+++ /dev/null
-/* GAIL - The GNOME Accessibility Implementation Library
- * Copyright 2001 Sun Microsystems Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * 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 <stdlib.h>
-#include "gailtextutil.h"
-
-/**
- * SECTION:gailtextutil
- * @Short_description: GailTextUtil is a utility class which can be used to
- * implement some of the #AtkText functions for accessible objects
- * which implement #AtkText.
- * @Title: GailTextUtil
- *
- * GailTextUtil is a utility class which can be used to implement the
- * #AtkText functions which get text for accessible objects which implement
- * #AtkText.
- *
- * In GAIL it is used by the accsesible objects for #GnomeCanvasText, #GtkEntry,
- * #GtkLabel, #GtkCellRendererText and #GtkTextView.
- */
-
-static void gail_text_util_class_init (GailTextUtilClass *klass);
-
-static void gail_text_util_init (GailTextUtil *textutil);
-static void gail_text_util_finalize (GObject *object);
-
-
-static void get_pango_text_offsets (PangoLayout *layout,
- GtkTextBuffer *buffer,
- GailOffsetType function,
- AtkTextBoundary boundary_type,
- gint offset,
- gint *start_offset,
- gint *end_offset,
- GtkTextIter *start_iter,
- GtkTextIter *end_iter);
-static GObjectClass *parent_class = NULL;
-
-GType
-gail_text_util_get_type(void)
-{
- static GType type = 0;
-
- if (!type)
- {
- const GTypeInfo tinfo =
- {
- sizeof (GailTextUtilClass),
- (GBaseInitFunc) NULL, /* base init */
- (GBaseFinalizeFunc) NULL, /* base finalize */
- (GClassInitFunc) gail_text_util_class_init,
- (GClassFinalizeFunc) NULL, /* class finalize */
- NULL, /* class data */
- sizeof(GailTextUtil),
- 0, /* nb preallocs */
- (GInstanceInitFunc) gail_text_util_init,
- NULL, /* value table */
- };
-
- type = g_type_register_static (G_TYPE_OBJECT, "EvGailTextUtil", &tinfo, 0);
- }
- return type;
-}
-
-/**
- * gail_text_util_new:
- *
- * This function creates a new GailTextUtil object.
- *
- * Returns: the GailTextUtil object
- **/
-GailTextUtil*
-gail_text_util_new (void)
-{
- return GAIL_TEXT_UTIL (g_object_new (GAIL_TYPE_TEXT_UTIL, NULL));
-}
-
-static void
-gail_text_util_init (GailTextUtil *textutil)
-{
- textutil->buffer = NULL;
-}
-
-static void
-gail_text_util_class_init (GailTextUtilClass *klass)
-{
- GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
-
- parent_class = g_type_class_peek_parent (klass);
-
- gobject_class->finalize = gail_text_util_finalize;
-}
-
-static void
-gail_text_util_finalize (GObject *object)
-{
- GailTextUtil *textutil = GAIL_TEXT_UTIL (object);
-
- if (textutil->buffer)
- g_object_unref (textutil->buffer);
-
- G_OBJECT_CLASS (parent_class)->finalize (object);
-}
-
-/**
- * gail_text_util_text_setup:
- * @textutil: The #GailTextUtil to be initialized.
- * @text: A gchar* which points to the text to be stored in the GailTextUtil
- *
- * This function initializes the GailTextUtil with the specified character string,
- **/
-void
-gail_text_util_text_setup (GailTextUtil *textutil,
- const gchar *text)
-{
- g_return_if_fail (GAIL_IS_TEXT_UTIL (textutil));
-
- if (textutil->buffer)
- {
- if (!text)
- {
- g_object_unref (textutil->buffer);
- textutil->buffer = NULL;
- return;
- }
- }
- else
- {
- textutil->buffer = gtk_text_buffer_new (NULL);
- }
-
- gtk_text_buffer_set_text (textutil->buffer, text, -1);
-}
-
-/**
- * gail_text_util_buffer_setup:
- * @textutil: A #GailTextUtil to be initialized
- * @buffer: The #GtkTextBuffer which identifies the text to be stored in the GailUtil.
- *
- * This function initializes the GailTextUtil with the specified GtkTextBuffer
- **/
-void
-gail_text_util_buffer_setup (GailTextUtil *textutil,
- GtkTextBuffer *buffer)
-{
- g_return_if_fail (GAIL_IS_TEXT_UTIL (textutil));
-
- textutil->buffer = g_object_ref (buffer);
-}
-
-/**
- * gail_text_util_get_text:
- * @textutil: A #GailTextUtil
- * @layout: A gpointer which is a PangoLayout, a GtkTreeView of NULL
- * @function: An enumeration specifying whether to return the text before, at, or
- * after the offset.
- * @boundary_type: The boundary type.
- * @offset: The offset of the text in the GailTextUtil
- * @start_offset: Address of location in which the start offset is returned
- * @end_offset: Address of location in which the end offset is returned
- *
- * This function gets the requested substring from the text in the GtkTextUtil.
- * The layout is used only for getting the text on a line. The value is NULL
- * for a GtkTextView which is not wrapped, is a GtkTextView for a GtkTextView
- * which is wrapped and is a PangoLayout otherwise.
- *
- * Returns: the substring requested
- **/
-gchar*
-gail_text_util_get_text (GailTextUtil *textutil,
- gpointer layout,
- GailOffsetType function,
- AtkTextBoundary boundary_type,
- gint offset,
- gint *start_offset,
- gint *end_offset)
-{
- GtkTextIter start, end;
- gint line_number;
- GtkTextBuffer *buffer;
-
- g_return_val_if_fail (GAIL_IS_TEXT_UTIL (textutil), NULL);
-
- buffer = textutil->buffer;
- if (buffer == NULL)
- {
- *start_offset = 0;
- *end_offset = 0;
- return NULL;
- }
-
- if (!gtk_text_buffer_get_char_count (buffer))
- {
- *start_offset = 0;
- *end_offset = 0;
- return g_strdup ("");
- }
- gtk_text_buffer_get_iter_at_offset (buffer, &start, offset);
-
-
- end = start;
-
- switch (function)
- {
- case GAIL_BEFORE_OFFSET:
- switch (boundary_type)
- {
- case ATK_TEXT_BOUNDARY_CHAR:
- gtk_text_iter_backward_char(&start);
- break;
- case ATK_TEXT_BOUNDARY_WORD_START:
- if (!gtk_text_iter_starts_word (&start))
- gtk_text_iter_backward_word_start (&start);
- end = start;
- gtk_text_iter_backward_word_start(&start);
- break;
- case ATK_TEXT_BOUNDARY_WORD_END:
- if (gtk_text_iter_inside_word (&start) &&
- !gtk_text_iter_starts_word (&start))
- gtk_text_iter_backward_word_start (&start);
- while (!gtk_text_iter_ends_word (&start))
- {
- if (!gtk_text_iter_backward_char (&start))
- break;
- }
- end = start;
- gtk_text_iter_backward_word_start(&start);
- while (!gtk_text_iter_ends_word (&start))
- {
- if (!gtk_text_iter_backward_char (&start))
- break;
- }
- break;
- case ATK_TEXT_BOUNDARY_SENTENCE_START:
- if (!gtk_text_iter_starts_sentence (&start))
- gtk_text_iter_backward_sentence_start (&start);
- end = start;
- gtk_text_iter_backward_sentence_start (&start);
- break;
- case ATK_TEXT_BOUNDARY_SENTENCE_END:
- if (gtk_text_iter_inside_sentence (&start) &&
- !gtk_text_iter_starts_sentence (&start))
- gtk_text_iter_backward_sentence_start (&start);
- while (!gtk_text_iter_ends_sentence (&start))
- {
- if (!gtk_text_iter_backward_char (&start))
- break;
- }
- end = start;
- gtk_text_iter_backward_sentence_start (&start);
- while (!gtk_text_iter_ends_sentence (&start))
- {
- if (!gtk_text_iter_backward_char (&start))
- break;
- }
- break;
- case ATK_TEXT_BOUNDARY_LINE_START:
- if (layout == NULL)
- {
- line_number = gtk_text_iter_get_line (&start);
- if (line_number == 0)
- {
- gtk_text_buffer_get_iter_at_offset (buffer,
- &start, 0);
- }
- else
- {
- gtk_text_iter_backward_line (&start);
- gtk_text_iter_forward_line (&start);
- }
- end = start;
- gtk_text_iter_backward_line (&start);
- }
- else if GTK_IS_TEXT_VIEW (layout)
- {
- GtkTextView *view = GTK_TEXT_VIEW (layout);
-
- gtk_text_view_backward_display_line_start (view, &start);
- end = start;
- gtk_text_view_backward_display_line (view, &start);
- }
- else if (PANGO_IS_LAYOUT (layout))
- get_pango_text_offsets (PANGO_LAYOUT (layout),
- buffer,
- function,
- boundary_type,
- offset,
- start_offset,
- end_offset,
- &start,
- &end);
- break;
- case ATK_TEXT_BOUNDARY_LINE_END:
- if (layout == NULL)
- {
- line_number = gtk_text_iter_get_line (&start);
- if (line_number == 0)
- {
- gtk_text_buffer_get_iter_at_offset (buffer,
- &start, 0);
- end = start;
- }
- else
- {
- gtk_text_iter_backward_line (&start);
- end = start;
- while (!gtk_text_iter_ends_line (&start))
- {
- if (!gtk_text_iter_backward_char (&start))
- break;
- }
- gtk_text_iter_forward_to_line_end (&end);
- }
- }
- else if GTK_IS_TEXT_VIEW (layout)
- {
- GtkTextView *view = GTK_TEXT_VIEW (layout);
-
- gtk_text_view_backward_display_line_start (view, &start);
- if (!gtk_text_iter_is_start (&start))
- {
- gtk_text_view_backward_display_line (view, &start);
- end = start;
- if (!gtk_text_iter_is_start (&start))
- {
- gtk_text_view_backward_display_line (view, &start);
- gtk_text_view_forward_display_line_end (view, &start);
- }
- gtk_text_view_forward_display_line_end (view, &end);
- }
- else
- {
- end = start;
- }
- }
- else if (PANGO_IS_LAYOUT (layout))
- get_pango_text_offsets (PANGO_LAYOUT (layout),
- buffer,
- function,
- boundary_type,
- offset,
- start_offset,
- end_offset,
- &start,
- &end);
- break;
- }
- break;
-
- case GAIL_AT_OFFSET:
- switch (boundary_type)
- {
- case ATK_TEXT_BOUNDARY_CHAR:
- gtk_text_iter_forward_char (&end);
- break;
- case ATK_TEXT_BOUNDARY_WORD_START:
- if (!gtk_text_iter_starts_word (&start))
- gtk_text_iter_backward_word_start (&start);
- if (gtk_text_iter_inside_word (&end))
- gtk_text_iter_forward_word_end (&end);
- while (!gtk_text_iter_starts_word (&end))
- {
- if (!gtk_text_iter_forward_char (&end))
- break;
- }
- break;
- case ATK_TEXT_BOUNDARY_WORD_END:
- if (gtk_text_iter_inside_word (&start) &&
- !gtk_text_iter_starts_word (&start))
- gtk_text_iter_backward_word_start (&start);
- while (!gtk_text_iter_ends_word (&start))
- {
- if (!gtk_text_iter_backward_char (&start))
- break;
- }
- gtk_text_iter_forward_word_end (&end);
- break;
- case ATK_TEXT_BOUNDARY_SENTENCE_START:
- if (!gtk_text_iter_starts_sentence (&start))
- gtk_text_iter_backward_sentence_start (&start);
- if (gtk_text_iter_inside_sentence (&end))
- gtk_text_iter_forward_sentence_end (&end);
- while (!gtk_text_iter_starts_sentence (&end))
- {
- if (!gtk_text_iter_forward_char (&end))
- break;
- }
- break;
- case ATK_TEXT_BOUNDARY_SENTENCE_END:
- if (gtk_text_iter_inside_sentence (&start) &&
- !gtk_text_iter_starts_sentence (&start))
- gtk_text_iter_backward_sentence_start (&start);
- while (!gtk_text_iter_ends_sentence (&start))
- {
- if (!gtk_text_iter_backward_char (&start))
- break;
- }
- gtk_text_iter_forward_sentence_end (&end);
- break;
- case ATK_TEXT_BOUNDARY_LINE_START:
- if (layout == NULL)
- {
- line_number = gtk_text_iter_get_line (&start);
- if (line_number == 0)
- {
- gtk_text_buffer_get_iter_at_offset (buffer,
- &start, 0);
- }
- else
- {
- gtk_text_iter_backward_line (&start);
- gtk_text_iter_forward_line (&start);
- }
- gtk_text_iter_forward_line (&end);
- }
- else if GTK_IS_TEXT_VIEW (layout)
- {
- GtkTextView *view = GTK_TEXT_VIEW (layout);
-
- gtk_text_view_backward_display_line_start (view, &start);
- /*
- * The call to gtk_text_iter_forward_to_end() is needed
- * because of bug 81960
- */
- if (!gtk_text_view_forward_display_line (view, &end))
- gtk_text_iter_forward_to_end (&end);
- }
- else if PANGO_IS_LAYOUT (layout)
- get_pango_text_offsets (PANGO_LAYOUT (layout),
- buffer,
- function,
- boundary_type,
- offset,
- start_offset,
- end_offset,
- &start,
- &end);
-
- break;
- case ATK_TEXT_BOUNDARY_LINE_END:
- if (layout == NULL)
- {
- line_number = gtk_text_iter_get_line (&start);
- if (line_number == 0)
- {
- gtk_text_buffer_get_iter_at_offset (buffer,
- &start, 0);
- }
- else
- {
- gtk_text_iter_backward_line (&start);
- gtk_text_iter_forward_line (&start);
- }
- while (!gtk_text_iter_ends_line (&start))
- {
- if (!gtk_text_iter_backward_char (&start))
- break;
- }
- gtk_text_iter_forward_to_line_end (&end);
- }
- else if GTK_IS_TEXT_VIEW (layout)
- {
- GtkTextView *view = GTK_TEXT_VIEW (layout);
-
- gtk_text_view_backward_display_line_start (view, &start);
- if (!gtk_text_iter_is_start (&start))
- {
- gtk_text_view_backward_display_line (view, &start);
- gtk_text_view_forward_display_line_end (view, &start);
- }
- gtk_text_view_forward_display_line_end (view, &end);
- }
- else if PANGO_IS_LAYOUT (layout)
- get_pango_text_offsets (PANGO_LAYOUT (layout),
- buffer,
- function,
- boundary_type,
- offset,
- start_offset,
- end_offset,
- &start,
- &end);
- break;
- }
- break;
-
- case GAIL_AFTER_OFFSET:
- switch (boundary_type)
- {
- case ATK_TEXT_BOUNDARY_CHAR:
- gtk_text_iter_forward_char(&start);
- gtk_text_iter_forward_chars(&end, 2);
- break;
- case ATK_TEXT_BOUNDARY_WORD_START:
- if (gtk_text_iter_inside_word (&end))
- gtk_text_iter_forward_word_end (&end);
- while (!gtk_text_iter_starts_word (&end))
- {
- if (!gtk_text_iter_forward_char (&end))
- break;
- }
- start = end;
- if (!gtk_text_iter_is_end (&end))
- {
- gtk_text_iter_forward_word_end (&end);
- while (!gtk_text_iter_starts_word (&end))
- {
- if (!gtk_text_iter_forward_char (&end))
- break;
- }
- }
- break;
- case ATK_TEXT_BOUNDARY_WORD_END:
- gtk_text_iter_forward_word_end (&end);
- start = end;
- if (!gtk_text_iter_is_end (&end))
- gtk_text_iter_forward_word_end (&end);
- break;
- case ATK_TEXT_BOUNDARY_SENTENCE_START:
- if (gtk_text_iter_inside_sentence (&end))
- gtk_text_iter_forward_sentence_end (&end);
- while (!gtk_text_iter_starts_sentence (&end))
- {
- if (!gtk_text_iter_forward_char (&end))
- break;
- }
- start = end;
- if (!gtk_text_iter_is_end (&end))
- {
- gtk_text_iter_forward_sentence_end (&end);
- while (!gtk_text_iter_starts_sentence (&end))
- {
- if (!gtk_text_iter_forward_char (&end))
- break;
- }
- }
- break;
- case ATK_TEXT_BOUNDARY_SENTENCE_END:
- gtk_text_iter_forward_sentence_end (&end);
- start = end;
- if (!gtk_text_iter_is_end (&end))
- gtk_text_iter_forward_sentence_end (&end);
- break;
- case ATK_TEXT_BOUNDARY_LINE_START:
- if (layout == NULL)
- {
- gtk_text_iter_forward_line (&end);
- start = end;
- gtk_text_iter_forward_line (&end);
- }
- else if GTK_IS_TEXT_VIEW (layout)
- {
- GtkTextView *view = GTK_TEXT_VIEW (layout);
-
- gtk_text_view_forward_display_line (view, &end);
- start = end;
- gtk_text_view_forward_display_line (view, &end);
- }
- else if (PANGO_IS_LAYOUT (layout))
- get_pango_text_offsets (PANGO_LAYOUT (layout),
- buffer,
- function,
- boundary_type,
- offset,
- start_offset,
- end_offset,
- &start,
- &end);
- break;
- case ATK_TEXT_BOUNDARY_LINE_END:
- if (layout == NULL)
- {
- gtk_text_iter_forward_line (&start);
- end = start;
- if (!gtk_text_iter_is_end (&start))
- {
- while (!gtk_text_iter_ends_line (&start))
- {
- if (!gtk_text_iter_backward_char (&start))
- break;
- }
- gtk_text_iter_forward_to_line_end (&end);
- }
- }
- else if GTK_IS_TEXT_VIEW (layout)
- {
- GtkTextView *view = GTK_TEXT_VIEW (layout);
-
- gtk_text_view_forward_display_line_end (view, &end);
- start = end;
- gtk_text_view_forward_display_line (view, &end);
- gtk_text_view_forward_display_line_end (view, &end);
- }
- else if (PANGO_IS_LAYOUT (layout))
- get_pango_text_offsets (PANGO_LAYOUT (layout),
- buffer,
- function,
- boundary_type,
- offset,
- start_offset,
- end_offset,
- &start,
- &end);
- break;
- }
- break;
- }
- *start_offset = gtk_text_iter_get_offset (&start);
- *end_offset = gtk_text_iter_get_offset (&end);
-
- return gtk_text_buffer_get_text (buffer, &start, &end, FALSE);
-}
-
-/**
- * gail_text_util_get_substring:
- * @textutil: A #GailTextUtil
- * @start_pos: The start position of the substring
- * @end_pos: The end position of the substring.
- *
- * Gets the substring indicated by @start_pos and @end_pos
- *
- * Returns: the substring indicated by @start_pos and @end_pos
- **/
-gchar*
-gail_text_util_get_substring (GailTextUtil *textutil,
- gint start_pos,
- gint end_pos)
-{
- GtkTextIter start, end;
- GtkTextBuffer *buffer;
-
- g_return_val_if_fail(GAIL_IS_TEXT_UTIL (textutil), NULL);
-
- buffer = textutil->buffer;
- if (buffer == NULL)
- return NULL;
-
- gtk_text_buffer_get_iter_at_offset (buffer, &start, start_pos);
- if (end_pos < 0)
- gtk_text_buffer_get_end_iter (buffer, &end);
- else
- gtk_text_buffer_get_iter_at_offset (buffer, &end, end_pos);
-
- return gtk_text_buffer_get_text (buffer, &start, &end, FALSE);
-}
-
-static void
-get_pango_text_offsets (PangoLayout *layout,
- GtkTextBuffer *buffer,
- GailOffsetType function,
- AtkTextBoundary boundary_type,
- gint offset,
- gint *start_offset,
- gint *end_offset,
- GtkTextIter *start_iter,
- GtkTextIter *end_iter)
-{
- PangoLayoutIter *iter;
- PangoLayoutLine *line, *prev_line = NULL, *prev_prev_line = NULL;
- gint index, start_index, end_index;
- const gchar *text;
- gboolean found = FALSE;
-
- text = pango_layout_get_text (layout);
- index = g_utf8_offset_to_pointer (text, offset) - text;
- iter = pango_layout_get_iter (layout);
- do
- {
- line = pango_layout_iter_get_line (iter);
- start_index = line->start_index;
- end_index = start_index + line->length;
-
- if (index >= start_index && index <= end_index)
- {
- /*
- * Found line for offset
- */
- switch (function)
- {
- case GAIL_BEFORE_OFFSET:
- /*
- * We want the previous line
- */
- if (prev_line)
- {
- switch (boundary_type)
- {
- case ATK_TEXT_BOUNDARY_LINE_START:
- end_index = start_index;
- start_index = prev_line->start_index;
- break;
- case ATK_TEXT_BOUNDARY_LINE_END:
- if (prev_prev_line)
- start_index = prev_prev_line->start_index +
- prev_prev_line->length;
- end_index = prev_line->start_index + prev_line->length;
- break;
- default:
- g_assert_not_reached();
- }
- }
- else
- start_index = end_index = 0;
- break;
- case GAIL_AT_OFFSET:
- switch (boundary_type)
- {
- case ATK_TEXT_BOUNDARY_LINE_START:
- if (pango_layout_iter_next_line (iter))
- end_index = pango_layout_iter_get_line (iter)->start_index;
- break;
- case ATK_TEXT_BOUNDARY_LINE_END:
- if (prev_line)
- start_index = prev_line->start_index +
- prev_line->length;
- break;
- default:
- g_assert_not_reached();
- }
- break;
- case GAIL_AFTER_OFFSET:
- /*
- * We want the next line
- */
- if (pango_layout_iter_next_line (iter))
- {
- line = pango_layout_iter_get_line (iter);
- switch (boundary_type)
- {
- case ATK_TEXT_BOUNDARY_LINE_START:
- start_index = line->start_index;
- if (pango_layout_iter_next_line (iter))
- end_index = pango_layout_iter_get_line (iter)->start_index;
- else
- end_index = start_index + line->length;
- break;
- case ATK_TEXT_BOUNDARY_LINE_END:
- start_index = end_index;
- end_index = line->start_index + line->length;
- break;
- default:
- g_assert_not_reached();
- }
- }
- else
- start_index = end_index;
- break;
- }
- found = TRUE;
- break;
- }
- prev_prev_line = prev_line;
- prev_line = line;
- }
- while (pango_layout_iter_next_line (iter));
-
- if (!found)
- {
- start_index = prev_line->start_index + prev_line->length;
- end_index = start_index;
- }
- pango_layout_iter_free (iter);
- *start_offset = g_utf8_pointer_to_offset (text, text + start_index);
- *end_offset = g_utf8_pointer_to_offset (text, text + end_index);
-
- gtk_text_buffer_get_iter_at_offset (buffer, start_iter, *start_offset);
- gtk_text_buffer_get_iter_at_offset (buffer, end_iter, *end_offset);
-}
https://www.fi.muni.cz/~kas/git / evince.git / blobdiff