/* GTK - The GIMP Toolkit * gtktextbuffer.c Copyright (C) 2000 Red Hat, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser 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. */ /* * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS * file for a list of people on the GTK+ Team. See the ChangeLog * files for a list of changes. These files are distributed with * GTK+ at ftp://ftp.gtk.org/pub/gtk/. */ #include #include "gtkclipboard.h" #include "gtkinvisible.h" #include "gtksignal.h" #include "gtktextbuffer.h" #include "gtktextbtree.h" #include "gtktextiterprivate.h" #include typedef struct _ClipboardRequest ClipboardRequest; struct _ClipboardRequest { GtkTextBuffer *buffer; gboolean interactive; gboolean default_editable; gboolean is_clipboard; gboolean replace_selection; }; enum { INSERT_TEXT, DELETE_TEXT, CHANGED, MODIFIED_CHANGED, MARK_SET, MARK_DELETED, APPLY_TAG, REMOVE_TAG, LAST_SIGNAL }; enum { ARG_0, LAST_ARG }; enum { TARGET_STRING, TARGET_TEXT, TARGET_COMPOUND_TEXT, TARGET_UTF8_STRING, TARGET_TEXT_BUFFER_CONTENTS }; static void gtk_text_buffer_init (GtkTextBuffer *tkxt_buffer); static void gtk_text_buffer_class_init (GtkTextBufferClass *klass); static void gtk_text_buffer_finalize (GObject *object); static void gtk_text_buffer_update_primary_selection (GtkTextBuffer *buffer); static void gtk_text_buffer_real_insert_text (GtkTextBuffer *buffer, GtkTextIter *iter, const gchar *text, gint len, gboolean interactive); static void gtk_text_buffer_real_delete_text (GtkTextBuffer *buffer, GtkTextIter *start, GtkTextIter *end, gboolean interactive); static void gtk_text_buffer_real_apply_tag (GtkTextBuffer *buffer, GtkTextTag *tag, const GtkTextIter *start_char, const GtkTextIter *end_char); static void gtk_text_buffer_real_remove_tag (GtkTextBuffer *buffer, GtkTextTag *tag, const GtkTextIter *start_char, const GtkTextIter *end_char); static void gtk_text_buffer_real_changed (GtkTextBuffer *buffer); static GtkTextBTree* get_btree (GtkTextBuffer *buffer); static void free_log_attr_cache (GtkTextLogAttrCache *cache); static GtkObjectClass *parent_class = NULL; static guint signals[LAST_SIGNAL] = { 0 }; GtkType gtk_text_buffer_get_type (void) { static GtkType our_type = 0; if (our_type == 0) { static const GtkTypeInfo our_info = { "GtkTextBuffer", sizeof (GtkTextBuffer), sizeof (GtkTextBufferClass), (GtkClassInitFunc) gtk_text_buffer_class_init, (GtkObjectInitFunc) gtk_text_buffer_init, /* reserved_1 */ NULL, /* reserved_2 */ NULL, (GtkClassInitFunc) NULL }; our_type = gtk_type_unique (GTK_TYPE_OBJECT, &our_info); } return our_type; } static void gtk_text_buffer_class_init (GtkTextBufferClass *klass) { GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass); GObjectClass *gobject_class = G_OBJECT_CLASS (klass); parent_class = gtk_type_class (GTK_TYPE_OBJECT); signals[INSERT_TEXT] = gtk_signal_new ("insert_text", GTK_RUN_LAST, GTK_CLASS_TYPE (object_class), GTK_SIGNAL_OFFSET (GtkTextBufferClass, insert_text), gtk_marshal_VOID__BOXED_BOXED_INT_BOOLEAN, GTK_TYPE_NONE, 4, GTK_TYPE_TEXT_ITER, GTK_TYPE_TEXT_ITER, GTK_TYPE_INT, GTK_TYPE_BOOL); signals[DELETE_TEXT] = gtk_signal_new ("delete_text", GTK_RUN_LAST, GTK_CLASS_TYPE (object_class), GTK_SIGNAL_OFFSET (GtkTextBufferClass, delete_text), gtk_marshal_VOID__BOXED_BOXED_BOOLEAN, GTK_TYPE_NONE, 3, GTK_TYPE_TEXT_ITER, GTK_TYPE_TEXT_ITER, GTK_TYPE_BOOL); signals[CHANGED] = gtk_signal_new ("changed", GTK_RUN_LAST, GTK_CLASS_TYPE (object_class), GTK_SIGNAL_OFFSET (GtkTextBufferClass, changed), gtk_marshal_VOID__VOID, GTK_TYPE_NONE, 0); signals[MODIFIED_CHANGED] = gtk_signal_new ("modified_changed", GTK_RUN_LAST, GTK_CLASS_TYPE (object_class), GTK_SIGNAL_OFFSET (GtkTextBufferClass, modified_changed), gtk_marshal_VOID__VOID, GTK_TYPE_NONE, 0); signals[MARK_SET] = gtk_signal_new ("mark_set", GTK_RUN_LAST, GTK_CLASS_TYPE (object_class), GTK_SIGNAL_OFFSET (GtkTextBufferClass, mark_set), gtk_marshal_VOID__BOXED_OBJECT, GTK_TYPE_NONE, 2, GTK_TYPE_TEXT_ITER, G_TYPE_OBJECT); signals[MARK_DELETED] = gtk_signal_new ("mark_deleted", GTK_RUN_LAST, GTK_CLASS_TYPE (object_class), GTK_SIGNAL_OFFSET (GtkTextBufferClass, mark_deleted), gtk_marshal_VOID__OBJECT, GTK_TYPE_NONE, 1, G_TYPE_OBJECT); signals[APPLY_TAG] = gtk_signal_new ("apply_tag", GTK_RUN_LAST, GTK_CLASS_TYPE (object_class), GTK_SIGNAL_OFFSET (GtkTextBufferClass, apply_tag), gtk_marshal_VOID__OBJECT_BOXED_BOXED, GTK_TYPE_NONE, 3, G_TYPE_OBJECT, GTK_TYPE_TEXT_ITER, GTK_TYPE_TEXT_ITER); signals[REMOVE_TAG] = gtk_signal_new ("remove_tag", GTK_RUN_LAST, GTK_CLASS_TYPE (object_class), GTK_SIGNAL_OFFSET (GtkTextBufferClass, remove_tag), gtk_marshal_VOID__OBJECT_BOXED_BOXED, GTK_TYPE_NONE, 3, G_TYPE_OBJECT, GTK_TYPE_TEXT_ITER, GTK_TYPE_TEXT_ITER); gtk_object_class_add_signals (object_class, signals, LAST_SIGNAL); gobject_class->finalize = gtk_text_buffer_finalize; klass->insert_text = gtk_text_buffer_real_insert_text; klass->delete_text = gtk_text_buffer_real_delete_text; klass->apply_tag = gtk_text_buffer_real_apply_tag; klass->remove_tag = gtk_text_buffer_real_remove_tag; klass->changed = gtk_text_buffer_real_changed; } void gtk_text_buffer_init (GtkTextBuffer *buffer) { buffer->clipboard_contents = NULL; } /** * gtk_text_buffer_new: * @table: a tag table, or NULL to create a new one * * Creates a new text buffer. * * Return value: a new text buffer **/ GtkTextBuffer* gtk_text_buffer_new (GtkTextTagTable *table) { GtkTextBuffer *text_buffer; text_buffer = GTK_TEXT_BUFFER (gtk_type_new (gtk_text_buffer_get_type ())); if (table) { text_buffer->tag_table = table; gtk_object_ref (GTK_OBJECT (text_buffer->tag_table)); gtk_object_sink (GTK_OBJECT (text_buffer->tag_table)); } gtk_object_ref (GTK_OBJECT (text_buffer)); gtk_object_sink (GTK_OBJECT (text_buffer)); return text_buffer; } static void gtk_text_buffer_finalize (GObject *object) { GtkTextBuffer *buffer; buffer = GTK_TEXT_BUFFER (object); if (buffer->clipboard_contents) { g_object_unref (G_OBJECT (buffer->clipboard_contents)); buffer->clipboard_contents = NULL; } if (buffer->tag_table) { gtk_object_unref (GTK_OBJECT (buffer->tag_table)); buffer->tag_table = NULL; } if (buffer->btree) { gtk_text_btree_unref (buffer->btree); buffer->btree = NULL; } if (buffer->log_attr_cache) free_log_attr_cache (buffer->log_attr_cache); buffer->log_attr_cache = NULL; G_OBJECT_CLASS (parent_class)->finalize (object); } static GtkTextTagTable* get_table (GtkTextBuffer *buffer) { if (buffer->tag_table == NULL) { buffer->tag_table = gtk_text_tag_table_new (); gtk_object_ref (GTK_OBJECT (buffer->tag_table)); gtk_object_sink (GTK_OBJECT (buffer->tag_table)); } return buffer->tag_table; } static GtkTextBTree* get_btree (GtkTextBuffer *buffer) { if (buffer->btree == NULL) buffer->btree = gtk_text_btree_new (gtk_text_buffer_get_tag_table (buffer), buffer); return buffer->btree; } GtkTextBTree* _gtk_text_buffer_get_btree (GtkTextBuffer *buffer) { return get_btree (buffer); } /** * gtk_text_buffer_get_tag_table: * @buffer: a #GtkTextBuffer * * Get the #GtkTextTagTable associated with this buffer. * * Return value: the buffer's tag table **/ GtkTextTagTable* gtk_text_buffer_get_tag_table (GtkTextBuffer *buffer) { g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL); return get_table (buffer); } /** * gtk_text_buffer_set_text: * @buffer: a #GtkTextBuffer * @text: UTF-8 text to insert * @len: length of @text in bytes * * Deletes current contents of @buffer, and inserts @text instead. If * @text doesn't end with a newline, a newline is added; * #GtkTextBuffer contents must always end with a newline. If @text * ends with a newline, the new buffer contents will be exactly * @text. If @len is -1, @text must be nul-terminated. **/ void gtk_text_buffer_set_text (GtkTextBuffer *buffer, const gchar *text, gint len) { GtkTextIter start, end; g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (text != NULL); if (len < 0) len = strlen (text); /* Chop newline, since the buffer will already have one * in it. */ if (len > 0 && text[len-1] == '\n') len -= 1; gtk_text_buffer_get_bounds (buffer, &start, &end); gtk_text_buffer_delete (buffer, &start, &end); if (len > 0) { gtk_text_buffer_get_iter_at_offset (buffer, &start, 0); gtk_text_buffer_insert (buffer, &start, text, len); } } /* * Insertion */ static void gtk_text_buffer_real_insert_text (GtkTextBuffer *buffer, GtkTextIter *iter, const gchar *text, gint len, gboolean interactive) { g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (iter != NULL); gtk_text_btree_insert (iter, text, len); gtk_signal_emit (GTK_OBJECT (buffer), signals[CHANGED]); } static void gtk_text_buffer_emit_insert (GtkTextBuffer *buffer, GtkTextIter *iter, const gchar *text, gint len, gboolean interactive) { g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (iter != NULL); g_return_if_fail (text != NULL); if (len < 0) len = strlen (text); if (len > 0) { gtk_signal_emit (GTK_OBJECT (buffer), signals[INSERT_TEXT], iter, text, len, interactive); } } /** * gtk_text_buffer_insert: * @buffer: a #GtkTextBuffer * @iter: a position in the buffer * @text: UTF-8 format text to insert * @len: length of text in bytes, or -1 * * Inserts @len bytes of @text at position @iter. If @len is -1, * @text must be nul-terminated and will be inserted in its * entirety. Emits the "insert_text" signal; insertion actually occurs * in the default handler for the signal. @iter is invalidated when * insertion occurs (because the buffer contents change), but the * default signal handler revalidates it to point to the end of the * inserted text. * **/ void gtk_text_buffer_insert (GtkTextBuffer *buffer, GtkTextIter *iter, const gchar *text, gint len) { g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (iter != NULL); g_return_if_fail (text != NULL); gtk_text_buffer_emit_insert (buffer, iter, text, len, FALSE); } /** * gtk_text_buffer_insert_at_cursor: * @buffer: a #GtkTextBuffer * @text: some text in UTF-8 format * @len: length of text, in bytes * * Simply calls gtk_text_buffer_insert (), using the current * cursor position as the insertion point. **/ void gtk_text_buffer_insert_at_cursor (GtkTextBuffer *buffer, const gchar *text, gint len) { GtkTextIter iter; g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (text != NULL); gtk_text_buffer_get_iter_at_mark (buffer, &iter, gtk_text_buffer_get_mark (buffer, "insert")); gtk_text_buffer_insert (buffer, &iter, text, len); } /** * gtk_text_buffer_insert_interactive: * @buffer: a #GtkTextBuffer * @iter: a position in @buffer * @text: some UTF-8 text * @len: length of text in bytes, or -1 * @default_editable: default editability of buffer * * Like gtk_text_buffer_insert (), but the insertion will not occur if * @iter is at a non-editable location in the buffer. Usually you * want to prevent insertions at ineditable locations if the insertion * results from a user action (is interactive). * * @default_editable indicates the editability of text that doesn't * have a tag affecting editability applied to it. Typically the * result of gtk_text_view_get_editable() is appropriate here. * * Return value: whether text was actually inserted **/ gboolean gtk_text_buffer_insert_interactive (GtkTextBuffer *buffer, GtkTextIter *iter, const gchar *text, gint len, gboolean default_editable) { g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE); g_return_val_if_fail (text != NULL, FALSE); if (gtk_text_iter_editable (iter, default_editable)) { gtk_text_buffer_emit_insert (buffer, iter, text, len, TRUE); return TRUE; } else return FALSE; } /** * gtk_text_buffer_insert_interactive_at_cursor: * @buffer: a #GtkTextBuffer * @text: text in UTF-8 format * @len: length of text in bytes, or -1 * @default_editable: default editability of buffer * * Calls gtk_text_buffer_insert_interactive () at the cursor * position. * * @default_editable indicates the editability of text that doesn't * have a tag affecting editability applied to it. Typically the * result of gtk_text_view_get_editable() is appropriate here. * * Return value: whether text was actually inserted **/ gboolean gtk_text_buffer_insert_interactive_at_cursor (GtkTextBuffer *buffer, const gchar *text, gint len, gboolean default_editable) { GtkTextIter iter; g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE); g_return_val_if_fail (text != NULL, FALSE); gtk_text_buffer_get_iter_at_mark (buffer, &iter, gtk_text_buffer_get_mark (buffer, "insert")); return gtk_text_buffer_insert_interactive (buffer, &iter, text, len, default_editable); } static gboolean possibly_not_text (gunichar ch, gpointer user_data) { return ch == GTK_TEXT_UNKNOWN_CHAR; } static void insert_text_range (GtkTextBuffer *buffer, GtkTextIter *iter, const GtkTextIter *orig_start, const GtkTextIter *orig_end, gboolean interactive) { gchar *text; text = gtk_text_iter_get_text (orig_start, orig_end); gtk_text_buffer_emit_insert (buffer, iter, text, -1, interactive); g_free (text); } typedef struct _Range Range; struct _Range { GtkTextBuffer *buffer; GtkTextMark *start_mark; GtkTextMark *end_mark; GtkTextMark *whole_end_mark; GtkTextIter *range_start; GtkTextIter *range_end; GtkTextIter *whole_end; }; static Range* save_range (GtkTextIter *range_start, GtkTextIter *range_end, GtkTextIter *whole_end) { Range *r; r = g_new (Range, 1); r->buffer = gtk_text_iter_get_buffer (range_start); g_object_ref (G_OBJECT (r->buffer)); r->start_mark = gtk_text_buffer_create_mark (gtk_text_iter_get_buffer (range_start), NULL, range_start, TRUE); r->end_mark = gtk_text_buffer_create_mark (gtk_text_iter_get_buffer (range_start), NULL, range_end, FALSE); r->whole_end_mark = gtk_text_buffer_create_mark (gtk_text_iter_get_buffer (range_start), NULL, whole_end, FALSE); r->range_start = range_start; r->range_end = range_end; r->whole_end = whole_end; return r; } static void restore_range (Range *r) { gtk_text_buffer_get_iter_at_mark (r->buffer, r->range_start, r->start_mark); gtk_text_buffer_get_iter_at_mark (r->buffer, r->range_end, r->end_mark); gtk_text_buffer_get_iter_at_mark (r->buffer, r->whole_end, r->whole_end_mark); gtk_text_buffer_delete_mark (r->buffer, r->start_mark); gtk_text_buffer_delete_mark (r->buffer, r->end_mark); gtk_text_buffer_delete_mark (r->buffer, r->whole_end_mark); g_object_unref (G_OBJECT (r->buffer)); g_free (r); } static void insert_range_untagged (GtkTextBuffer *buffer, GtkTextIter *iter, const GtkTextIter *orig_start, const GtkTextIter *orig_end, gboolean interactive) { GtkTextIter range_start; GtkTextIter range_end; GtkTextIter start, end; GtkTextBuffer *src_buffer; Range *r; if (gtk_text_iter_equal (orig_start, orig_end)) return; start = *orig_start; end = *orig_end; src_buffer = gtk_text_iter_get_buffer (&start); range_start = start; range_end = start; while (TRUE) { if (gtk_text_iter_equal (&range_start, &range_end)) { /* Figure out how to move forward */ g_assert (gtk_text_iter_compare (&range_end, &end) <= 0); if (gtk_text_iter_equal (&range_end, &end)) { /* nothing left to do */ break; } else if (gtk_text_iter_get_char (&range_end) == GTK_TEXT_UNKNOWN_CHAR) { GdkPixbuf *pixbuf = NULL; GtkTextChildAnchor *anchor = NULL; pixbuf = gtk_text_iter_get_pixbuf (&range_end); anchor = gtk_text_iter_get_child_anchor (&range_end); if (pixbuf) { r = save_range (&range_start, &range_end, &end); gtk_text_buffer_insert_pixbuf (buffer, iter, pixbuf); restore_range (r); r = NULL; gtk_text_iter_forward_char (&range_end); range_start = range_end; } else if (anchor) { /* Just skip anchors */ gtk_text_iter_forward_char (&range_end); range_start = range_end; } else { /* The GTK_TEXT_UNKNOWN_CHAR was in a text segment, so * keep going. */ gtk_text_iter_forward_find_char (&range_end, possibly_not_text, NULL, &end); g_assert (gtk_text_iter_compare (&range_end, &end) <= 0); } } else { /* Text segment starts here, so forward search to * find its possible endpoint */ gtk_text_iter_forward_find_char (&range_end, possibly_not_text, NULL, &end); g_assert (gtk_text_iter_compare (&range_end, &end) <= 0); } } else { r = save_range (&range_start, &range_end, &end); insert_text_range (buffer, iter, &range_start, &range_end, interactive); restore_range (r); r = NULL; range_start = range_end; } } } static void gtk_text_buffer_real_insert_range (GtkTextBuffer *buffer, GtkTextIter *iter, const GtkTextIter *orig_start, const GtkTextIter *orig_end, gboolean interactive) { /* Find each range of uniformly-tagged text, insert it, * then apply the tags. */ GtkTextIter start = *orig_start; GtkTextIter end = *orig_end; GtkTextIter range_start; GtkTextIter range_end; GtkTextBuffer *src_buffer; Range *r; if (gtk_text_iter_equal (orig_start, orig_end)) return; src_buffer = gtk_text_iter_get_buffer (orig_start); gtk_text_iter_reorder (&start, &end); range_start = start; range_end = start; while (TRUE) { gint start_offset; GtkTextIter start_iter; GSList *tags; GSList *tmp_list; if (gtk_text_iter_equal (&range_start, &end)) break; /* All done */ g_assert (gtk_text_iter_compare (&range_start, &end) < 0); gtk_text_iter_forward_to_tag_toggle (&range_end, NULL); g_assert (!gtk_text_iter_equal (&range_start, &range_end)); /* Clamp to the end iterator */ if (gtk_text_iter_compare (&range_end, &end) > 0) range_end = end; /* We have a range with unique tags; insert it, and * apply all tags. */ start_offset = gtk_text_iter_get_offset (iter); r = save_range (&range_start, &range_end, &end); insert_range_untagged (buffer, iter, &range_start, &range_end, interactive); restore_range (r); r = NULL; gtk_text_buffer_get_iter_at_offset (buffer, &start_iter, start_offset); tags = gtk_text_iter_get_tags (&range_start); tmp_list = tags; while (tmp_list != NULL) { gtk_text_buffer_apply_tag (buffer, tmp_list->data, &start_iter, iter); tmp_list = g_slist_next (tmp_list); } g_slist_free (tags); range_start = range_end; } } /** * gtk_text_buffer_insert_range: * @buffer: a #GtkTextBuffer * @iter: a position in @buffer * @start: a position in a #GtkTextBuffer * @end: another position in the same buffer as @start * * Copies text, tags, and pixbufs between @start and @end (the order * of @start and @end doesn't matter) and inserts the copy at @iter. * Used instead of simply getting/inserting text because it preserves * images and tags. If @start and @end are in a different buffer from * @buffer, the two buffers must share the same tag table. * * Implemented via emissions of the insert_text and apply_tag signals, * so expect those. **/ void gtk_text_buffer_insert_range (GtkTextBuffer *buffer, GtkTextIter *iter, const GtkTextIter *start, const GtkTextIter *end) { g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (iter != NULL); g_return_if_fail (start != NULL); g_return_if_fail (end != NULL); g_return_if_fail (gtk_text_iter_get_buffer (start) == gtk_text_iter_get_buffer (end)); g_return_if_fail (gtk_text_iter_get_buffer (start)->tag_table == buffer->tag_table); gtk_text_buffer_real_insert_range (buffer, iter, start, end, FALSE); } /** * gtk_text_buffer_insert_range_interactive: * @buffer: a #GtkTextBuffer * @iter: a position in @buffer * @start: a position in a #GtkTextBuffer * @end: another position in the same buffer as @start * @default_editable: default editability of the buffer * * Same as gtk_text_buffer_insert_range(), but does nothing if the * insertion point isn't editable. The @default_editable parameter * indicates whether the text is editable at @iter if no tags * enclosing @iter affect editability. Typically the result of * gtk_text_view_get_editable() is appropriate here. * * Returns: whether an insertion was possible at @iter **/ gboolean gtk_text_buffer_insert_range_interactive (GtkTextBuffer *buffer, GtkTextIter *iter, const GtkTextIter *start, const GtkTextIter *end, gboolean default_editable) { g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE); g_return_val_if_fail (iter != NULL, FALSE); g_return_val_if_fail (start != NULL, FALSE); g_return_val_if_fail (end != NULL, FALSE); g_return_val_if_fail (gtk_text_iter_get_buffer (start) == gtk_text_iter_get_buffer (end), FALSE); g_return_val_if_fail (gtk_text_iter_get_buffer (start)->tag_table == buffer->tag_table, FALSE); if (gtk_text_iter_editable (iter, default_editable)) { gtk_text_buffer_real_insert_range (buffer, iter, start, end, TRUE); return TRUE; } else return FALSE; } /** * gtk_text_buffer_insert_with_tags: * @buffer: a #GtkTextBuffer * @iter: an iterator in @buffer * @text: UTF-8 text * @len: length of @text, or -1 * @first_tag: first tag to apply to @text * @Varargs: NULL-terminated list of tags to apply * * Inserts @text into @buffer at @iter, applying the list of tags to * the newly-inserted text. The last tag specified must be NULL to * terminate the list. Equivalent to calling gtk_text_buffer_insert (), * then gtk_text_buffer_apply_tag () on the inserted text; * gtk_text_buffer_insert_with_tags () is just a convenience function. **/ void gtk_text_buffer_insert_with_tags (GtkTextBuffer *buffer, GtkTextIter *iter, const gchar *text, gint len, GtkTextTag *first_tag, ...) { gint start_offset; GtkTextIter start; va_list args; GtkTextTag *tag; g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (iter != NULL); g_return_if_fail (text != NULL); start_offset = gtk_text_iter_get_offset (iter); gtk_text_buffer_insert (buffer, iter, text, len); if (first_tag == NULL) return; gtk_text_buffer_get_iter_at_offset (buffer, &start, start_offset); va_start (args, first_tag); tag = first_tag; while (tag) { gtk_text_buffer_apply_tag (buffer, tag, &start, iter); tag = va_arg (args, GtkTextTag*); } va_end (args); } /** * gtk_text_buffer_insert_with_tags_by_name: * @buffer: a #GtkTextBuffer * @iter: position in @buffer * @text: UTF-8 text * @len: length of @text, or -1 * @first_tag_name: name of a tag to apply to @text * @Varargs: more tag names * * Same as gtk_text_buffer_insert_with_tags (), but allows you * to pass in tag names instead of tag objects. **/ void gtk_text_buffer_insert_with_tags_by_name (GtkTextBuffer *buffer, GtkTextIter *iter, const gchar *text, gint len, const gchar *first_tag_name, ...) { gint start_offset; GtkTextIter start; va_list args; const gchar *tag_name; g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (iter != NULL); g_return_if_fail (text != NULL); start_offset = gtk_text_iter_get_offset (iter); gtk_text_buffer_insert (buffer, iter, text, len); if (first_tag_name == NULL) return; gtk_text_buffer_get_iter_at_offset (buffer, &start, start_offset); va_start (args, first_tag_name); tag_name = first_tag_name; while (tag_name) { GtkTextTag *tag; tag = gtk_text_tag_table_lookup (buffer->tag_table, tag_name); if (tag == NULL) { g_warning ("%s: no tag with name '%s'!", G_STRLOC, tag_name); return; } gtk_text_buffer_apply_tag (buffer, tag, &start, iter); tag_name = va_arg (args, const gchar*); } va_end (args); } /* * Deletion */ static void gtk_text_buffer_real_delete_text (GtkTextBuffer *buffer, GtkTextIter *start, GtkTextIter *end, gboolean interactive) { g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (start != NULL); g_return_if_fail (end != NULL); gtk_text_btree_delete (start, end); /* may have deleted the selection... */ gtk_text_buffer_update_primary_selection (buffer); gtk_signal_emit (GTK_OBJECT (buffer), signals[CHANGED]); } static void gtk_text_buffer_emit_delete (GtkTextBuffer *buffer, GtkTextIter *start, GtkTextIter *end, gboolean interactive) { g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (start != NULL); g_return_if_fail (end != NULL); if (gtk_text_iter_equal (start, end)) return; gtk_text_iter_reorder (start, end); /* Somewhat annoyingly, if you try to delete the final newline * the BTree will put it back; which means you can't deduce the * final contents of the buffer purely by monitoring insert/delete * signals on the buffer. But if you delete the final newline, any * tags on the newline will go away, oddly. See comment in * gtktextbtree.c. This is all sort of annoying, but really hard * to fix. */ gtk_signal_emit (GTK_OBJECT (buffer), signals[DELETE_TEXT], start, end, interactive); } /** * gtk_text_buffer_delete: * @buffer: a #GtkTextBuffer * @start: a position in @buffer * @end: another position in @buffer * * Deletes text between @start and @end. The order of @start and @end * is not actually relevant; gtk_text_buffer_delete () will reorder * them. This function actually emits the "delete_text" signal, and * the default handler of that signal deletes the text. Because the * buffer is modified, all outstanding iterators become invalid after * calling this function; however, the @start and @end will be * re-initialized to point to the location where text was deleted. * * Note that the final newline in the buffer may not be deleted; a * #GtkTextBuffer always contains at least one newline. You can * safely include the final newline in the range [@start,@end) but it * won't be affected by the deletion. * **/ void gtk_text_buffer_delete (GtkTextBuffer *buffer, GtkTextIter *start, GtkTextIter *end) { g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (start != NULL); g_return_if_fail (end != NULL); gtk_text_buffer_emit_delete (buffer, start, end, FALSE); } /** * gtk_text_buffer_delete_interactive: * @buffer: a #GtkTextBuffer * @start_iter: start of range to delete * @end_iter: end of range * @default_editable: whether the buffer is editable by default * * Deletes all editable text in the given range. * Calls gtk_text_buffer_delete () for each editable sub-range of * [@start,@end). @start and @end are revalidated to point to * the location of the last deleted range, or left untouched if * no text was deleted. * * Return value: whether some text was actually deleted **/ gboolean gtk_text_buffer_delete_interactive (GtkTextBuffer *buffer, GtkTextIter *start_iter, GtkTextIter *end_iter, gboolean default_editable) { GtkTextMark *end_mark; GtkTextMark *start_mark; GtkTextIter iter; gboolean current_state; gboolean deleted_stuff = FALSE; /* Delete all editable text in the range start_iter, end_iter */ g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE); g_return_val_if_fail (start_iter != NULL, FALSE); g_return_val_if_fail (end_iter != NULL, FALSE); gtk_text_iter_reorder (start_iter, end_iter); start_mark = gtk_text_buffer_create_mark (buffer, NULL, start_iter, TRUE); end_mark = gtk_text_buffer_create_mark (buffer, NULL, end_iter, FALSE); iter = *start_iter; current_state = gtk_text_iter_editable (&iter, default_editable); while (TRUE) { gboolean new_state; gboolean done = FALSE; GtkTextIter end; gtk_text_iter_forward_to_tag_toggle (&iter, NULL); gtk_text_buffer_get_iter_at_mark (buffer, &end, end_mark); if (gtk_text_iter_compare (&iter, &end) >= 0) { done = TRUE; iter = end; /* clamp to the last boundary */ } new_state = gtk_text_iter_editable (&iter, default_editable); if (current_state == new_state) { if (done) { if (current_state) { /* We're ending an editable region. Delete said region. */ GtkTextIter start; gtk_text_buffer_get_iter_at_mark (buffer, &start, start_mark); gtk_text_buffer_emit_delete (buffer, &start, &iter, TRUE); deleted_stuff = TRUE; /* revalidate user's iterators. */ *start_iter = start; *end_iter = iter; } break; } else continue; } if (current_state && !new_state) { /* End of an editable region. Delete it. */ GtkTextIter start; gtk_text_buffer_get_iter_at_mark (buffer, &start, start_mark); gtk_text_buffer_emit_delete (buffer, &start, &iter, TRUE); current_state = FALSE; deleted_stuff = TRUE; /* revalidate user's iterators. */ *start_iter = start; *end_iter = iter; } else { /* We are at the start of an editable region. We won't be deleting * the previous region. Move start mark to start of this region. */ g_assert (!current_state && new_state); gtk_text_buffer_move_mark (buffer, start_mark, &iter); current_state = TRUE; } if (done) break; } gtk_text_buffer_delete_mark (buffer, start_mark); gtk_text_buffer_delete_mark (buffer, end_mark); return deleted_stuff; } /* * Extracting textual buffer contents */ /** * gtk_text_buffer_get_text: * @buffer: a #GtkTextBuffer * @start: start of a range * @end: end of a range * @include_hidden_chars: whether to include invisible text * * Returns the text in the range [@start,@end). Excludes undisplayed * text (text marked with tags that set the invisibility attribute) if * @include_hidden_chars is FALSE. Does not include characters * representing embedded images, so byte and character indexes into * the returned string do not correspond to byte * and character indexes into the buffer. Contrast with * gtk_text_buffer_get_slice (). * * Return value: an allocated UTF-8 string **/ gchar* gtk_text_buffer_get_text (GtkTextBuffer *buffer, const GtkTextIter *start, const GtkTextIter *end, gboolean include_hidden_chars) { g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL); g_return_val_if_fail (start != NULL, NULL); g_return_val_if_fail (end != NULL, NULL); if (include_hidden_chars) return gtk_text_iter_get_text (start, end); else return gtk_text_iter_get_visible_text (start, end); } /** * gtk_text_buffer_get_slice: * @buffer: a #GtkTextBuffer * @start: start of a range * @end: end of a range * @include_hidden_chars: whether to include invisible text * * Returns the text in the range [@start,@end). Excludes undisplayed * text (text marked with tags that set the invisibility attribute) if * @include_hidden_chars is FALSE. The returned string includes a * 0xFFFC character whenever the buffer contains * embedded images, so byte and character indexes into * the returned string do correspond to byte * and character indexes into the buffer. Contrast with * gtk_text_buffer_get_text (). Note that 0xFFFC can occur in normal * text as well, so it is not a reliable indicator that a pixbuf or * widget is in the buffer. * * Return value: an allocated UTF-8 string **/ gchar* gtk_text_buffer_get_slice (GtkTextBuffer *buffer, const GtkTextIter *start, const GtkTextIter *end, gboolean include_hidden_chars) { g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL); g_return_val_if_fail (start != NULL, NULL); g_return_val_if_fail (end != NULL, NULL); if (include_hidden_chars) return gtk_text_iter_get_slice (start, end); else return gtk_text_iter_get_visible_slice (start, end); } /* * Pixmaps */ void gtk_text_buffer_insert_pixbuf (GtkTextBuffer *buffer, GtkTextIter *iter, GdkPixbuf *pixbuf) { g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (iter != NULL); g_return_if_fail (GDK_IS_PIXBUF (pixbuf)); gtk_text_btree_insert_pixbuf (iter, pixbuf); /* FIXME pixbuf-specific signal like insert_text */ gtk_signal_emit (GTK_OBJECT (buffer), signals[CHANGED]); } /* * Child anchor */ GtkTextChildAnchor* gtk_text_buffer_create_child_anchor (GtkTextBuffer *buffer, GtkTextIter *iter) { GtkTextChildAnchor *anchor; g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL); g_return_val_if_fail (iter != NULL, NULL); anchor = gtk_text_btree_create_child_anchor (iter); /* FIXME child-anchor-specific signal */ gtk_signal_emit (GTK_OBJECT (buffer), signals[CHANGED]); return anchor; } /* * Mark manipulation */ static void gtk_text_buffer_mark_set (GtkTextBuffer *buffer, const GtkTextIter *location, GtkTextMark *mark) { /* IMO this should NOT work like insert_text and delete_text, where the real action happens in the default handler. The reason is that the default handler would be _required_, i.e. the whole widget would start breaking and segfaulting if the default handler didn't get run. So you can't really override the default handler or stop the emission; that is, this signal is purely for notification, and not to allow users to modify the default behavior. */ g_object_ref (G_OBJECT (mark)); gtk_signal_emit (GTK_OBJECT (buffer), signals[MARK_SET], location, mark); g_object_unref (G_OBJECT (mark)); } /** * gtk_text_buffer_set_mark: * @buffer: a #GtkTextBuffer * @mark_name: name of the mark * @iter: location for the mark. * @left_gravity: if the mark is created by this function, gravity for the new * mark. * @should_exist: if %TRUE, warn if the mark does not exist, and return * immediately. * * Move the mark to the given position, if not @should_exist, create the mark. * * Return value: mark **/ static GtkTextMark* gtk_text_buffer_set_mark (GtkTextBuffer *buffer, GtkTextMark *existing_mark, const gchar *mark_name, const GtkTextIter *iter, gboolean left_gravity, gboolean should_exist) { GtkTextIter location; GtkTextMark *mark; mark = gtk_text_btree_set_mark (get_btree (buffer), existing_mark, mark_name, left_gravity, iter, should_exist); if (gtk_text_btree_mark_is_insert (get_btree (buffer), mark) || gtk_text_btree_mark_is_selection_bound (get_btree (buffer), mark)) { gtk_text_buffer_update_primary_selection (buffer); } gtk_text_btree_get_iter_at_mark (get_btree (buffer), &location, mark); gtk_text_buffer_mark_set (buffer, &location, mark); return mark; } /** * gtk_text_buffer_create_mark: * @buffer: a #GtkTextBuffer * @mark_name: name for mark, or %NULL * @where: location to place mark * @left_gravity: whether the mark has left gravity * * Creates a mark at position @where. If @mark_name is %NULL, the mark * is anonymous; otherwise, the mark can be retrieved by name using * gtk_text_buffer_get_mark (). If a mark has left gravity, and text is * inserted at the mark's current location, the mark will be moved to * the left of the newly-inserted text. If the mark has right gravity * (@left_gravity = %FALSE), the mark will end up on the right of * newly-inserted text. The standard left-to-right cursor is a mark * with right gravity (when you type, the cursor stays on the right * side of the text you're typing). * * The caller of this function does not own a reference * to the returned #GtkTextMark, so you can ignore the return value * if you like. Marks are owned by the buffer and go away when the * buffer does. * * Emits the "mark_set" signal as notification of the mark's initial * placement. * * Return value: the new #GtkTextMark object **/ GtkTextMark* gtk_text_buffer_create_mark (GtkTextBuffer *buffer, const gchar *mark_name, const GtkTextIter *where, gboolean left_gravity) { g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL); return gtk_text_buffer_set_mark (buffer, NULL, mark_name, where, left_gravity, FALSE); } /** * gtk_text_buffer_move_mark: * @buffer: a #GtkTextBuffer * @mark: a #GtkTextMark * @where: new location for @mark in @buffer * * Moves @mark to the new location @where. Emits the "mark_set" signal * as notification of the move. **/ void gtk_text_buffer_move_mark (GtkTextBuffer *buffer, GtkTextMark *mark, const GtkTextIter *where) { g_return_if_fail (GTK_IS_TEXT_MARK (mark)); g_return_if_fail (!gtk_text_mark_get_deleted (mark)); g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); gtk_text_buffer_set_mark (buffer, mark, NULL, where, FALSE, TRUE); } /** * gtk_text_buffer_get_iter_at_mark: * @buffer: a #GtkTextBuffer * @iter: iterator to initialize * @mark: a #GtkTextMark in @buffer * * Initializes @iter with the current position of @mark. **/ void gtk_text_buffer_get_iter_at_mark (GtkTextBuffer *buffer, GtkTextIter *iter, GtkTextMark *mark) { g_return_if_fail (GTK_IS_TEXT_MARK (mark)); g_return_if_fail (!gtk_text_mark_get_deleted (mark)); g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); gtk_text_btree_get_iter_at_mark (get_btree (buffer), iter, mark); } /** * gtk_text_buffer_delete_mark: * @buffer: a #GtkTextBuffer * @mark: a #GtkTextMark in @buffer * * Deletes @mark, so that it's no longer located anywhere in the * buffer. Removes the reference the buffer holds to the mark, so if * you haven't called g_object_ref () on the mark, it will be freed. Even * if the mark isn't freed, most operations on @mark become * invalid. There is no way to undelete a * mark. gtk_text_mark_get_deleted () will return TRUE after this * function has been called on a mark; gtk_text_mark_get_deleted () * indicates that a mark no longer belongs to a buffer. The "mark_deleted" * signal will be emitted as notification after the mark is deleted. **/ void gtk_text_buffer_delete_mark (GtkTextBuffer *buffer, GtkTextMark *mark) { g_return_if_fail (GTK_IS_TEXT_MARK (mark)); g_return_if_fail (!gtk_text_mark_get_deleted (mark)); g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_object_ref (G_OBJECT (mark)); gtk_text_btree_remove_mark (get_btree (buffer), mark); /* See rationale above for MARK_SET on why we emit this after * removing the mark, rather than removing the mark in a default * handler. */ gtk_signal_emit (GTK_OBJECT (buffer), signals[MARK_DELETED], mark); g_object_unref (G_OBJECT (mark)); } /** * gtk_text_buffer_get_mark: * @buffer: a #GtkTextBuffer * @name: a mark name * * Returns the mark named @name in buffer @buffer, or NULL if no such * mark exists in the buffer. * * Return value: a #GtkTextMark, or NULL **/ GtkTextMark* gtk_text_buffer_get_mark (GtkTextBuffer *buffer, const gchar *name) { GtkTextMark *mark; g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL); g_return_val_if_fail (name != NULL, NULL); mark = gtk_text_btree_get_mark_by_name (get_btree (buffer), name); return mark; } /** * gtk_text_buffer_move_mark_by_name: * @buffer: a #GtkTextBuffer * @name: name of a mark * @where: new location for mark * * Moves the mark named @name (which must exist) to location @where. * See gtk_text_buffer_move_mark () for details. **/ void gtk_text_buffer_move_mark_by_name (GtkTextBuffer *buffer, const gchar *name, const GtkTextIter *where) { GtkTextMark *mark; g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (name != NULL); mark = gtk_text_btree_get_mark_by_name (get_btree (buffer), name); if (mark == NULL) { g_warning ("%s: no mark named '%s'", G_STRLOC, name); return; } gtk_text_buffer_move_mark (buffer, mark, where); } /** * gtk_text_buffer_delete_mark_by_name: * @buffer: a #GtkTextBuffer * @name: name of a mark in @buffer * * Deletes the mark named @name; the mark must exist. See * gtk_text_buffer_delete_mark () for details. **/ void gtk_text_buffer_delete_mark_by_name (GtkTextBuffer *buffer, const gchar *name) { GtkTextMark *mark; g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (name != NULL); mark = gtk_text_btree_get_mark_by_name (get_btree (buffer), name); if (mark == NULL) { g_warning ("%s: no mark named '%s'", G_STRLOC, name); return; } gtk_text_buffer_delete_mark (buffer, mark); } /** * gtk_text_buffer_get_insert: * @buffer: a #GtkTextBuffer * * Returns the mark that represents the cursor (insertion point). * Equivalent to calling gtk_text_buffer_get_mark () to get the mark * name "insert," but very slightly more efficient, and involves less * typing. * * Return value: insertion point mark **/ GtkTextMark* gtk_text_buffer_get_insert (GtkTextBuffer *buffer) { g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL); /* FIXME use struct member in btree */ return gtk_text_buffer_get_mark (buffer, "insert"); } /** * gtk_text_buffer_get_selection_bound: * @buffer: a #GtkTextBuffer * * Returns the mark that represents the selection bound. Equivalent * to calling gtk_text_buffer_get_mark () to get the mark name * "selection_bound," but very slightly more efficient, and involves * less typing. * * The currently-selected text in @buffer is the region between the * "selection_bound" and "insert" marks. If "selection_bound" and * "insert" are in the same place, then there is no current selection. * gtk_text_buffer_get_selection_bounds () is another convenient function * for handling the selection, if you just want to know whether there's a * selection and what its bounds are. * * Return value: selection bound mark **/ GtkTextMark* gtk_text_buffer_get_selection_bound (GtkTextBuffer *buffer) { g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL); /* FIXME use struct member in btree */ return gtk_text_buffer_get_mark (buffer, "selection_bound"); } void gtk_text_buffer_get_iter_at_child_anchor (GtkTextBuffer *buffer, GtkTextIter *iter, GtkTextChildAnchor *anchor) { g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (iter != NULL); g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor)); g_return_if_fail (!gtk_text_child_anchor_get_deleted (anchor)); gtk_text_btree_get_iter_at_child_anchor (get_btree (buffer), iter, anchor); } /** * gtk_text_buffer_place_cursor: * @buffer: a #GtkTextBuffer * @where: where to put the cursor * * This function moves the "insert" and "selection_bound" marks * simultaneously. If you move them to the same place in two steps * with gtk_text_buffer_move_mark (), you will temporarily select a * region in between their old and new locations, which can be pretty * inefficient since the temporarily-selected region will force stuff * to be recalculated. This function moves them as a unit, which can * be optimized. **/ void gtk_text_buffer_place_cursor (GtkTextBuffer *buffer, const GtkTextIter *where) { GtkTextIter real; g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); real = *where; if (gtk_text_iter_is_last (&real)) gtk_text_iter_backward_char (&real); gtk_text_btree_place_cursor (get_btree (buffer), &real); gtk_text_buffer_mark_set (buffer, &real, gtk_text_buffer_get_mark (buffer, "insert")); gtk_text_buffer_mark_set (buffer, &real, gtk_text_buffer_get_mark (buffer, "selection_bound")); } /* * Tags */ /** * gtk_text_buffer_create_tag: * @buffer: a #GtkTextBuffer * @tag_name: name of the new tag, or %NULL * * Creates a tag and adds it to the tag table for @buffer. * Equivalent to calling gtk_text_tag_new () and then adding the * tag to the buffer's tag table. The returned tag has its refcount * incremented, as if you'd called gtk_text_tag_new (). * * If @tag_name is %NULL, the tag is anonymous. * * Return value: a new tag **/ GtkTextTag* gtk_text_buffer_create_tag (GtkTextBuffer *buffer, const gchar *tag_name) { GtkTextTag *tag; g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL); tag = gtk_text_tag_new (tag_name); gtk_text_tag_table_add (get_table (buffer), tag); return tag; } static void gtk_text_buffer_real_apply_tag (GtkTextBuffer *buffer, GtkTextTag *tag, const GtkTextIter *start, const GtkTextIter *end) { gtk_text_btree_tag (start, end, tag, TRUE); } static void gtk_text_buffer_real_remove_tag (GtkTextBuffer *buffer, GtkTextTag *tag, const GtkTextIter *start, const GtkTextIter *end) { gtk_text_btree_tag (start, end, tag, FALSE); } static void gtk_text_buffer_real_changed (GtkTextBuffer *buffer) { gtk_text_buffer_set_modified (buffer, TRUE); } static void gtk_text_buffer_emit_tag (GtkTextBuffer *buffer, GtkTextTag *tag, gboolean apply, const GtkTextIter *start, const GtkTextIter *end) { GtkTextIter start_tmp = *start; GtkTextIter end_tmp = *end; g_return_if_fail (tag != NULL); gtk_text_iter_reorder (&start_tmp, &end_tmp); if (apply) gtk_signal_emit (GTK_OBJECT (buffer), signals[APPLY_TAG], tag, &start_tmp, &end_tmp); else gtk_signal_emit (GTK_OBJECT (buffer), signals[REMOVE_TAG], tag, &start_tmp, &end_tmp); } void gtk_text_buffer_apply_tag (GtkTextBuffer *buffer, GtkTextTag *tag, const GtkTextIter *start, const GtkTextIter *end) { g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (GTK_IS_TEXT_TAG (tag)); g_return_if_fail (start != NULL); g_return_if_fail (end != NULL); gtk_text_buffer_emit_tag (buffer, tag, TRUE, start, end); } void gtk_text_buffer_remove_tag (GtkTextBuffer *buffer, GtkTextTag *tag, const GtkTextIter *start, const GtkTextIter *end) { g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (GTK_IS_TEXT_TAG (tag)); g_return_if_fail (start != NULL); g_return_if_fail (end != NULL); gtk_text_buffer_emit_tag (buffer, tag, FALSE, start, end); } void gtk_text_buffer_apply_tag_by_name (GtkTextBuffer *buffer, const gchar *name, const GtkTextIter *start, const GtkTextIter *end) { GtkTextTag *tag; g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (name != NULL); g_return_if_fail (start != NULL); g_return_if_fail (end != NULL); tag = gtk_text_tag_table_lookup (get_table (buffer), name); if (tag == NULL) { g_warning ("Unknown tag `%s'", name); return; } gtk_text_buffer_emit_tag (buffer, tag, TRUE, start, end); } void gtk_text_buffer_remove_tag_by_name (GtkTextBuffer *buffer, const gchar *name, const GtkTextIter *start, const GtkTextIter *end) { GtkTextTag *tag; g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); g_return_if_fail (name != NULL); g_return_if_fail (start != NULL); g_return_if_fail (end != NULL); tag = gtk_text_tag_table_lookup (get_table (buffer), name); if (tag == NULL) { g_warning ("Unknown tag `%s'", name); return; } gtk_text_buffer_emit_tag (buffer, tag, FALSE, start, end); } /* * Obtain various iterators */ void gtk_text_buffer_get_iter_at_line_offset (GtkTextBuffer *buffer, GtkTextIter *iter, gint line_number, gint char_offset) { g_return_if_fail (iter != NULL); g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); gtk_text_btree_get_iter_at_line_char (get_btree (buffer), iter, line_number, char_offset); } void gtk_text_buffer_get_iter_at_line_index (GtkTextBuffer *buffer, GtkTextIter *iter, gint line_number, gint byte_index) { g_return_if_fail (iter != NULL); g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); gtk_text_btree_get_iter_at_line_byte (get_btree (buffer), iter, line_number, byte_index); } void gtk_text_buffer_get_iter_at_line (GtkTextBuffer *buffer, GtkTextIter *iter, gint line_number) { g_return_if_fail (iter != NULL); g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); gtk_text_buffer_get_iter_at_line_offset (buffer, iter, line_number, 0); } void gtk_text_buffer_get_iter_at_offset (GtkTextBuffer *buffer, GtkTextIter *iter, gint char_offset) { g_return_if_fail (iter != NULL); g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); gtk_text_btree_get_iter_at_char (get_btree (buffer), iter, char_offset); } void gtk_text_buffer_get_last_iter (GtkTextBuffer *buffer, GtkTextIter *iter) { g_return_if_fail (iter != NULL); g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); gtk_text_btree_get_last_iter (get_btree (buffer), iter); } void gtk_text_buffer_get_bounds (GtkTextBuffer *buffer, GtkTextIter *start, GtkTextIter *end) { g_return_if_fail (start != NULL); g_return_if_fail (end != NULL); g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); gtk_text_btree_get_iter_at_char (get_btree (buffer), start, 0); gtk_text_btree_get_last_iter (get_btree (buffer), end); } /* * Modified flag */ gboolean gtk_text_buffer_modified (GtkTextBuffer *buffer) { g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE); return buffer->modified; } void gtk_text_buffer_set_modified (GtkTextBuffer *buffer, gboolean setting) { gboolean fixed_setting; g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer)); fixed_setting = setting != FALSE; if (buffer->modified == fixed_setting) return; else { buffer->modified = fixed_setting; gtk_signal_emit (GTK_OBJECT (buffer), signals[MODIFIED_CHANGED]); } } /* * Assorted other stuff */ gint gtk_text_buffer_get_line_count (GtkTextBuffer *buffer) { g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), 0); return gtk_text_btree_line_count (get_btree (buffer)); } gint gtk_text_buffer_get_char_count (GtkTextBuffer *buffer) { g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), 0); return gtk_text_btree_char_count (get_btree (buffer)); } /* Called when we lose the primary selection. */ static void clipboard_clear_selection_cb (GtkClipboard *clipboard, gpointer data) { /* Move selection_bound to the insertion point */ GtkTextIter insert; GtkTextIter selection_bound; GtkTextBuffer *buffer = GTK_TEXT_BUFFER (data); gtk_text_buffer_get_iter_at_mark (buffer, &insert, gtk_text_buffer_get_mark (buffer, "insert")); gtk_text_buffer_get_iter_at_mark (buffer, &selection_bound, gtk_text_buffer_get_mark (buffer, "selection_bound")); if (!gtk_text_iter_equal (&insert, &selection_bound)) gtk_text_buffer_move_mark (buffer, gtk_text_buffer_get_mark (buffer, "selection_bound"), &insert); } /* Called when we have the primary selection and someone else wants our * data in order to paste it. */ static void clipboard_get_selection_cb (GtkClipboard *clipboard, GtkSelectionData *selection_data, guint info, gpointer data) { GtkTextBuffer *buffer = GTK_TEXT_BUFFER (data); GtkTextIter start, end; if (gtk_text_buffer_get_selection_bounds (buffer, &start, &end)) { if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE)) { /* Provide the address of the buffer; this will only be * used within-process */ gtk_selection_data_set (selection_data, gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE), 8, /* bytes */ (void*)&buffer, sizeof (buffer)); } else { gchar *str; str = gtk_text_iter_get_visible_text (&start, &end); gtk_selection_data_set_text (selection_data, str); g_free (str); } } } /* Provide cut/copied data */ static void clipboard_get_contents_cb (GtkClipboard *clipboard, GtkSelectionData *selection_data, guint info, gpointer data) { GtkTextBuffer *buffer = GTK_TEXT_BUFFER (data); GtkTextBuffer *contents = buffer->clipboard_contents; if (selection_data->target == gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE)) { /* Provide the address of the clipboard buffer; this will only * be used within-process. OK to supply a NULL value for contents. */ gtk_selection_data_set (selection_data, gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE), 8, /* bytes */ (void*)&contents, sizeof (contents)); } else { /* Just provide text from the clipboard buffer */ if (buffer->clipboard_contents) { gchar *str; GtkTextIter start, end; gtk_text_buffer_get_bounds (contents, &start, &end); /* strip off the trailing newline, it isn't part of the text that was cut */ gtk_text_iter_backward_char (&end); str = gtk_text_iter_get_visible_text (&start, &end); gtk_selection_data_set_text (selection_data, str); g_free (str); } else { gtk_selection_data_set_text (selection_data, ""); return; } } } static void clipboard_clear_contents_cb (GtkClipboard *clipboard, gpointer data) { GtkTextBuffer *buffer = GTK_TEXT_BUFFER (data); if (buffer->clipboard_contents) { g_object_unref (G_OBJECT (buffer->clipboard_contents)); buffer->clipboard_contents = NULL; } } static void get_paste_point (GtkTextBuffer *buffer, GtkTextIter *iter, gboolean clear_afterward) { GtkTextIter insert_point; GtkTextMark *paste_point_override; paste_point_override = gtk_text_buffer_get_mark (buffer, "gtk_paste_point_override"); if (paste_point_override != NULL) { gtk_text_buffer_get_iter_at_mark (buffer, &insert_point, paste_point_override); if (clear_afterward) gtk_text_buffer_delete_mark (buffer, gtk_text_buffer_get_mark (buffer, "gtk_paste_point_override")); } else { gtk_text_buffer_get_iter_at_mark (buffer, &insert_point, gtk_text_buffer_get_mark (buffer, "insert")); } *iter = insert_point; } static void pre_paste_prep (ClipboardRequest *request_data, GtkTextIter *insert_point) { GtkTextBuffer *buffer = request_data->buffer; get_paste_point (buffer, insert_point, TRUE); /* If we're going to replace the selection, we insert before it to * avoid messing it up, then we delete the selection after inserting. */ if (request_data->replace_selection) { GtkTextIter start, end; if (gtk_text_buffer_get_selection_bounds (buffer, &start, &end)) *insert_point = start; } } static void post_paste_cleanup (ClipboardRequest *request_data) { if (request_data->replace_selection) { GtkTextIter start, end; if (gtk_text_buffer_get_selection_bounds (request_data->buffer, &start, &end)) { if (request_data->interactive) gtk_text_buffer_delete_interactive (request_data->buffer, &start, &end, request_data->default_editable); else gtk_text_buffer_delete (request_data->buffer, &start, &end); } } } /* Called when we request a paste and receive the text data */ static void clipboard_text_received (GtkClipboard *clipboard, const gchar *str, gpointer data) { ClipboardRequest *request_data = data; GtkTextBuffer *buffer = request_data->buffer; if (str) { GtkTextIter insert_point; pre_paste_prep (request_data, &insert_point); if (request_data->interactive) gtk_text_buffer_insert_interactive (buffer, &insert_point, str, -1, request_data->default_editable); else gtk_text_buffer_insert (buffer, &insert_point, str, -1); post_paste_cleanup (request_data); } g_object_unref (G_OBJECT (buffer)); g_free (request_data); } static GtkTextBuffer* selection_data_get_buffer (GtkSelectionData *selection_data, ClipboardRequest *request_data) { GdkWindow *owner; GtkTextBuffer *src_buffer = NULL; /* If we can get the owner, the selection is in-process */ owner = gdk_selection_owner_get (selection_data->selection); if (owner == NULL) return NULL; if (selection_data->type != gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE)) return NULL; if (selection_data->length != sizeof (src_buffer)) return NULL; memcpy (&src_buffer, selection_data->data, sizeof (src_buffer)); if (src_buffer == NULL) return NULL; g_return_val_if_fail (GTK_IS_TEXT_BUFFER (src_buffer), NULL); if (gtk_text_buffer_get_tag_table (src_buffer) != gtk_text_buffer_get_tag_table (request_data->buffer)) return NULL; return src_buffer; } #if 0 /* These are pretty handy functions; maybe something like them * should be in the public API. Also, there are other places in this * file where they could be used. */ static gpointer save_iter (const GtkTextIter *iter, gboolean left_gravity) { return gtk_text_buffer_create_mark (gtk_text_iter_get_buffer (iter), NULL, iter, TRUE); } static void restore_iter (const GtkTextIter *iter, gpointer save_id) { gtk_text_buffer_get_iter_at_mark (gtk_text_mark_get_buffer (save_id), (GtkTextIter*) iter, save_id); gtk_text_buffer_delete_mark (gtk_text_mark_get_buffer (save_id), save_id); } #endif static void paste_from_buffer (ClipboardRequest *request_data, GtkTextBuffer *src_buffer, const GtkTextIter *start, const GtkTextIter *end) { GtkTextIter insert_point; /* We're about to emit a bunch of signals, so be safe */ g_object_ref (G_OBJECT (src_buffer)); pre_paste_prep (request_data, &insert_point); if (!gtk_text_iter_equal (start, end)) { gtk_text_buffer_real_insert_range (request_data->buffer, &insert_point, start, end, request_data->interactive); } post_paste_cleanup (request_data); g_object_unref (G_OBJECT (src_buffer)); } static void clipboard_clipboard_buffer_received (GtkClipboard *clipboard, GtkSelectionData *selection_data, gpointer data) { ClipboardRequest *request_data = data; GtkTextBuffer *src_buffer; src_buffer = selection_data_get_buffer (selection_data, request_data); if (src_buffer) { GtkTextIter start, end; gtk_text_buffer_get_bounds (src_buffer, &start, &end); /* There's an extra newline on clipboard_contents */ gtk_text_iter_backward_char (&end); paste_from_buffer (request_data, src_buffer, &start, &end); } else { /* Request the text selection instead */ gtk_clipboard_request_text (clipboard, clipboard_text_received, data); } } static void clipboard_selection_buffer_received (GtkClipboard *clipboard, GtkSelectionData *selection_data, gpointer data) { ClipboardRequest *request_data = data; GtkTextBuffer *src_buffer; src_buffer = selection_data_get_buffer (selection_data, request_data); if (src_buffer) { GtkTextIter start, end; if (gtk_text_buffer_get_selection_bounds (src_buffer, &start, &end)) paste_from_buffer (request_data, src_buffer, &start, &end); } else { /* Request the text selection instead */ gtk_clipboard_request_text (clipboard, clipboard_text_received, data); } } static const GtkTargetEntry targets[] = { { "STRING", 0, TARGET_STRING }, { "TEXT", 0, TARGET_TEXT }, { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT }, { "UTF8_STRING", 0, TARGET_UTF8_STRING }, { "GTK_TEXT_BUFFER_CONTENTS", 0, TARGET_TEXT_BUFFER_CONTENTS } }; static void gtk_text_buffer_update_primary_selection (GtkTextBuffer *buffer) { GtkTextIter start; GtkTextIter end; GtkClipboard *clipboard = gtk_clipboard_get (GDK_SELECTION_PRIMARY); /* Determine whether we have a selection and adjust X selection * accordingly. */ if (!gtk_text_buffer_get_selection_bounds (buffer, &start, &end)) { if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (buffer)) gtk_clipboard_clear (clipboard); } else { /* Even if we already have the selection, we need to update our * timestamp. */ if (!gtk_clipboard_set_with_owner (clipboard, targets, G_N_ELEMENTS (targets), clipboard_get_selection_cb, clipboard_clear_selection_cb, G_OBJECT (buffer))) clipboard_clear_selection_cb (clipboard, buffer); } } static void paste (GtkTextBuffer *buffer, gboolean is_clipboard, gboolean interactive, gboolean default_editable) { ClipboardRequest *data = g_new (ClipboardRequest, 1); GtkTextIter paste_point; GtkTextIter start, end; data->buffer = buffer; g_object_ref (G_OBJECT (buffer)); data->interactive = interactive; data->default_editable = default_editable; /* When pasting with the cursor inside the selection area, you * replace the selection with the new text, otherwise, you * simply insert the new text at the point where the click * occured, unselecting any selected text. The replace_selection * flag toggles this behavior. */ data->replace_selection = FALSE; get_paste_point (buffer, &paste_point, FALSE); if (gtk_text_buffer_get_selection_bounds (buffer, &start, &end) && (gtk_text_iter_in_range (&paste_point, &start, &end) || gtk_text_iter_equal (&paste_point, &end))) data->replace_selection = TRUE; if (is_clipboard) gtk_clipboard_request_contents (gtk_clipboard_get (GDK_NONE), gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE), clipboard_clipboard_buffer_received, data); else gtk_clipboard_request_contents (gtk_clipboard_get (GDK_SELECTION_PRIMARY), gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE), clipboard_selection_buffer_received, data); } void gtk_text_buffer_paste_primary (GtkTextBuffer *buffer, const GtkTextIter *override_location, gboolean default_editable) { if (override_location != NULL) gtk_text_buffer_create_mark (buffer, "gtk_paste_point_override", override_location, FALSE); paste (buffer, FALSE, TRUE, default_editable); } void gtk_text_buffer_paste_clipboard (GtkTextBuffer *buffer, gboolean default_editable) { paste (buffer, TRUE, TRUE, default_editable); } gboolean gtk_text_buffer_delete_selection (GtkTextBuffer *buffer, gboolean interactive, gboolean default_editable) { GtkTextIter start; GtkTextIter end; if (!gtk_text_buffer_get_selection_bounds (buffer, &start, &end)) { return FALSE; /* No selection */ } else { if (interactive) gtk_text_buffer_delete_interactive (buffer, &start, &end, default_editable); else gtk_text_buffer_delete (buffer, &start, &end); return TRUE; /* We deleted stuff */ } } static void cut_or_copy (GtkTextBuffer *buffer, gboolean delete_region_after, gboolean interactive, gboolean default_editable) { /* We prefer to cut the selected region between selection_bound and * insertion point. If that region is empty, then we cut the region * between the "anchor" and the insertion point (this is for * C-space and M-w and other Emacs-style copy/yank keys). Note that * insert and selection_bound are guaranteed to exist, but the * anchor only exists sometimes. */ GtkTextIter start; GtkTextIter end; if (buffer->clipboard_contents) { g_object_unref (G_OBJECT (buffer->clipboard_contents)); buffer->clipboard_contents = NULL; } if (!gtk_text_buffer_get_selection_bounds (buffer, &start, &end)) { /* Let's try the anchor thing */ GtkTextMark * anchor = gtk_text_buffer_get_mark (buffer, "anchor"); if (anchor == NULL) return; else { gtk_text_buffer_get_iter_at_mark (buffer, &end, anchor); gtk_text_iter_reorder (&start, &end); } } if (!gtk_text_iter_equal (&start, &end)) { GtkClipboard *clipboard = gtk_clipboard_get (GDK_NONE); GtkTextIter ins; buffer->clipboard_contents = gtk_text_buffer_new (gtk_text_buffer_get_tag_table (buffer)); gtk_text_buffer_get_iter_at_offset (buffer->clipboard_contents, &ins, 0); gtk_text_buffer_insert_range (buffer->clipboard_contents, &ins, &start, &end); if (!gtk_clipboard_set_with_owner (clipboard, targets, G_N_ELEMENTS (targets), clipboard_get_contents_cb, clipboard_clear_contents_cb, G_OBJECT (buffer))) clipboard_clear_contents_cb (clipboard, buffer); if (delete_region_after) { if (interactive) gtk_text_buffer_delete_interactive (buffer, &start, &end, default_editable); else gtk_text_buffer_delete (buffer, &start, &end); } } } void gtk_text_buffer_cut_clipboard (GtkTextBuffer *buffer, gboolean default_editable) { cut_or_copy (buffer, TRUE, TRUE, default_editable); } void gtk_text_buffer_copy_clipboard (GtkTextBuffer *buffer) { cut_or_copy (buffer, FALSE, TRUE, TRUE); } /** * gtk_text_buffer_get_selection_bounds: * @buffer: a #GtkTextBuffer * @start: iterator to initialize with selection start * @end: iterator to initialize with selection end * * Returns %TRUE if some text is selected; places the bounds * of the selection in @start and @end (if the selection has length 0, * then @start and @end are filled in with the same value). * @start and @end will be in ascending order. If @start and @end are * NULL, then they are not filled in, but the return value still indicates * whether text is selected. * * Return value: whether the selection has nonzero length **/ gboolean gtk_text_buffer_get_selection_bounds (GtkTextBuffer *buffer, GtkTextIter *start, GtkTextIter *end) { g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE); return gtk_text_btree_get_selection_bounds (get_btree (buffer), start, end); } /* * Logical attribute cache */ #define ATTR_CACHE_SIZE 2 typedef struct _CacheEntry CacheEntry; struct _CacheEntry { gint line; gint char_len; PangoLogAttr *attrs; }; struct _GtkTextLogAttrCache { gint chars_changed_stamp; CacheEntry entries[ATTR_CACHE_SIZE]; }; static void free_log_attr_cache (GtkTextLogAttrCache *cache) { gint i = 0; while (i < ATTR_CACHE_SIZE) { g_free (cache->entries[i].attrs); ++i; } g_free (cache); } static void clear_log_attr_cache (GtkTextLogAttrCache *cache) { gint i = 0; while (i < ATTR_CACHE_SIZE) { g_free (cache->entries[i].attrs); cache->entries[i].attrs = NULL; ++i; } } static PangoLogAttr* compute_log_attrs (const GtkTextIter *iter, gint *char_lenp) { GtkTextIter start; GtkTextIter end; gchar *paragraph; gint char_len, byte_len; PangoLogAttr *attrs = NULL; gchar *lang; start = *iter; end = *iter; gtk_text_iter_set_line_offset (&start, 0); gtk_text_iter_forward_line (&end); paragraph = gtk_text_iter_get_slice (&start, &end); char_len = g_utf8_strlen (paragraph, -1); byte_len = strlen (paragraph); g_assert (char_len > 0); if (char_lenp) *char_lenp = char_len; attrs = g_new (PangoLogAttr, char_len); lang = gtk_text_iter_get_language (&start); pango_get_log_attrs (paragraph, byte_len, -1, lang, attrs); g_free (lang); g_free (paragraph); return attrs; } /* The return value from this is valid until you call this a second time. */ const PangoLogAttr* _gtk_text_buffer_get_line_log_attrs (GtkTextBuffer *buffer, const GtkTextIter *anywhere_in_line, gint *char_len) { gint line; GtkTextLogAttrCache *cache; gint i; g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL); g_return_val_if_fail (anywhere_in_line != NULL, NULL); g_return_val_if_fail (!gtk_text_iter_is_last (anywhere_in_line), NULL); /* FIXME we also need to recompute log attrs if the language tag at * the start of a paragraph changes */ if (buffer->log_attr_cache == NULL) { buffer->log_attr_cache = g_new0 (GtkTextLogAttrCache, 1); buffer->log_attr_cache->chars_changed_stamp = gtk_text_btree_get_chars_changed_stamp (get_btree (buffer)); } else if (buffer->log_attr_cache->chars_changed_stamp != gtk_text_btree_get_chars_changed_stamp (get_btree (buffer))) { clear_log_attr_cache (buffer->log_attr_cache); } cache = buffer->log_attr_cache; line = gtk_text_iter_get_line (anywhere_in_line); i = 0; while (i < ATTR_CACHE_SIZE) { if (cache->entries[i].attrs && cache->entries[i].line == line) { if (char_len) *char_len = cache->entries[i].char_len; return cache->entries[i].attrs; } ++i; } /* Not in cache; open up the first cache entry */ if (cache->entries[ATTR_CACHE_SIZE-1].attrs) g_free (cache->entries[ATTR_CACHE_SIZE-1].attrs); g_memmove (cache->entries + 1, cache->entries, sizeof (CacheEntry) * (ATTR_CACHE_SIZE - 1)); cache->entries[0].line = line; cache->entries[0].attrs = compute_log_attrs (anywhere_in_line, &cache->entries[0].char_len); if (char_len) *char_len = cache->entries[0].char_len; return cache->entries[0].attrs; } /* * Debug spew */ void _gtk_text_buffer_spew (GtkTextBuffer *buffer) { gtk_text_btree_spew (get_btree (buffer)); }