path: root/a11y/e-table/gal-a11y-e-cell-text.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Authors: 
 *   Christopher James Lahey <clahey@ximian.com>
 *
 * Copyright (C) 2002 Ximian, Inc.
 */

#include <config.h>
#include <string.h>
#include "gal-a11y-e-cell-text.h"
#include "gal-a11y-util.h"
#include <gal/e-table/e-cell-text.h>
#include <atk/atkobject.h>
#include <atk/atktext.h>
#include <atk/atkeditabletext.h>
#include <atk/atkaction.h>

#define CS_CLASS(a11y) (G_TYPE_INSTANCE_GET_CLASS ((a11y), C_TYPE_STREAM, GalA11yECellTextClass))
static AtkObjectClass *parent_class;
#define PARENT_TYPE (gal_a11y_e_cell_get_type ())

/* Static functions */
static G_CONST_RETURN gchar*
ect_get_name (AtkObject * a11y)
{
    GalA11yECell *gaec = GAL_A11Y_E_CELL (a11y);
    ECellText *ect = E_CELL_TEXT (gaec->cell_view->ecell);
    return e_cell_text_get_text (ect, gaec->item->table_model, gaec->model_col, gaec->row);
}

static gchar *
ect_get_text (AtkText *text,
          gint start_offset,
          gint end_offset)
{
    GalA11yECell *gaec = GAL_A11Y_E_CELL (text);
    ECellText *ect = E_CELL_TEXT (gaec->cell_view->ecell);
    gchar *ret_val;
    gchar *full_text = e_cell_text_get_text (ect, gaec->item->table_model, gaec->model_col, gaec->row);

    if (end_offset == -1)
        end_offset = strlen (full_text);
    else
        end_offset = g_utf8_offset_to_pointer (full_text, end_offset) - full_text;

    start_offset = g_utf8_offset_to_pointer (full_text, start_offset) - full_text;

    ret_val = g_strndup (full_text + start_offset, end_offset - start_offset);

    e_cell_text_free_text (ect, full_text);

    return ret_val;
}

static gchar *
ect_get_text_after_offset (AtkText *text,
               gint offset,
               AtkTextBoundary boundary_type,
               gint *start_offset,
               gint *end_offset)
{
    /* Unimplemented */
    return NULL;
}

static gchar *
ect_get_text_at_offset (AtkText *text,
            gint offset,
            AtkTextBoundary boundary_type,
            gint *start_offset,
            gint *end_offset)
{
    /* Unimplemented */
    return NULL;
}

static gunichar
ect_get_character_at_offset (AtkText *text,
                 gint offset)
{
    GalA11yECell *gaec = GAL_A11Y_E_CELL (text);
    ECellText *ect = E_CELL_TEXT (gaec->cell_view->ecell);
    gunichar ret_val;
    gchar *at_offset;
    gchar *full_text = e_cell_text_get_text (ect, gaec->item->table_model, gaec->model_col, gaec->row);
    at_offset = g_utf8_offset_to_pointer (full_text, offset);
    ret_val = g_utf8_get_char_validated (at_offset, -1);
    e_cell_text_free_text (ect, full_text);

    return ret_val;
}


static gchar*
ect_get_text_before_offset (AtkText *text,
                gint offset,
                AtkTextBoundary boundary_type,
                gint *start_offset,
                gint *end_offset)
{
    /* Unimplemented */
    return NULL;
}


static gint
ect_get_caret_offset (AtkText *text)
{
    GalA11yECell *gaec = GAL_A11Y_E_CELL (text);
    ECellText *ect = NULL;
    gint start, end;

    g_return_val_if_fail (gaec && gaec->cell_view && gaec->cell_view->ecell && E_IS_CELL_TEXT (gaec->cell_view->ecell), -1);
    ect = E_CELL_TEXT (gaec->cell_view->ecell);

    if (e_cell_text_get_selection (gaec->cell_view,
                       gaec->view_col, gaec->row,
                       &start, &end)) {
        gchar *full_text = e_cell_text_get_text (ect, gaec->item->table_model, gaec->model_col, gaec->row);
        end = g_utf8_pointer_to_offset (full_text, full_text + end);
        e_cell_text_free_text (ect, full_text);
        
        return end;
    }
    else
        return -1;
}

static AtkAttributeSet*
ect_get_run_attributes (AtkText *text,
            gint offset,
            gint *start_offset,
            gint *end_offset)
{
    /* Unimplemented */
    return NULL;
}


static AtkAttributeSet*
ect_get_default_attributes (AtkText *text)
{
    /* Unimplemented */
    return NULL;
}


static void
ect_get_character_extents (AtkText *text,
               gint offset,
               gint *x,
               gint *y,
               gint *width,
               gint *height,
               AtkCoordType coords)
{
    /* Unimplemented */
}


static gint
ect_get_character_count (AtkText *text)
{
    GalA11yECell *gaec = GAL_A11Y_E_CELL (text);
    ECellText *ect = E_CELL_TEXT (gaec->cell_view->ecell);
    gint ret_val;

    gchar *full_text = e_cell_text_get_text (ect, gaec->item->table_model, gaec->model_col, gaec->row);

    ret_val = g_utf8_strlen (full_text, -1);
    e_cell_text_free_text (ect, full_text);
    return ret_val;
}


static gint
ect_get_offset_at_point (AtkText *text,
             gint x,
             gint y,
             AtkCoordType coords)
{
    /* Unimplemented */
    return 0;
}


static gint 
ect_get_n_selections (AtkText *text)
{
    GalA11yECell *gaec = GAL_A11Y_E_CELL (text);
    gint selection_start, selection_end;
    if (e_cell_text_get_selection (gaec->cell_view,
                       gaec->view_col, gaec->row,
                       &selection_start,
                       &selection_end)
        && selection_start != selection_end)
        return 1;
    return 0;
}


static gchar*
ect_get_selection (AtkText *text,
           gint selection_num,
           gint *start_offset,
           gint *end_offset)
{
    GalA11yECell *gaec = GAL_A11Y_E_CELL (text);
    ECellText *ect = E_CELL_TEXT (gaec->cell_view->ecell);
    gchar *ret_val;
    gint selection_start, selection_end;

    if (selection_num == 0
        && e_cell_text_get_selection (gaec->cell_view,
                      gaec->view_col, gaec->row,
                      &selection_start,
                      &selection_end)
        && selection_start != selection_end) {
        gint real_start, real_end, len;
        gchar *full_text = e_cell_text_get_text (ect, gaec->item->table_model, gaec->model_col, gaec->row);
        len = strlen (full_text);
        real_start = MIN (selection_start, selection_end);
        real_end   = MAX (selection_start, selection_end);
        real_start = MIN (MAX (0, real_start), len);
        real_end   = MIN (MAX (0, real_end), len);

        ret_val = g_strndup (full_text + real_start, real_end - real_start);

        real_start = g_utf8_pointer_to_offset (full_text, full_text + real_start);
        real_end   = g_utf8_pointer_to_offset (full_text, full_text + real_end);

        if (start_offset)
            *start_offset = real_start;
        if (end_offset)
            *end_offset = real_end;
        e_cell_text_free_text (ect, full_text);
    } else {
        if (start_offset)
            *start_offset = 0;
        if (end_offset)
            *end_offset = 0;
        ret_val = NULL;
    }

    return ret_val;
}


static gboolean
ect_add_selection (AtkText *text,
           gint start_offset,
           gint end_offset)
{
    GalA11yECell *gaec = GAL_A11Y_E_CELL (text);
    ECellText *ect = E_CELL_TEXT (gaec->cell_view->ecell);

    if (start_offset != end_offset) {
        gint real_start, real_end, len;
        gchar *full_text =
            e_cell_text_get_text (ect, gaec->item->table_model, gaec->model_col, gaec->row);

        len = g_utf8_strlen (full_text, -1);
        if (end_offset == -1)
            end_offset = len;

        real_start = MIN (start_offset, end_offset);
        real_end   = MAX (start_offset, end_offset);
        
        real_start = MIN (MAX (0, real_start), len);
        real_end   = MIN (MAX (0, real_end), len);

        real_start = g_utf8_offset_to_pointer (full_text, real_start) - full_text;
        real_end   = g_utf8_offset_to_pointer (full_text, real_end) - full_text;
        e_cell_text_free_text (ect, full_text);

        if (e_cell_text_set_selection (gaec->cell_view,
                           gaec->view_col, gaec->row,
                           real_start, real_end)) {
            g_signal_emit_by_name (ATK_OBJECT(text), "text_selection_changed");
            return TRUE;
        }
    }

    return FALSE;
}


static gboolean
ect_remove_selection (AtkText *text,
              gint selection_num)
{
    GalA11yECell *gaec = GAL_A11Y_E_CELL (text);
    gint selection_start, selection_end;

    if (selection_num == 0
        && e_cell_text_get_selection (gaec->cell_view,
                      gaec->view_col, gaec->row,
                      &selection_start,
                      &selection_end)
        && selection_start != selection_end 
        && e_cell_text_set_selection (gaec->cell_view,
                      gaec->view_col, gaec->row,
                      selection_end, selection_end)) {
        g_signal_emit_by_name (ATK_OBJECT(text), "text_selection_changed");
        return TRUE;
    }
    else
        return FALSE;
}


static gboolean
ect_set_selection (AtkText *text,
           gint selection_num,
           gint start_offset,
           gint end_offset)
{
    if (selection_num == 0) {
        atk_text_add_selection (text, start_offset, end_offset);
        return TRUE;
    }
    else
        return FALSE;
}


static gboolean
ect_set_caret_offset (AtkText *text,
              gint offset)
{
    GalA11yECell *gaec = GAL_A11Y_E_CELL (text);
    ECellText *ect = E_CELL_TEXT (gaec->cell_view->ecell);
    gchar *full_text;
    gint len;

    full_text = e_cell_text_get_text (ect, gaec->item->table_model, gaec->model_col, gaec->row);

    len = g_utf8_strlen (full_text, -1);
    if (offset == -1)
        offset = len;
    else
        offset = MIN (MAX (0, offset), len);
    
    offset = g_utf8_offset_to_pointer (full_text, offset) - full_text;

    e_cell_text_free_text (ect, full_text);

    return e_cell_text_set_selection (gaec->cell_view,
                      gaec->view_col, gaec->row,
                      offset, offset);
}

static gboolean
ect_set_run_attributes (AtkEditableText *text,
            AtkAttributeSet *attrib_set,
            gint start_offset,
            gint end_offset)
{
    /* Unimplemented */
    return FALSE;
}

static void
ect_set_text_contents (AtkEditableText *text,
               const gchar *string)
{
    GalA11yECell *gaec = GAL_A11Y_E_CELL (text);
    ECellText *ect = E_CELL_TEXT (gaec->cell_view->ecell);

    e_cell_text_set_value (ect, gaec->item->table_model, gaec->model_col, gaec->row, string);
    e_table_item_enter_edit (gaec->item, gaec->view_col, gaec->row);
}

static void
ect_insert_text (AtkEditableText *text,
         const gchar *string,
         gint length,
         gint *position)
{
    /* Utf8 unimplemented */
    GalA11yECell *gaec = GAL_A11Y_E_CELL (text);
    ECellText *ect = E_CELL_TEXT (gaec->cell_view->ecell);

    gchar *full_text = e_cell_text_get_text (ect, gaec->item->table_model, gaec->model_col, gaec->row);
    gchar *result = g_strdup_printf ("%.*s%.*s%s", *position, full_text, length, string, full_text + *position);

    e_cell_text_set_value (ect, gaec->item->table_model, gaec->model_col, gaec->row, result);

    *position += length;

    g_free (result);
    e_cell_text_free_text (ect, full_text);
}

static void
ect_copy_text (AtkEditableText *text,
           gint start_pos,
           gint end_pos)
{
    GalA11yECell *gaec = GAL_A11Y_E_CELL (text);
    if (start_pos != end_pos
        && atk_text_set_selection (ATK_TEXT (text), 0, start_pos, end_pos))
        e_cell_text_copy_clipboard (gaec->cell_view,
                        gaec->view_col, gaec->row);
}

static void
ect_delete_text (AtkEditableText *text,
         gint start_pos,
         gint end_pos)
{
    GalA11yECell *gaec = GAL_A11Y_E_CELL (text);
    if (start_pos != end_pos
        && atk_text_set_selection (ATK_TEXT (text), 0, start_pos, end_pos))
        e_cell_text_delete_selection (gaec->cell_view,
                          gaec->view_col, gaec->row);
}

static void
ect_cut_text (AtkEditableText *text,
          gint start_pos,
          gint end_pos)
{
    ect_copy_text (text, start_pos, end_pos);
    ect_delete_text (text, start_pos, end_pos);
}

static void
ect_paste_text (AtkEditableText *text,
        gint position)
{
    GalA11yECell *gaec = GAL_A11Y_E_CELL (text);

    e_table_item_enter_edit (gaec->item, gaec->view_col, gaec->row);

    if (atk_text_set_caret_offset (ATK_TEXT (text), position))
        e_cell_text_paste_clipboard (gaec->cell_view,
                         gaec->view_col, gaec->row);
}

static void
ect_do_action_edit (AtkAction *action)
{
    GalA11yECell *a11y = GAL_A11Y_E_CELL (action);
    e_table_item_enter_edit (a11y->item, a11y->view_col, a11y->row);
}

static void
ect_atk_text_iface_init (AtkTextIface *iface)
{
    iface->get_text                = ect_get_text;
    iface->get_text_after_offset   = ect_get_text_after_offset;
    iface->get_text_at_offset      = ect_get_text_at_offset;
    iface->get_character_at_offset = ect_get_character_at_offset;
    iface->get_text_before_offset  = ect_get_text_before_offset;
    iface->get_caret_offset        = ect_get_caret_offset;
    iface->get_run_attributes      = ect_get_run_attributes;
    iface->get_default_attributes  = ect_get_default_attributes;
    iface->get_character_extents   = ect_get_character_extents;
    iface->get_character_count     = ect_get_character_count;
    iface->get_offset_at_point     = ect_get_offset_at_point;
    iface->get_n_selections        = ect_get_n_selections;
    iface->get_selection           = ect_get_selection;
    iface->add_selection           = ect_add_selection;
    iface->remove_selection        = ect_remove_selection;
    iface->set_selection           = ect_set_selection;
    iface->set_caret_offset        = ect_set_caret_offset;
}

static void
ect_atk_editable_text_iface_init (AtkEditableTextIface *iface)
{
    iface->set_run_attributes = ect_set_run_attributes;
    iface->set_text_contents  = ect_set_text_contents;
    iface->insert_text        = ect_insert_text;
    iface->copy_text          = ect_copy_text;
    iface->cut_text           = ect_cut_text;
    iface->delete_text        = ect_delete_text;
    iface->paste_text         = ect_paste_text;
}

static void
ect_class_init (GalA11yECellTextClass *klass)
{
    AtkObjectClass *a11y      = ATK_OBJECT_CLASS (klass);   
    parent_class              = g_type_class_ref (PARENT_TYPE);
    a11y->get_name            = ect_get_name;
}

static void
ect_init (GalA11yECellText *a11y)
{
    gal_a11y_e_cell_add_action (GAL_A11Y_E_CELL (a11y),
                    "edit",
                    "begin editing this cell",
                    NULL,
                    (ACTION_FUNC)ect_do_action_edit);
}

/**
 * gal_a11y_e_cell_text_get_type:
 * @void: 
 * 
 * Registers the &GalA11yECellText class if necessary, and returns the type ID
 * associated to it.
 * 
 * Return value: The type ID of the &GalA11yECellText class.
 **/
GType
gal_a11y_e_cell_text_get_type (void)
{
    static GType type = 0;

    if (!type) {
        GTypeInfo info = {
            sizeof (GalA11yECellTextClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) ect_class_init,
            (GClassFinalizeFunc) NULL,
            NULL, /* class_data */
            sizeof (GalA11yECellText),
            0,
            (GInstanceInitFunc) ect_init,
            NULL /* value_cell_text */
        };

        static const GInterfaceInfo atk_text_info = {
            (GInterfaceInitFunc) ect_atk_text_iface_init,
            (GInterfaceFinalizeFunc) NULL,
            NULL
        };

        static const GInterfaceInfo atk_editable_text_info = {
            (GInterfaceInitFunc) ect_atk_editable_text_iface_init,
            (GInterfaceFinalizeFunc) NULL,
            NULL
        };

        type = g_type_register_static (PARENT_TYPE, "GalA11yECellText", &info, 0);
        g_type_add_interface_static (type, ATK_TYPE_TEXT, &atk_text_info);
        g_type_add_interface_static (type, ATK_TYPE_EDITABLE_TEXT, &atk_editable_text_info);
        gal_a11y_e_cell_type_add_action_interface (type);
    }

    return type;
}

AtkObject *
gal_a11y_e_cell_text_new (ETableItem *item,
              ECellView  *cell_view,
              AtkObject  *parent,
              int         model_col,
              int         view_col,
              int         row)
{
    AtkObject *a11y;

    a11y = g_object_new (gal_a11y_e_cell_text_get_type (), NULL);

    gal_a11y_e_cell_construct (a11y,
                   item,
                   cell_view,
                   parent,
                   model_col,
                   view_col,
                   row);
    return a11y;
}