TRUE;
    ect->strikeout_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: font to be used to render on the screen
 * @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)
{
    cell->font_name = g_strdup (fontname);
    cell->justify = justify;
    return E_CELL(cell);
}

/**
 * e_cell_text_new:
 * @fontname: font to be used to render on the screen
 * @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, bold, and color.
 *
 * The arguments "strikeout_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 = gtk_type_new (e_cell_text_get_type ());

    e_cell_text_construct(ect, fontname, justify);

    return (ECell *) ect;
}

/* Calculates the x position of the specified line of text, based on the text's justification */
static int
get_line_xpos (CurrentCell *cell, struct line *line)
{
    int x;
    
    ECellTextView *text_view = cell->text_view;
    ECellText *ect = E_CELL_TEXT (((ECellView *)cell->text_view)->ecell);
    
    x = text_view->xofs + ect->x;

    switch (ect->justify) {
    case GTK_JUSTIFY_RIGHT:
        x += cell->width - line->width;
        break;

    case GTK_JUSTIFY_CENTER:
        x += (cell->width - line->width) / 2;
        break;

    default:
        /* For GTK_JUSTIFY_LEFT, we don't have to do anything.  We do not support
         * GTK_JUSTIFY_FILL, yet.
         */
        break;
    }

    return x;
}

/* Calculates the x position of the specified line of text, based on the text's justification */
static int
get_line_ypos (CurrentCell *cell, struct line *line)
{
    int y;

    ECellTextView *text_view = cell->text_view;
    ECellText *ect = E_CELL_TEXT (((ECellView *)cell->text_view)->ecell);
    ECellTextLineBreaks *linebreaks = cell->breaks;

    struct line *lines = linebreaks->lines;

    EFont *font;
    
    font = text_view->font;

    y = text_view->yofs + ect->y;
    y += (line - lines) * e_font_height (font);

    return y;
}

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

static void
_get_xy_from_position (CurrentCell *cell, gint position, gint *xp, gint *yp)
{
    if (xp || yp) {
        struct line *lines;
        int x, y;
        int j;
        ECellTextView *text_view = cell->text_view;
        ECellTextLineBreaks *linebreaks;
        EFont *font;
        
        font = text_view->font;
        
        split_into_lines (cell);
        
        linebreaks = cell->breaks;
        lines = linebreaks->lines;

        x = get_line_xpos (cell, lines);
        y = get_line_ypos (cell, lines);
        for (j = 0, lines = linebreaks->lines; j < linebreaks->num_lines; lines++, j++) {
            if (lines->text > cell->text + position)
                break;
            y += e_font_height (font);
        }
        lines --;
        y -= e_font_descent (font);
        
        x += e_font_utf8_text_width (font, cell->style,
                         lines->text,
                         position - (lines->text - cell->text));
        if ((CellEdit *) cell == cell->text_view->edit){
            x -= ((CellEdit *)cell)->xofs_edit;
            y -= ((CellEdit *)cell)->yofs_edit;
        }
        if (xp)
            *xp = x;
        if (yp)
            *yp = y;
        unref_lines (cell);
    }
}

static gint
_get_position_from_xy (CurrentCell *cell, gint x, gint y)
{
    int i, j;
    int xpos, ypos;
    struct line *lines;
    int return_val;
    gchar *p;

    ECellTextView *text_view = cell->text_view;
    ECellTextLineBreaks *linebreaks;
    EFont *font;
    
    font = text_view->font;

    split_into_lines (cell);
    
    linebreaks = cell->breaks;

    lines = linebreaks->lines;

    if ((CellEdit *) cell == cell->text_view->edit){
        x += ((CellEdit *)cell)->xofs_edit;
        y += ((CellEdit *)cell)->yofs_edit;
    }
    
    ypos = get_line_ypos (cell, linebreaks->lines);
    j = 0;
    while (y > ypos) {
        ypos += e_font_height (font);
        j ++;
    }
    j--;
    if (j >= linebreaks->num_lines)
        j = linebreaks->num_lines - 1;
    if (j < 0)
        j = 0;
    i = 0;

    lines += j;
    xpos = get_line_xpos (cell, lines);

    for (p = lines->text; p < lines->text + lines->length && g_unichar_validate (g_utf8_get_char (p)); p = g_utf8_next_char (p)) {
        gint charwidth;

        charwidth = e_font_utf8_char_width (font, cell->style, p);

        xpos += charwidth / 2;
        if (xpos > x) {
            break;
        }
        xpos += (charwidth + 1) / 2;
    }
    
    return_val = p - cell->text;

    unref_lines (cell);

    return return_val;
}

#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;
    CurrentCell *cell = CURRENT_CELL(edit);

    gulong current_time;
    gboolean scroll = FALSE;
    gboolean redraw = FALSE;
    
    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;
    }
    if (scroll && edit->button_down) {
        /* FIXME: Copy this for y. */
        if (edit->lastx - ect->x > cell->width) {
            ECellTextLineBreaks *linebreaks;
            split_into_lines (cell);
            linebreaks = cell->breaks;
            if (edit->xofs_edit < linebreaks->max_width - cell->width) {
                edit->xofs_edit += 4;
                if (edit->xofs_edit > linebreaks->max_width - cell->width + 1)
                    edit->xofs_edit = linebreaks->max_width - cell->width + 1;
                redraw = TRUE;
            }
            unref_lines (cell);
        }
        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 (cell, 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->cell.view_col, edit->cell.row);
    }
    return TRUE;
}

static int
_get_position (ECellTextView *text_view, ETextEventProcessorCommand *command)
{
    int length;
    int x, y;
    CellEdit *edit = text_view->edit;
    CurrentCell *cell = CURRENT_CELL(edit);
    EFont *font;
    gchar *p;
    int unival;
    
    font = text_view->font;
    
    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 (cell->text);

    case E_TEP_START_OF_LINE:

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

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

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

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

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

        return 0;

    case E_TEP_END_OF_LINE:

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

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

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

        return p - cell->text;

    case E_TEP_FORWARD_CHARACTER:

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

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

        return p - cell->text;

    case E_TEP_BACKWARD_CHARACTER:

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

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

        if (p == NULL) return 0;

        return p - cell->text;

    case E_TEP_FORWARD_WORD:

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

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

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

        return p - cell->text;

    case E_TEP_BACKWARD_WORD:

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

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

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

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

        while (p && p > cell->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) - cell->text);
            }
            p = g_utf8_find_prev_char (cell->text, p);
        }

        return 0;

    case E_TEP_FORWARD_LINE:
        _get_xy_from_position (cell, edit->selection_end, &x, &y);
        y += e_font_height (font);
        return _get_position_from_xy (cell, x, y);
    case E_TEP_BACKWARD_LINE:
        _get_xy_from_position (cell, edit->selection_end, &x, &y);
        y -= e_font_height (font);
        return _get_position_from_xy (cell, x, y);

    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;
    CurrentCell *cell = CURRENT_CELL(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 = cell->text + edit->selection_start;
    ep = cell->text + edit->selection_end;
    length = strlen (ep) + 1;

    memmove (sp, ep, length);

    edit->selection_end = edit->selection_start;
}

/* 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;
    CurrentCell *cell = CURRENT_CELL(edit);
    char *temp;

    if (value <= 0) return;

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

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

    g_free (cell->text);

    cell->text = temp;

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

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

    gboolean change = FALSE;
    gboolean redraw = FALSE;

    int sel_start, sel_end;
    EFont *font;
    
    font = text_view->font;

    /* 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,
                               cell->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->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,
                               cell->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_NOP:
        break;
    }

    if (!edit->button_down) {
        int x;
        int i;
        struct line *lines;
        ECellTextLineBreaks *linebreaks;
        
        split_into_lines (cell);
        
        linebreaks = cell->breaks;
    
        for (lines = linebreaks->lines, i = 0; i < linebreaks->num_lines ; i++, lines ++) {
            if ((lines->text - cell->text) > edit->selection_end) {
                break;
            }
        }
        lines --;
        x = e_font_utf8_text_width (font, cell->style,
                        lines->text,
                        edit->selection_end - (lines->text - cell->text));
        

        if (x < edit->xofs_edit) {
            edit->xofs_edit = x;
            redraw = TRUE;
        }

        if (2 + x - cell->width > edit->xofs_edit) {
            edit->xofs_edit = 2 + x - cell->width;
            redraw = TRUE;
        }
        unref_lines (cell);
    }

    if (redraw){
        ect_queue_redraw (text_view, edit->cell.view_col, edit->cell.row);
    }
#if 0
    gnome_canvas_item_request_update (GNOME_CANVAS_ITEM(text));
#endif
}

static void _invisible_destroy (GtkInvisible *invisible,
                CellEdit *edit)
{
    edit->invisible = NULL;
}

static GtkWidget *e_cell_text_view_get_invisible (CellEdit *edit)
{   
    GtkWidget *invisible;
    if (edit->invisible) {
        invisible = edit->invisible;
    } else {
        invisible = gtk_invisible_new ();
        edit->invisible = invisible;
        
        gtk_selection_add_target (invisible,
                      GDK_SELECTION_PRIMARY,
                      GDK_SELECTION_TYPE_STRING,
                      E_SELECTION_PRIMARY);
        gtk_selection_add_target (invisible,
                      clipboard_atom,
                      GDK_SELECTION_TYPE_STRING,
                      E_SELECTION_CLIPBOARD);
        
        gtk_signal_connect (GTK_OBJECT(invisible), "selection_get",
                    GTK_SIGNAL_FUNC (_selection_get), 
                    edit);
        gtk_signal_connect (GTK_OBJECT(invisible), "selection_clear_event",
                    GTK_SIGNAL_FUNC (_selection_clear_event),
                    edit);
        gtk_signal_connect (GTK_OBJECT(invisible), "selection_received",
                    GTK_SIGNAL_FUNC (_selection_received),
                    edit);
        
        gtk_signal_connect (GTK_OBJECT(invisible), "destroy",
                    GTK_SIGNAL_FUNC (_invisible_destroy),
                    edit);
    }
    return invisible;
}

static void
_selection_clear_event (GtkInvisible *invisible,
            GdkEventSelection *event,
            CellEdit *edit)
{
    if (event->selection == GDK_SELECTION_PRIMARY) {
        g_free (edit->primary_selection);
        edit->primary_selection = NULL;
        edit->primary_length = 0;

        edit->has_selection = FALSE;
#if 0
        gnome_canvas_item_request_update (GNOME_CANVAS_ITEM(text));
#endif

    } else if (event->selection == clipboard_atom) {
        g_free (edit->clipboard_selection);
        edit->clipboard_selection = NULL;
        edit->clipboard_length = 0;
    }
}

static void
_selection_get (GtkInvisible *invisible,
        GtkSelectionData *selection_data,
        guint info,
        guint time_stamp,
        CellEdit *edit)
{
    switch (info) {
    case E_SELECTION_PRIMARY:
        gtk_selection_data_set (selection_data, GDK_SELECTION_TYPE_STRING,
                    8, edit->primary_selection, edit->primary_length);
        break;
    case E_SELECTION_CLIPBOARD:
        gtk_selection_data_set (selection_data, GDK_SELECTION_TYPE_STRING,
                    8, edit->clipboard_selection, edit->clipboard_length);
        break;
    }
}

/* fixme: What happens, if delivered string is not UTF-8? */

static void
_selection_received (GtkInvisible *invisible,
             GtkSelectionData *selection_data,
             guint time,
             CellEdit *edit)
{
    if (selection_data->length < 0 || selection_data->type != GDK_SELECTION_TYPE_STRING) {
        return;
    } else {
        ETextEventProcessorCommand command;
        command.action = E_TEP_INSERT;
        command.position = E_TEP_SELECTION;
        command.string = selection_data->data;
        command.value = selection_data->length;
        command.time = time;
        e_cell_text_view_command (edit->tep, &command, edit);
    }
}

static void
e_cell_text_view_supply_selection (CellEdit *edit, guint time, GdkAtom selection, char *data, gint length)
{
    gboolean successful;
    GtkWidget *invisible;

    invisible = e_cell_text_view_get_invisible (edit);

    if (selection == GDK_SELECTION_PRIMARY){
        if (edit->primary_selection) {
            g_free (edit->primary_selection);
        }
        edit->primary_selection = g_strndup (data, length);
        edit->primary_length = length;
    } else if (selection == clipboard_atom) {
        if (edit->clipboard_selection) {
            g_free (edit->clipboard_selection);
        }
        edit->clipboard_selection = g_strndup (data, length);
        edit->clipboard_length = length;
    }

    successful = gtk_selection_owner_set (invisible,
                          selection,
                          time);
    
    if (selection == GDK_SELECTION_PRIMARY)
        edit->has_selection = successful;
}

static void
e_cell_text_view_get_selection (CellEdit *edit, GdkAtom selection, guint32 time)
{
    GtkWidget *invisible;
    invisible = e_cell_text_view_get_invisible (edit);
    gtk_selection_convert (invisible,
                  selection,
                  GDK_SELECTION_TYPE_STRING,
                  time);
}

static void
_get_tep (CellEdit *edit)
{
    if (!edit->tep) {
        edit->tep = e_text_event_processor_emacs_like_new ();
        gtk_object_ref (GTK_OBJECT (edit->tep));
        gtk_object_sink (GTK_OBJECT (edit->tep));
        gtk_signal_connect (GTK_OBJECT(edit->tep),
                   "command",
                   GTK_SIGNAL_FUNC(e_cell_text_view_command),
                   (gpointer) edit);
    }
}

static int
number_of_lines (char *text)
{
    int num_lines = 0;
    gchar *p;

    if (!text) return 0;

    for (p = text; *p && g_unichar_validate (g_utf8_get_char (p)); p = g_utf8_next_char (p)) {
        if (*p == '\n') num_lines++;
    }
    
    num_lines++;
    return num_lines;
}

/* Splits the text of the text item into lines */
static void
split_into_lines (CurrentCell *cell)
{
    char *p;
    struct line *lines;
    gint len;

    char *text = cell->text;
    ECellTextLineBreaks *linebreaks;

    if (! cell->breaks) {
        cell->breaks = g_new (ECellTextLineBreaks, 1);
        cell->breaks->ref_count = 1;
    } else {
        cell->breaks->ref_count ++;
        return;
    }
    linebreaks = cell->breaks;

    /* Check if already split. */
    linebreaks->lines = NULL;
    linebreaks->num_lines = 0;
    
    if (!text)
        return;
    
    /* First, count the number of lines */

    linebreaks->num_lines = number_of_lines(cell->text);
    
    /* Allocate array of lines and calculate split positions */
    
    linebreaks->lines = lines = g_new0 (struct line, linebreaks->num_lines);

    len = 0;
    for (p = text; *p && g_unichar_validate (g_utf8_get_char (p)); p = g_utf8_next_char (p)) {
        if (len == 0) lines->text = p;
        if (*p == '\n') {
            lines->length = p - lines->text;
            lines++;
            len = 0;
        } else
            len++;
    }
    
    if (len == 0)
        lines->text = p;
    lines->length = p - lines->text;

    calc_line_widths (cell);
}

/* Free lines structure. */
static void
unref_lines (CurrentCell *cell)
{
    if (cell->breaks){
        cell->breaks->ref_count --;
        if (cell->breaks->ref_count <= 0){
            g_free (cell->breaks->lines);
            g_free (cell->breaks);
            cell->breaks = NULL;
        }
    }
}

static void
calc_ellipsis (ECellTextView *text_view)
{
    ECellText *ect = E_CELL_TEXT (((ECellView *)text_view)->ecell);
    EFont *font;
    
    font = text_view->font;
    if (font) {
        text_view->ellipsis_width[E_FONT_PLAIN] =
            e_font_utf8_text_width (font, E_FONT_PLAIN,
                    ect->ellipsis ? ect->ellipsis : "...",
                    ect->ellipsis ? strlen (ect->ellipsis) : 3);
        text_view->ellipsis_width[E_FONT_BOLD] =
            e_font_utf8_text_width (font, E_FONT_BOLD,
                    ect->ellipsis ? ect->ellipsis : "...",
                    ect->ellipsis ? strlen (ect->ellipsis) : 3);
    }
}

/* Calculates the line widths (in pixels) of the text's splitted lines */
static void
calc_line_widths (CurrentCell *cell)
{
    ECellTextView *text_view = cell->text_view;
    ECellText *ect = E_CELL_TEXT (((ECellView *)text_view)->ecell);
    ECellTextLineBreaks *linebreaks = cell->breaks;
    struct line *lines;
    int i;
    int j;
    EFont *font;
    
    font = text_view->font;
    
    lines = linebreaks->lines;
    linebreaks->max_width = 0;

    if (!lines) return;

    for (i = 0; i < linebreaks->num_lines; i++) {
        if (lines->length != 0) {
            if (font) {
                lines->width = e_font_utf8_text_width (font, cell->style,
                                       lines->text, lines->length);
                lines->ellipsis_length = 0;
            } else {
                lines->width = 0;
            }
            
            if (ect->use_ellipsis &&
                (!(text_view->edit &&
                   cell->row == text_view->edit->cell.row &&
                   cell->view_col == text_view->edit->cell.view_col)) &&
                lines->width > cell->width) {
                if (font) {
                    lines->ellipsis_length = 0;
                    for (j = 0; j < lines->length; j++){
                        if (e_font_utf8_text_width (font, cell->style, lines->text, j) +
                            text_view->ellipsis_width[cell->style] < cell->width) {
                            lines->ellipsis_length = j;
                        }
                        else
                            break;
                    }
                }
                else
                    lines->ellipsis_length = 0;
                lines->width = e_font_utf8_text_width (font, cell->style, lines->text, lines->ellipsis_length) +
                    text_view->ellipsis_width[cell->style];
            }
            else
                lines->ellipsis_length = lines->length;

            if (lines->width > linebreaks->max_width)
                linebreaks->max_width = lines->width;
        } else {
            lines->width = 0;
            lines->ellipsis_length = 0;
        }

        lines++;
    }
}

static void
build_current_cell (CurrentCell *cell, ECellTextView *text_view, int model_col, int view_col, int row)
{
    ECellView *ecell_view = (ECellView *) text_view;
    ECellText *ect = E_CELL_TEXT (ecell_view->ecell);
    char *temp;

    cell->text_view = text_view;
    cell->model_col = model_col;
    cell->view_col = view_col;
    cell->row = row;
    cell->breaks = NULL;

    temp = e_cell_text_get_text(ect, ecell_view->e_table_model, model_col, row);
    cell->text = g_strdup(temp);
    e_cell_text_free_text(ect, temp);

    cell->width = e_table_header_get_column (
        ((ETableItem *)ecell_view->e_table_item_view)->header,
        view_col)->width - 8;
    cell->style = 0;
}

static void
unbuild_current_cell (CurrentCell *cell)
{
    g_free(cell->text);
    cell->text = NULL;
}


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_color_alloc (colormap, &tmp_color))
            color = gdk_color_copy (&tmp_color);
    }

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