/* GTK - The GIMP Toolkit * gtktextlayout.c - calculate the layout of the text * * Copyright (c) 1992-1994 The Regents of the University of California. * Copyright (c) 1994-1997 Sun Microsystems, Inc. * Copyright (c) 2000 Red Hat, Inc. * Tk->Gtk port by Havoc Pennington * Pango support by Owen Taylor * * This file can be used under your choice of two licenses, the LGPL * and the original Tk license. * * LGPL: * * 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, see .Free * * Original Tk license: * * This software is copyrighted by the Regents of the University of * California, Sun Microsystems, Inc., and other parties. The * following terms apply to all files associated with the software * unless explicitly disclaimed in individual files. * * The authors hereby grant permission to use, copy, modify, * distribute, and license this software and its documentation for any * purpose, provided that existing copyright notices are retained in * all copies and that this notice is included verbatim in any * distributions. No written agreement, license, or royalty fee is * required for any of the authorized uses. Modifications to this * software may be copyrighted by their authors and need not follow * the licensing terms described here, provided that the new terms are * clearly indicated on the first page of each file where they apply. * * IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL * DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, * OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND * NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, * AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE * MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. * * GOVERNMENT USE: If you are acquiring this software on behalf of the * U.S. government, the Government shall have only "Restricted Rights" * in the software and related documentation as defined in the Federal * Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you * are acquiring the software on behalf of the Department of Defense, * the software shall be classified as "Commercial Computer Software" * and the Government shall have only "Restricted Rights" as defined * in Clause 252.227-7013 (c) (1) of DFARs. Notwithstanding the * foregoing, the authors grant the U.S. Government and others acting * in its behalf permission to use and distribute the software in * accordance with the terms specified in this license. * */ /* * 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 "config.h" #include "gtktextlayoutprivate.h" #include "gtkcsscolorvalueprivate.h" #include "gtkmarshalers.h" #include "gtkstylecontextprivate.h" #include "gtktextbtree.h" #include "gtktextbufferprivate.h" #include "gtktextiterprivate.h" #include "gtktextlinedisplaycacheprivate.h" #include "gtktextutil.h" #include "gskpango.h" #include "gtkintl.h" #include "gtksnapshotprivate.h" #include "gtkwidgetprivate.h" #include "gtktextviewprivate.h" #include #include #define GTK_TEXT_LAYOUT_GET_PRIVATE(o) ((GtkTextLayoutPrivate *) gtk_text_layout_get_instance_private ((o))) typedef struct _GtkTextLayoutPrivate GtkTextLayoutPrivate; struct _GtkTextLayoutPrivate { /* Cache the line that the cursor is positioned on, as the keyboard direction only influences the direction of the cursor line. */ GtkTextLine *cursor_line; /* Cache for GtkTextLineDisplay to reduce overhead creating layouts */ GtkTextLineDisplayCache *cache; }; static void gtk_text_layout_invalidated (GtkTextLayout *layout); static void gtk_text_layout_invalidate_cache (GtkTextLayout *layout, GtkTextLine *line, gboolean cursors_only); static void gtk_text_layout_invalidate_cursor_line (GtkTextLayout *layout, gboolean cursors_only); static void gtk_text_layout_emit_changed (GtkTextLayout *layout, int y, int old_height, int new_height); static void gtk_text_layout_invalidate_all (GtkTextLayout *layout); static PangoAttribute *gtk_text_attr_appearance_new (const GtkTextAppearance *appearance); static void gtk_text_layout_after_mark_set_handler (GtkTextBuffer *buffer, const GtkTextIter *location, GtkTextMark *mark, gpointer data); static void gtk_text_layout_after_buffer_insert_text (GtkTextBuffer *textbuffer, GtkTextIter *iter, char *str, int len, gpointer data); static void gtk_text_layout_after_buffer_delete_range (GtkTextBuffer *textbuffer, GtkTextIter *start, GtkTextIter *end, gpointer data); static void gtk_text_layout_before_mark_set_handler (GtkTextBuffer *buffer, const GtkTextIter *location, GtkTextMark *mark, gpointer data); static void gtk_text_layout_before_buffer_insert_text (GtkTextBuffer *textbuffer, GtkTextIter *iter, char *str, int len, gpointer data); static void gtk_text_layout_before_buffer_delete_range (GtkTextBuffer *textbuffer, GtkTextIter *start, GtkTextIter *end, gpointer data); static void gtk_text_layout_update_cursor_line (GtkTextLayout *layout); static void line_display_index_to_iter (GtkTextLayout *layout, GtkTextLineDisplay*display, GtkTextIter *iter, int index, int trailing); static int line_display_iter_to_index (GtkTextLayout *layout, GtkTextLineDisplay*display, const GtkTextIter *iter); enum { INVALIDATED, CHANGED, ALLOCATE_CHILD, LAST_SIGNAL }; enum { ARG_0, LAST_ARG }; #define PIXEL_BOUND(d) (((d) + PANGO_SCALE - 1) / PANGO_SCALE) static guint signals[LAST_SIGNAL] = { 0 }; PangoAttrType gtk_text_attr_appearance_type = 0; G_DEFINE_TYPE_WITH_PRIVATE (GtkTextLayout, gtk_text_layout, G_TYPE_OBJECT) static void gtk_text_layout_dispose (GObject *object) { GtkTextLayout *layout = GTK_TEXT_LAYOUT (object); GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout); g_clear_pointer (&priv->cache, gtk_text_line_display_cache_free); gtk_text_layout_set_buffer (layout, NULL); if (layout->default_style != NULL) { gtk_text_attributes_unref (layout->default_style); layout->default_style = NULL; } g_clear_object (&layout->ltr_context); g_clear_object (&layout->rtl_context); if (layout->preedit_attrs != NULL) { pango_attr_list_unref (layout->preedit_attrs); layout->preedit_attrs = NULL; } G_OBJECT_CLASS (gtk_text_layout_parent_class)->dispose (object); } static void gtk_text_layout_finalize (GObject *object) { GtkTextLayout *layout; layout = GTK_TEXT_LAYOUT (object); g_free (layout->preedit_string); G_OBJECT_CLASS (gtk_text_layout_parent_class)->finalize (object); } static void gtk_text_layout_class_init (GtkTextLayoutClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); object_class->dispose = gtk_text_layout_dispose; object_class->finalize = gtk_text_layout_finalize; signals[INVALIDATED] = g_signal_new (I_("invalidated"), G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 0); signals[CHANGED] = g_signal_new (I_("changed"), G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_LAST, 0, NULL, NULL, _gtk_marshal_VOID__INT_INT_INT, G_TYPE_NONE, 3, G_TYPE_INT, G_TYPE_INT, G_TYPE_INT); g_signal_set_va_marshaller (signals[CHANGED], G_TYPE_FROM_CLASS (klass), _gtk_marshal_VOID__INT_INT_INTv); signals[ALLOCATE_CHILD] = g_signal_new (I_("allocate-child"), G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_LAST, 0, NULL, NULL, _gtk_marshal_VOID__OBJECT_INT_INT, G_TYPE_NONE, 3, G_TYPE_OBJECT, G_TYPE_INT, G_TYPE_INT); } static void gtk_text_layout_init (GtkTextLayout *text_layout) { GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (text_layout); text_layout->cursor_visible = TRUE; priv->cache = gtk_text_line_display_cache_new (); } GtkTextLayout* gtk_text_layout_new (void) { return g_object_new (GTK_TYPE_TEXT_LAYOUT, NULL); } static void free_style_cache (GtkTextLayout *text_layout) { if (text_layout->one_style_cache) { gtk_text_attributes_unref (text_layout->one_style_cache); text_layout->one_style_cache = NULL; } } /* * gtk_text_layout_set_buffer: * @buffer: (nullable): */ void gtk_text_layout_set_buffer (GtkTextLayout *layout, GtkTextBuffer *buffer) { g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer)); if (layout->buffer == buffer) return; free_style_cache (layout); if (layout->buffer) { _gtk_text_btree_remove_view (_gtk_text_buffer_get_btree (layout->buffer), layout); g_signal_handlers_disconnect_by_func (layout->buffer, G_CALLBACK (gtk_text_layout_after_mark_set_handler), layout); g_signal_handlers_disconnect_by_func (layout->buffer, G_CALLBACK (gtk_text_layout_after_buffer_insert_text), layout); g_signal_handlers_disconnect_by_func (layout->buffer, G_CALLBACK (gtk_text_layout_after_buffer_delete_range), layout); g_signal_handlers_disconnect_by_func (layout->buffer, G_CALLBACK (gtk_text_layout_before_mark_set_handler), layout); g_signal_handlers_disconnect_by_func (layout->buffer, G_CALLBACK (gtk_text_layout_before_buffer_insert_text), layout); g_signal_handlers_disconnect_by_func (layout->buffer, G_CALLBACK (gtk_text_layout_before_buffer_delete_range), layout); g_object_unref (layout->buffer); layout->buffer = NULL; } if (buffer) { layout->buffer = buffer; g_object_ref (buffer); _gtk_text_btree_add_view (_gtk_text_buffer_get_btree (buffer), layout); /* Bind to all signals that move the insert mark. */ g_signal_connect_after (layout->buffer, "mark-set", G_CALLBACK (gtk_text_layout_after_mark_set_handler), layout); g_signal_connect_after (layout->buffer, "insert-text", G_CALLBACK (gtk_text_layout_after_buffer_insert_text), layout); g_signal_connect_after (layout->buffer, "delete-range", G_CALLBACK (gtk_text_layout_after_buffer_delete_range), layout); g_signal_connect (layout->buffer, "mark-set", G_CALLBACK (gtk_text_layout_before_mark_set_handler), layout); g_signal_connect (layout->buffer, "insert-text", G_CALLBACK (gtk_text_layout_before_buffer_insert_text), layout); g_signal_connect (layout->buffer, "delete-range", G_CALLBACK (gtk_text_layout_before_buffer_delete_range), layout); gtk_text_layout_update_cursor_line (layout); } } void gtk_text_layout_default_style_changed (GtkTextLayout *layout) { g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); DV (g_print ("invalidating all due to default style change (%s)\n", G_STRLOC)); gtk_text_layout_invalidate_all (layout); } void gtk_text_layout_set_default_style (GtkTextLayout *layout, GtkTextAttributes *values) { g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); g_return_if_fail (values != NULL); if (values == layout->default_style) return; gtk_text_attributes_ref (values); if (layout->default_style) gtk_text_attributes_unref (layout->default_style); layout->default_style = values; gtk_text_layout_default_style_changed (layout); } void gtk_text_layout_set_contexts (GtkTextLayout *layout, PangoContext *ltr_context, PangoContext *rtl_context) { g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); if (layout->ltr_context != ltr_context) { if (layout->ltr_context) g_object_unref (layout->ltr_context); layout->ltr_context = ltr_context; g_object_ref (layout->ltr_context); } if (layout->rtl_context != rtl_context) { if (layout->rtl_context) g_object_unref (layout->rtl_context); layout->rtl_context = rtl_context; g_object_ref (layout->rtl_context); } DV (g_print ("invalidating all due to new pango contexts (%s)\n", G_STRLOC)); gtk_text_layout_invalidate_all (layout); } /** * gtk_text_layout_set_overwrite_mode: * @layout: a `GtkTextLayout` * @overwrite: overwrite mode * * Sets overwrite mode */ void gtk_text_layout_set_overwrite_mode (GtkTextLayout *layout, gboolean overwrite) { overwrite = overwrite != 0; if (overwrite != layout->overwrite_mode) { layout->overwrite_mode = overwrite; gtk_text_layout_invalidate_cursor_line (layout, TRUE); } } /** * gtk_text_layout_set_cursor_direction: * @direction: the new direction(s) for which to draw cursors. * %GTK_TEXT_DIR_NONE means draw cursors for both * left-to-right insertion and right-to-left insertion. * (The two cursors will be visually distinguished.) * * Sets which text directions (left-to-right and/or right-to-left) for * which cursors will be drawn for the insertion point. The visual * point at which new text is inserted depends on whether the new * text is right-to-left or left-to-right, so it may be desired to * make the drawn position of the cursor depend on the keyboard state. */ void gtk_text_layout_set_cursor_direction (GtkTextLayout *layout, GtkTextDirection direction) { if (direction != layout->cursor_direction) { layout->cursor_direction = direction; gtk_text_layout_invalidate_cursor_line (layout, TRUE); } } /** * gtk_text_layout_set_keyboard_direction: * @keyboard_dir: the current direction of the keyboard. * * Sets the keyboard direction; this is used as for the bidirectional * base direction for the line with the cursor if the line contains * only neutral characters. */ void gtk_text_layout_set_keyboard_direction (GtkTextLayout *layout, GtkTextDirection keyboard_dir) { if (keyboard_dir != layout->keyboard_direction) { layout->keyboard_direction = keyboard_dir; gtk_text_layout_invalidate_cursor_line (layout, TRUE); } } /** * gtk_text_layout_get_buffer: * @layout: a `GtkTextLayout` * * Gets the text buffer used by the layout. See * gtk_text_layout_set_buffer(). * * Returns: the text buffer used by the layout. */ GtkTextBuffer * gtk_text_layout_get_buffer (GtkTextLayout *layout) { g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), NULL); return layout->buffer; } void gtk_text_layout_set_screen_width (GtkTextLayout *layout, int width) { g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); g_return_if_fail (width >= 0); g_return_if_fail (layout->wrap_loop_count == 0); if (layout->screen_width == width) return; layout->screen_width = width; DV (g_print ("invalidating all due to new screen width (%s)\n", G_STRLOC)); gtk_text_layout_invalidate_all (layout); } /** * gtk_text_layout_set_cursor_visible: * @layout: a `GtkTextLayout` * @cursor_visible: If %FALSE, then the insertion cursor will not * be shown, even if the text is editable. * * Sets whether the insertion cursor should be shown. Generally, * widgets using `GtkTextLayout` will hide the cursor when the * widget does not have the input focus. */ void gtk_text_layout_set_cursor_visible (GtkTextLayout *layout, gboolean cursor_visible) { cursor_visible = (cursor_visible != FALSE); if (layout->cursor_visible != cursor_visible) { GtkTextIter iter; int y, height; layout->cursor_visible = cursor_visible; /* Now queue a redraw on the paragraph containing the cursor */ gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter, gtk_text_buffer_get_insert (layout->buffer)); gtk_text_layout_get_line_yrange (layout, &iter, &y, &height); gtk_text_layout_emit_changed (layout, y, height, height); gtk_text_layout_invalidate_cache (layout, _gtk_text_iter_get_text_line (&iter), TRUE); } } /** * gtk_text_layout_get_cursor_visible: * @layout: a `GtkTextLayout` * * Returns whether the insertion cursor will be shown. * * Returns: if %FALSE, the insertion cursor will not be * shown, even if the text is editable. */ gboolean gtk_text_layout_get_cursor_visible (GtkTextLayout *layout) { return layout->cursor_visible; } /** * gtk_text_layout_set_preedit_string: * @layout: a `PangoLayout` * @preedit_string: a string to display at the insertion point * @preedit_attrs: a `PangoAttrList` of attributes that apply to @preedit_string * @cursor_pos: position of cursor within preedit string in chars * * Set the preedit string and attributes. The preedit string is a * string showing text that is currently being edited and not * yet committed into the buffer. */ void gtk_text_layout_set_preedit_string (GtkTextLayout *layout, const char *preedit_string, PangoAttrList *preedit_attrs, int cursor_pos) { g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); g_return_if_fail (preedit_attrs != NULL || preedit_string == NULL); g_free (layout->preedit_string); if (layout->preedit_attrs) pango_attr_list_unref (layout->preedit_attrs); if (preedit_string) { layout->preedit_string = g_strdup (preedit_string); layout->preedit_len = strlen (layout->preedit_string); pango_attr_list_ref (preedit_attrs); layout->preedit_attrs = preedit_attrs; cursor_pos = CLAMP (cursor_pos, 0, g_utf8_strlen (layout->preedit_string, -1)); layout->preedit_cursor = g_utf8_offset_to_pointer (layout->preedit_string, cursor_pos) - layout->preedit_string; } else { layout->preedit_string = NULL; layout->preedit_len = 0; layout->preedit_attrs = NULL; layout->preedit_cursor = 0; } gtk_text_layout_invalidate_cursor_line (layout, FALSE); } void gtk_text_layout_get_size (GtkTextLayout *layout, int *width, int *height) { g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); if (width) *width = layout->width; if (height) *height = layout->height; } static void gtk_text_layout_invalidated (GtkTextLayout *layout) { g_signal_emit (layout, signals[INVALIDATED], 0); } static void gtk_text_layout_emit_changed (GtkTextLayout *layout, int y, int old_height, int new_height) { g_signal_emit (layout, signals[CHANGED], 0, y, old_height, new_height); } void gtk_text_layout_changed (GtkTextLayout *layout, int y, int old_height, int new_height) { GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout); gtk_text_line_display_cache_invalidate_y_range (priv->cache, layout, y, old_height, new_height, FALSE); gtk_text_layout_emit_changed (layout, y, old_height, new_height); } void gtk_text_layout_cursors_changed (GtkTextLayout *layout, int y, int old_height, int new_height) { GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout); gtk_text_line_display_cache_invalidate_y_range (priv->cache, layout, y, old_height, new_height, TRUE); gtk_text_layout_emit_changed (layout, y, old_height, new_height); } static void invalidate_cached_style (GtkTextLayout *layout) { free_style_cache (layout); } /* These should be called around a loop which wraps a CONTIGUOUS bunch * of display lines. If the lines aren’t contiguous you can’t call * these. */ void gtk_text_layout_wrap_loop_start (GtkTextLayout *layout) { g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); g_return_if_fail (layout->one_style_cache == NULL); layout->wrap_loop_count += 1; } void gtk_text_layout_wrap_loop_end (GtkTextLayout *layout) { g_return_if_fail (layout->wrap_loop_count > 0); layout->wrap_loop_count -= 1; if (layout->wrap_loop_count == 0) { /* We cache a some stuff if we're iterating over some lines wrapping * them. This cleans it up. */ /* Nuke our cached style */ invalidate_cached_style (layout); g_assert (layout->one_style_cache == NULL); } } static void gtk_text_layout_invalidate_all (GtkTextLayout *layout) { GtkTextIter start; GtkTextIter end; if (layout->buffer == NULL) return; gtk_text_buffer_get_bounds (layout->buffer, &start, &end); gtk_text_layout_invalidate (layout, &start, &end); } static void gtk_text_layout_invalidate_cache (GtkTextLayout *layout, GtkTextLine *line, gboolean cursors_only) { GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout); g_assert (GTK_IS_TEXT_LAYOUT (layout)); if (priv->cache != NULL) { if (cursors_only) gtk_text_line_display_cache_invalidate_cursors (priv->cache, line); else gtk_text_line_display_cache_invalidate_line (priv->cache, line); } } /* Now invalidate the paragraph containing the cursor */ static void gtk_text_layout_invalidate_cursor_line (GtkTextLayout *layout, gboolean cursors_only) { GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout); GtkTextLineData *line_data; if (priv->cursor_line == NULL) return; line_data = _gtk_text_line_get_data (priv->cursor_line, layout); if (line_data != NULL) { gtk_text_layout_invalidate_cache (layout, priv->cursor_line, cursors_only); if (!cursors_only) _gtk_text_line_invalidate_wrap (priv->cursor_line, line_data); gtk_text_layout_invalidated (layout); } } static void gtk_text_layout_update_cursor_line (GtkTextLayout *layout) { GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout); GtkTextIter iter; gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter, gtk_text_buffer_get_insert (layout->buffer)); priv->cursor_line = _gtk_text_iter_get_text_line (&iter); gtk_text_line_display_cache_set_cursor_line (priv->cache, priv->cursor_line); } void gtk_text_layout_invalidate (GtkTextLayout *layout, const GtkTextIter *start, const GtkTextIter *end) { GtkTextLine *line; GtkTextLine *last_line; g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); g_return_if_fail (layout->wrap_loop_count == 0); /* Because we may be invalidating a mark, it's entirely possible * that gtk_text_iter_equal (start, end) in which case we * should still invalidate the line they are both on. i.e. * we always invalidate the line with "start" even * if there's an empty range. */ #if 0 gtk_text_view_index_spew (start_index, "invalidate start"); gtk_text_view_index_spew (end_index, "invalidate end"); #endif last_line = _gtk_text_iter_get_text_line (end); line = _gtk_text_iter_get_text_line (start); while (TRUE) { GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout); gtk_text_layout_invalidate_cache (layout, line, FALSE); if (line_data) _gtk_text_line_invalidate_wrap (line, line_data); if (line == last_line) break; line = _gtk_text_line_next_excluding_last (line); } gtk_text_layout_invalidated (layout); } void gtk_text_layout_invalidate_cursors (GtkTextLayout *layout, const GtkTextIter *start, const GtkTextIter *end) { GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout); gtk_text_line_display_cache_invalidate_range (priv->cache, layout, start, end, TRUE); gtk_text_layout_invalidated (layout); } void gtk_text_layout_invalidate_selection (GtkTextLayout *layout) { GtkTextIter selection_start, selection_end; g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); if (layout->buffer && gtk_text_buffer_get_selection_bounds (layout->buffer, &selection_start, &selection_end)) gtk_text_layout_invalidate (layout, &selection_start, &selection_end); } void gtk_text_layout_free_line_data (GtkTextLayout *layout, GtkTextLine *line, GtkTextLineData *line_data) { gtk_text_layout_invalidate_cache (layout, line, FALSE); g_slice_free (GtkTextLineData, line_data); } /** * gtk_text_layout_is_valid: * @layout: a `GtkTextLayout` * * Check if there are any invalid regions in a `GtkTextLayout`’s buffer * * Returns: %TRUE if any invalid regions were found */ gboolean gtk_text_layout_is_valid (GtkTextLayout *layout) { g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE); return _gtk_text_btree_is_valid (_gtk_text_buffer_get_btree (layout->buffer), layout); } static void update_layout_size (GtkTextLayout *layout) { _gtk_text_btree_get_view_size (_gtk_text_buffer_get_btree (layout->buffer), layout, &layout->width, &layout->height); } /** * gtk_text_layout_validate_yrange: * @layout: a `GtkTextLayout` * @anchor: iter pointing into a line that will be used as the * coordinate origin * @y0_: offset from the top of the line pointed to by @anchor at * which to begin validation. (The offset here is in pixels * after validation.) * @y1_: offset from the top of the line pointed to by @anchor at * which to end validation. (The offset here is in pixels * after validation.) * * Ensure that a region of a `GtkTextLayout` is valid. The ::changed * signal will be emitted if any lines are validated. */ void gtk_text_layout_validate_yrange (GtkTextLayout *layout, GtkTextIter *anchor, int y0, int y1) { GtkTextLine *line; GtkTextLine *first_line = NULL; GtkTextLine *last_line = NULL; int seen; int delta_height = 0; int first_line_y = 0; /* Quiet GCC */ int last_line_y = 0; /* Quiet GCC */ g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); if (y0 > 0) y0 = 0; if (y1 < 0) y1 = 0; /* Validate backwards from the anchor line to y0 */ line = _gtk_text_iter_get_text_line (anchor); line = _gtk_text_line_previous (line); seen = 0; while (line && seen < -y0) { GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout); if (!line_data || !line_data->valid) { int old_height, new_height; int top_ink, bottom_ink; old_height = line_data ? line_data->height : 0; top_ink = line_data ? line_data->top_ink : 0; bottom_ink = line_data ? line_data->bottom_ink : 0; _gtk_text_btree_validate_line (_gtk_text_buffer_get_btree (layout->buffer), line, layout); line_data = _gtk_text_line_get_data (line, layout); new_height = line_data ? line_data->height : 0; if (line_data) { top_ink = MAX (top_ink, line_data->top_ink); bottom_ink = MAX (bottom_ink, line_data->bottom_ink); } delta_height += new_height - old_height; first_line = line; first_line_y = -seen - new_height - top_ink; if (!last_line) { last_line = line; last_line_y = -seen + bottom_ink; } } seen += line_data ? line_data->height : 0; line = _gtk_text_line_previous (line); } /* Validate forwards to y1 */ line = _gtk_text_iter_get_text_line (anchor); seen = 0; while (line && seen < y1) { GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout); if (!line_data || !line_data->valid) { int old_height, new_height; int top_ink, bottom_ink; old_height = line_data ? line_data->height : 0; top_ink = line_data ? line_data->top_ink : 0; bottom_ink = line_data ? line_data->bottom_ink : 0; _gtk_text_btree_validate_line (_gtk_text_buffer_get_btree (layout->buffer), line, layout); line_data = _gtk_text_line_get_data (line, layout); new_height = line_data ? line_data->height : 0; if (line_data) { top_ink = MAX (top_ink, line_data->top_ink); bottom_ink = MAX (bottom_ink, line_data->bottom_ink); } delta_height += new_height - old_height; if (!first_line) { first_line = line; first_line_y = seen - top_ink; } last_line = line; last_line_y = seen + new_height + bottom_ink; } seen += line_data ? line_data->height : 0; line = _gtk_text_line_next_excluding_last (line); } /* If we found and validated any invalid lines, update size and * emit the changed signal */ if (first_line) { int line_top; update_layout_size (layout); line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer), first_line, layout); gtk_text_layout_emit_changed (layout, line_top, last_line_y - first_line_y - delta_height, last_line_y - first_line_y); } } /** * gtk_text_layout_validate: * @tree: a `GtkTextLayout` * @max_pixels: the maximum number of pixels to validate. (No more * than one paragraph beyond this limit will be validated) * * Validate regions of a `GtkTextLayout`. The ::changed signal will * be emitted for each region validated. **/ void gtk_text_layout_validate (GtkTextLayout *layout, int max_pixels) { GtkTextBTree *btree; int y, old_height, new_height; g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); btree = _gtk_text_buffer_get_btree (layout->buffer); while (max_pixels > 0 && _gtk_text_btree_validate (btree, layout, max_pixels, &y, &old_height, &new_height)) { max_pixels -= new_height; update_layout_size (layout); gtk_text_layout_emit_changed (layout, y, old_height, new_height); } } GtkTextLineData * gtk_text_layout_wrap (GtkTextLayout *layout, GtkTextLine *line, /* may be NULL */ GtkTextLineData *line_data) { GtkTextLineDisplay *display; PangoRectangle ink_rect, logical_rect; g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), NULL); g_return_val_if_fail (line != NULL, NULL); if (line_data == NULL) { line_data = _gtk_text_line_data_new (layout, line); _gtk_text_line_add_data (line, line_data); } display = gtk_text_layout_get_line_display (layout, line, TRUE); line_data->width = display->width; line_data->height = display->height; line_data->valid = TRUE; pango_layout_get_pixel_extents (display->layout, &ink_rect, &logical_rect); line_data->top_ink = MAX (0, logical_rect.x - ink_rect.x); line_data->bottom_ink = MAX (0, logical_rect.x + logical_rect.width - ink_rect.x - ink_rect.width); gtk_text_line_display_unref (display); return line_data; } /* * Layout utility functions */ /* If you get the style with get_style () you need to call release_style () to free it. */ static GtkTextAttributes* get_style (GtkTextLayout *layout, GPtrArray *tags) { GtkTextAttributes *style; /* If we have the one-style cache, then it means that we haven't seen a toggle since we filled in the one-style cache. */ if (layout->one_style_cache != NULL) { gtk_text_attributes_ref (layout->one_style_cache); return layout->one_style_cache; } g_assert (layout->one_style_cache == NULL); /* No tags, use default style */ if (tags == NULL || tags->len == 0) { /* One ref for the return value, one ref for the layout->one_style_cache reference */ gtk_text_attributes_ref (layout->default_style); gtk_text_attributes_ref (layout->default_style); layout->one_style_cache = layout->default_style; return layout->default_style; } style = gtk_text_attributes_new (); gtk_text_attributes_copy_values (layout->default_style, style); _gtk_text_attributes_fill_from_tags (style, tags); g_assert (style->refcount == 1); /* Leave this style as the last one seen */ g_assert (layout->one_style_cache == NULL); gtk_text_attributes_ref (style); /* ref held by layout->one_style_cache */ layout->one_style_cache = style; /* Returning yet another refcount */ return style; } static void release_style (GtkTextLayout *layout, GtkTextAttributes *style) { g_return_if_fail (style != NULL); g_return_if_fail (style->refcount > 0); gtk_text_attributes_unref (style); } /* * Lines */ /* This function tries to optimize the case where a line is completely invisible */ static gboolean totally_invisible_line (GtkTextLayout *layout, GtkTextLine *line, GtkTextIter *iter) { GtkTextLineSegment *seg; /* Check if the first char is visible, if so we are partially visible. * Note that we have to check this since we don't know the current * invisible/noninvisible toggle state; this function can use the whole btree * to get it right. */ gtk_text_layout_get_iter_at_line (layout, iter, line, 0); if (!_gtk_text_btree_char_is_invisible (iter)) return FALSE; seg = line->segments; while (seg != NULL) { if (seg->byte_count <= 0 && seg->type == >k_text_toggle_on_type) { invalidate_cached_style (layout); /* Bail out if an elision-unsetting tag begins */ if (seg->body.toggle.info->tag->priv->invisible_set && !seg->body.toggle.info->tag->priv->values->invisible) break; } else if (seg->type == >k_text_toggle_off_type) { invalidate_cached_style (layout); /* Bail out if an elision-setting tag ends */ if (seg->body.toggle.info->tag->priv->invisible_set && seg->body.toggle.info->tag->priv->values->invisible) break; } seg = seg->next; } if (seg != NULL) /* didn't reach line end */ return FALSE; return TRUE; } static void set_para_values (GtkTextLayout *layout, PangoDirection base_dir, GtkTextAttributes *style, GtkTextLineDisplay *display) { PangoAlignment pango_align = PANGO_ALIGN_LEFT; PangoWrapMode pango_wrap = PANGO_WRAP_WORD; int h_margin; int h_padding; switch (base_dir) { /* If no base direction was found, then use the style direction */ case PANGO_DIRECTION_NEUTRAL : display->direction = style->direction; /* Override the base direction */ if (display->direction == GTK_TEXT_DIR_RTL) base_dir = PANGO_DIRECTION_RTL; else base_dir = PANGO_DIRECTION_LTR; break; case PANGO_DIRECTION_RTL : display->direction = GTK_TEXT_DIR_RTL; break; case PANGO_DIRECTION_LTR: case PANGO_DIRECTION_TTB_LTR: case PANGO_DIRECTION_TTB_RTL: case PANGO_DIRECTION_WEAK_LTR: case PANGO_DIRECTION_WEAK_RTL: default: display->direction = GTK_TEXT_DIR_LTR; break; } if (display->direction == GTK_TEXT_DIR_RTL) display->layout = pango_layout_new (layout->rtl_context); else display->layout = pango_layout_new (layout->ltr_context); switch (style->justification) { case GTK_JUSTIFY_LEFT: pango_align = (base_dir == PANGO_DIRECTION_LTR) ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT; break; case GTK_JUSTIFY_RIGHT: pango_align = (base_dir == PANGO_DIRECTION_LTR) ? PANGO_ALIGN_RIGHT : PANGO_ALIGN_LEFT; break; case GTK_JUSTIFY_CENTER: pango_align = PANGO_ALIGN_CENTER; break; case GTK_JUSTIFY_FILL: pango_align = (base_dir == PANGO_DIRECTION_LTR) ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT; pango_layout_set_justify (display->layout, TRUE); break; default: g_assert_not_reached (); break; } pango_layout_set_alignment (display->layout, pango_align); pango_layout_set_spacing (display->layout, style->pixels_inside_wrap * PANGO_SCALE); if (style->tabs) pango_layout_set_tabs (display->layout, style->tabs); display->top_margin = style->pixels_above_lines; display->height = style->pixels_above_lines + style->pixels_below_lines; display->bottom_margin = style->pixels_below_lines; display->left_margin = style->left_margin; display->right_margin = style->right_margin; display->x_offset = display->left_margin; pango_layout_set_indent (display->layout, style->indent * PANGO_SCALE); switch (style->wrap_mode) { case GTK_WRAP_CHAR: pango_wrap = PANGO_WRAP_CHAR; break; case GTK_WRAP_WORD: pango_wrap = PANGO_WRAP_WORD; break; case GTK_WRAP_WORD_CHAR: pango_wrap = PANGO_WRAP_WORD_CHAR; break; case GTK_WRAP_NONE: default: break; } h_margin = display->left_margin + display->right_margin; h_padding = layout->left_padding + layout->right_padding; if (style->wrap_mode != GTK_WRAP_NONE) { int layout_width = (layout->screen_width - h_margin - h_padding); pango_layout_set_width (display->layout, layout_width * PANGO_SCALE); pango_layout_set_wrap (display->layout, pango_wrap); } display->total_width = MAX (layout->screen_width, layout->width) - h_margin - h_padding; if (style->pg_bg_rgba) { display->pg_bg_rgba = *style->pg_bg_rgba; display->pg_bg_rgba_set = TRUE; } else { display->pg_bg_rgba_set = FALSE; } } static PangoAttribute * gtk_text_attr_appearance_copy (const PangoAttribute *attr) { const GtkTextAttrAppearance *appearance_attr = (const GtkTextAttrAppearance *)attr; return gtk_text_attr_appearance_new (&appearance_attr->appearance); } static void gtk_text_attr_appearance_destroy (PangoAttribute *attr) { GtkTextAttrAppearance *appearance_attr = (GtkTextAttrAppearance *)attr; if (appearance_attr->appearance.fg_rgba) gdk_rgba_free (appearance_attr->appearance.fg_rgba); if (appearance_attr->appearance.bg_rgba) gdk_rgba_free (appearance_attr->appearance.bg_rgba); if (appearance_attr->appearance.underline_rgba) gdk_rgba_free (appearance_attr->appearance.underline_rgba); if (appearance_attr->appearance.overline_rgba) gdk_rgba_free (appearance_attr->appearance.overline_rgba); if (appearance_attr->appearance.strikethrough_rgba) gdk_rgba_free (appearance_attr->appearance.strikethrough_rgba); g_slice_free (GtkTextAttrAppearance, appearance_attr); } static gboolean rgba_equal (const GdkRGBA *rgba1, const GdkRGBA *rgba2) { if (rgba1 && rgba2) return gdk_rgba_equal (rgba1, rgba2); if (rgba1 || rgba2) return FALSE; return TRUE; } static gboolean underline_equal (const GtkTextAppearance *appearance1, const GtkTextAppearance *appearance2) { return (appearance1->underline == appearance2->underline) && rgba_equal ((const GdkRGBA *)appearance1->underline_rgba, (const GdkRGBA *)appearance2->underline_rgba); } static gboolean overline_equal (const GtkTextAppearance *appearance1, const GtkTextAppearance *appearance2) { return (appearance1->overline == appearance2->overline) && rgba_equal ((const GdkRGBA *)appearance1->overline_rgba, (const GdkRGBA *)appearance2->overline_rgba); } static gboolean strikethrough_equal (const GtkTextAppearance *appearance1, const GtkTextAppearance *appearance2) { return (appearance1->strikethrough == appearance2->strikethrough) && rgba_equal ((const GdkRGBA *)appearance1->strikethrough_rgba, (const GdkRGBA *)appearance2->strikethrough_rgba); } static gboolean gtk_text_attr_appearance_compare (const PangoAttribute *attr1, const PangoAttribute *attr2) { const GtkTextAppearance *appearance1 = &((const GtkTextAttrAppearance *)attr1)->appearance; const GtkTextAppearance *appearance2 = &((const GtkTextAttrAppearance *)attr2)->appearance; return rgba_equal (appearance1->fg_rgba, appearance2->fg_rgba) && rgba_equal (appearance1->bg_rgba, appearance2->bg_rgba) && appearance1->draw_bg == appearance2->draw_bg && strikethrough_equal (appearance1, appearance2) && underline_equal (appearance1, appearance2) && overline_equal (appearance1, appearance2); } /* * gtk_text_attr_appearance_new: * @desc: * * Create a new font description attribute. (This attribute * allows setting family, style, weight, variant, stretch, * and size simultaneously.) * * Returns: */ static PangoAttribute * gtk_text_attr_appearance_new (const GtkTextAppearance *appearance) { static PangoAttrClass klass = { 0, gtk_text_attr_appearance_copy, gtk_text_attr_appearance_destroy, gtk_text_attr_appearance_compare }; GtkTextAttrAppearance *result; if (!klass.type) klass.type = gtk_text_attr_appearance_type = pango_attr_type_register (I_("GtkTextAttrAppearance")); result = g_slice_new (GtkTextAttrAppearance); result->attr.klass = &klass; result->appearance = *appearance; if (appearance->fg_rgba) result->appearance.fg_rgba = gdk_rgba_copy (appearance->fg_rgba); if (appearance->bg_rgba) result->appearance.bg_rgba = gdk_rgba_copy (appearance->bg_rgba); if (appearance->underline_rgba) result->appearance.underline_rgba = gdk_rgba_copy (appearance->underline_rgba); if (appearance->overline_rgba) result->appearance.overline_rgba = gdk_rgba_copy (appearance->overline_rgba); if (appearance->strikethrough_rgba) result->appearance.strikethrough_rgba = gdk_rgba_copy (appearance->strikethrough_rgba); return (PangoAttribute *)result; } static void add_generic_attrs (GtkTextLayout *layout, GtkTextAppearance *appearance, int byte_count, PangoAttrList *attrs, int start, gboolean size_only, gboolean is_text) { PangoAttribute *attr; if (appearance->underline != PANGO_UNDERLINE_NONE) { attr = pango_attr_underline_new (appearance->underline); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); } if (appearance->underline_rgba) { attr = pango_attr_underline_color_new (appearance->underline_rgba->red * 65535, appearance->underline_rgba->green * 65535, appearance->underline_rgba->blue * 65535); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); } if (appearance->overline != PANGO_OVERLINE_NONE) { attr = pango_attr_overline_new (appearance->overline); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); } if (appearance->overline_rgba) { attr = pango_attr_overline_color_new (appearance->overline_rgba->red * 65535, appearance->overline_rgba->green * 65535, appearance->overline_rgba->blue * 65535); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); } if (appearance->strikethrough) { attr = pango_attr_strikethrough_new (appearance->strikethrough); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); } if (appearance->strikethrough_rgba) { attr = pango_attr_strikethrough_color_new (appearance->strikethrough_rgba->red * 65535, appearance->strikethrough_rgba->green * 65535, appearance->strikethrough_rgba->blue * 65535); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); } if (appearance->rise != 0) { attr = pango_attr_rise_new (appearance->rise); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); } if (!size_only) { attr = gtk_text_attr_appearance_new (appearance); attr->start_index = start; attr->end_index = start + byte_count; ((GtkTextAttrAppearance *)attr)->appearance.is_text = is_text; pango_attr_list_insert (attrs, attr); } } static void add_text_attrs (GtkTextLayout *layout, GtkTextAttributes *style, int byte_count, PangoAttrList *attrs, int start, gboolean size_only, PangoAttribute **last_font_attr, PangoAttribute **last_scale_attr, PangoAttribute **last_fallback_attr) { PangoAttribute *attr; if (*last_font_attr && pango_font_description_equal (style->font, ((PangoAttrFontDesc*)*last_font_attr)->desc) && (*last_font_attr)->end_index >= start) { (*last_font_attr)->start_index = MIN ((*last_font_attr)->start_index, start); (*last_font_attr)->end_index = MAX ((*last_font_attr)->end_index, start + byte_count); } else { attr = pango_attr_font_desc_new (style->font); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); *last_font_attr = attr; } if (*last_scale_attr && style->font_scale == ((PangoAttrFloat*)*last_scale_attr)->value && (*last_scale_attr)->end_index >= start) { (*last_scale_attr)->start_index = MIN ((*last_scale_attr)->start_index, start); (*last_scale_attr)->end_index = MAX ((*last_scale_attr)->end_index, start + byte_count); } else if (style->font_scale != 1.0) { attr = pango_attr_scale_new (style->font_scale); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); *last_scale_attr = attr; } if (*last_fallback_attr && (!style->no_fallback) == ((PangoAttrInt*)*last_fallback_attr)->value && (*last_fallback_attr)->end_index >= start) { (*last_fallback_attr)->start_index = MIN ((*last_fallback_attr)->start_index, start); (*last_fallback_attr)->end_index = MAX ((*last_fallback_attr)->end_index, start + byte_count); } else if (style->no_fallback) { attr = pango_attr_fallback_new (!style->no_fallback); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); *last_fallback_attr = attr; } if (style->letter_spacing != 0) { attr = pango_attr_letter_spacing_new (style->letter_spacing); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); } if (style->line_height != 0.0) { if (style->line_height_is_absolute) attr = pango_attr_line_height_new_absolute (style->line_height * PANGO_SCALE); else attr = pango_attr_line_height_new (style->line_height); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); } if (style->font_features) { attr = pango_attr_font_features_new (style->font_features); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); } if (style->no_breaks) { attr = pango_attr_allow_breaks_new (FALSE); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); } if (style->show_spaces != PANGO_SHOW_NONE) { attr = pango_attr_show_new (style->show_spaces); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); } if (style->no_hyphens) { attr = pango_attr_insert_hyphens_new (FALSE); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); } if (style->text_transform != PANGO_TEXT_TRANSFORM_NONE) { attr = pango_attr_text_transform_new (style->text_transform); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); } if (style->word) { attr = pango_attr_word_new (); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); } if (style->sentence) { attr = pango_attr_sentence_new (); attr->start_index = start; attr->end_index = start + byte_count; pango_attr_list_insert (attrs, attr); } } static void add_paintable_attrs (GtkTextLayout *layout, GtkTextLineDisplay *display, GtkTextAttributes *style, GtkTextLineSegment *seg, PangoAttrList *attrs, int start) { PangoAttribute *attr; PangoRectangle logical_rect; GtkTextPaintable *paintable = &seg->body.paintable; int width, height; width = gdk_paintable_get_intrinsic_width (paintable->paintable); height = gdk_paintable_get_intrinsic_height (paintable->paintable); /* Pick *some* default size */ if (width == 0) width = 32; if (height == 0) { double aspect = gdk_paintable_get_intrinsic_aspect_ratio (paintable->paintable); if (aspect == 0) aspect = 1.0; height = width / aspect; } logical_rect.x = 0; logical_rect.y = -height * PANGO_SCALE; logical_rect.width = width * PANGO_SCALE; logical_rect.height = height * PANGO_SCALE; attr = pango_attr_shape_new_with_data (&logical_rect, &logical_rect, paintable->paintable, NULL, NULL); attr->start_index = start; attr->end_index = start + seg->byte_count; pango_attr_list_insert (attrs, attr); } static void add_child_attrs (GtkTextLayout *layout, GtkTextLineDisplay *display, GtkTextAttributes *style, GtkTextLineSegment *seg, PangoAttrList *attrs, int start) { PangoAttribute *attr; PangoRectangle logical_rect; int width, height; GSList *tmp_list; GtkWidget *widget = NULL; width = 1; height = 1; tmp_list = seg->body.child.widgets; while (tmp_list != NULL) { GtkWidget *child = tmp_list->data; if (_gtk_anchored_child_get_layout (child) == layout) { /* Found it */ GtkRequisition req; gtk_widget_get_preferred_size (child, &req, NULL); width = req.width; height = req.height; widget = child; break; } tmp_list = tmp_list->next; } if (tmp_list == NULL) { /* If tmp_list == NULL then there is no widget at this anchor in * this display; not an error. We make up an arbitrary size * to use, just so the programmer can see the blank spot. * We also put a NULL in the shaped objects list, to keep * the correspondence between the list and the shaped chars in * the layout. A bad hack, yes. */ width = 30; height = 20; widget = NULL; } logical_rect.x = 0; logical_rect.y = -height * PANGO_SCALE; logical_rect.width = width * PANGO_SCALE; logical_rect.height = height * PANGO_SCALE; attr = pango_attr_shape_new_with_data (&logical_rect, &logical_rect, widget, NULL, NULL); attr->start_index = start; attr->end_index = start + seg->byte_count; pango_attr_list_insert (attrs, attr); } /* * get_block_cursor: * @layout: a `GtkTextLayout` * @display: a `GtkTextLineDisplay` * @insert_iter: iter pointing to the cursor location * @insert_index: cursor offset in the @display’s layout, it may * be different from @insert_iter’s offset in case when preedit * string is present. * @pos: location to store cursor position * @cursor_at_line_end: whether cursor is at the end of line * * Checks whether layout should display block cursor at given position. * For this layout must be in overwrite mode and text at @insert_iter * must be editable. */ static gboolean get_block_cursor (GtkTextLayout *layout, GtkTextLineDisplay *display, const GtkTextIter *insert_iter, int insert_index, GdkRectangle *pos, gboolean *cursor_at_line_end) { PangoRectangle pango_pos; if (layout->overwrite_mode && gtk_text_iter_editable (insert_iter, TRUE) && _gtk_text_util_get_block_cursor_location (display->layout, insert_index, &pango_pos, cursor_at_line_end)) { if (pos) { pos->x = PANGO_PIXELS (pango_pos.x); pos->y = PANGO_PIXELS (pango_pos.y); pos->width = PANGO_PIXELS (pango_pos.width); pos->height = PANGO_PIXELS (pango_pos.height); } return TRUE; } else return FALSE; } static void add_cursor (GtkTextLayout *layout, GtkTextLineDisplay *display, GtkTextLineSegment *seg, int start) { CursorPosition cursor; GtkTextBTree *btree; btree = _gtk_text_buffer_get_btree (layout->buffer); cursor.pos = start; cursor.is_insert = _gtk_text_btree_mark_is_insert (btree, seg->body.mark.obj); cursor.is_selection_bound = _gtk_text_btree_mark_is_selection_bound (btree, seg->body.mark.obj); /* Hide insertion cursor when we have a selection or the layout * user has hidden the cursor. */ if (cursor.is_insert && (!layout->cursor_visible || gtk_text_buffer_get_selection_bounds (layout->buffer, NULL, NULL))) return; if (layout->overwrite_mode && cursor.is_insert) { GtkTextIter iter; gboolean cursor_at_line_end; _gtk_text_btree_get_iter_at_mark (btree, &iter, seg->body.mark.obj); if (get_block_cursor (layout, display, &iter, start, &display->block_cursor, &cursor_at_line_end)) { display->has_block_cursor = TRUE; display->cursor_at_line_end = cursor_at_line_end; return; } } if (!display->cursors) display->cursors = g_array_new (FALSE, FALSE, sizeof(CursorPosition)); display->cursors = g_array_append_val (display->cursors, cursor); } static gboolean is_shape (PangoLayoutRun *run) { GSList *tmp_list = run->item->analysis.extra_attrs; while (tmp_list) { PangoAttribute *attr = tmp_list->data; if (attr->klass->type == PANGO_ATTR_SHAPE) return TRUE; tmp_list = tmp_list->next; } return FALSE; } static void allocate_child_widgets (GtkTextLayout *text_layout, GtkTextLineDisplay *display) { PangoLayout *layout = display->layout; PangoLayoutIter *run_iter; run_iter = pango_layout_get_iter (layout); do { PangoLayoutRun *run = pango_layout_iter_get_run_readonly (run_iter); if (run && is_shape (run)) { int byte_index; GtkTextIter text_iter; GtkTextChildAnchor *anchor = NULL; GtkWidget **widgets = NULL; guint n_widgets = 0; guint i; /* The pango iterator iterates in visual order. * We use the byte index to find the child widget. */ byte_index = pango_layout_iter_get_index (run_iter); line_display_index_to_iter (text_layout, display, &text_iter, byte_index, 0); anchor = gtk_text_iter_get_child_anchor (&text_iter); if (anchor) widgets = gtk_text_child_anchor_get_widgets (anchor, &n_widgets); for (i = 0; i < n_widgets; i++) { GtkWidget *child = widgets[i]; PangoRectangle extents; if (_gtk_anchored_child_get_layout (child) == text_layout) { /* We emit "allocate_child" with the x,y of * the widget with respect to the top of the line * and the left side of the buffer */ pango_layout_iter_get_run_extents (run_iter, NULL, &extents); g_signal_emit (text_layout, signals[ALLOCATE_CHILD], 0, child, PANGO_PIXELS (extents.x) + display->x_offset, PANGO_PIXELS (extents.y) + display->top_margin); } } g_free (widgets); } } while (pango_layout_iter_next_run (run_iter)); pango_layout_iter_free (run_iter); } void gtk_text_layout_update_children (GtkTextLayout *text_layout, GtkTextLineDisplay *display) { allocate_child_widgets (text_layout, display); } static void convert_color (GdkRGBA *result, PangoAttrColor *attr) { result->red = attr->color.red / 65535.; result->blue = attr->color.blue / 65535.; result->green = attr->color.green / 65535.; result->alpha = 1; } /* This function is used to convert the preedit string attributes, which are * standard PangoAttributes, into the custom attributes used by the text * widget and insert them into an attr list with a given offset. */ static void add_preedit_attrs (GtkTextLayout *layout, GtkTextAttributes *style, PangoAttrList *attrs, int offset, gboolean size_only) { PangoAttrIterator *iter = pango_attr_list_get_iterator (layout->preedit_attrs); do { GtkTextAppearance appearance = style->appearance; PangoFontDescription *font_desc = pango_font_description_copy_static (style->font); PangoAttribute *insert_attr; GSList *extra_attrs = NULL; GSList *tmp_list; PangoLanguage *language; int start, end; pango_attr_iterator_range (iter, &start, &end); if (end == G_MAXINT) end = layout->preedit_len; if (end == start) continue; pango_attr_iterator_get_font (iter, font_desc, &language, &extra_attrs); if (appearance.fg_rgba) appearance.fg_rgba = gdk_rgba_copy (appearance.fg_rgba); if (appearance.bg_rgba) appearance.bg_rgba = gdk_rgba_copy (appearance.bg_rgba); if (appearance.underline_rgba) appearance.underline_rgba = gdk_rgba_copy (appearance.underline_rgba); if (appearance.overline_rgba) appearance.overline_rgba = gdk_rgba_copy (appearance.overline_rgba); if (appearance.strikethrough_rgba) appearance.strikethrough_rgba = gdk_rgba_copy (appearance.strikethrough_rgba); tmp_list = extra_attrs; while (tmp_list) { PangoAttribute *attr = tmp_list->data; GdkRGBA rgba; switch ((guint) attr->klass->type) { case PANGO_ATTR_FOREGROUND: convert_color (&rgba, (PangoAttrColor *)attr); if (appearance.fg_rgba) gdk_rgba_free (appearance.fg_rgba); appearance.fg_rgba = gdk_rgba_copy (&rgba); break; case PANGO_ATTR_BACKGROUND: convert_color (&rgba, (PangoAttrColor *)attr); if (appearance.bg_rgba) gdk_rgba_free (appearance.bg_rgba); appearance.bg_rgba = gdk_rgba_copy (&rgba); appearance.draw_bg = TRUE; break; case PANGO_ATTR_UNDERLINE: appearance.underline = ((PangoAttrInt *)attr)->value; break; case PANGO_ATTR_UNDERLINE_COLOR: convert_color (&rgba, (PangoAttrColor*)attr); if (appearance.underline_rgba) gdk_rgba_free (appearance.underline_rgba); appearance.underline_rgba = gdk_rgba_copy (&rgba); break; case PANGO_ATTR_OVERLINE: appearance.overline = ((PangoAttrInt *)attr)->value; break; case PANGO_ATTR_OVERLINE_COLOR: convert_color (&rgba, (PangoAttrColor*)attr); if (appearance.overline_rgba) gdk_rgba_free (appearance.overline_rgba); appearance.overline_rgba = gdk_rgba_copy (&rgba); break; case PANGO_ATTR_STRIKETHROUGH: appearance.strikethrough = ((PangoAttrInt *)attr)->value; break; case PANGO_ATTR_STRIKETHROUGH_COLOR: convert_color (&rgba, (PangoAttrColor*)attr); if (appearance.strikethrough_rgba) gdk_rgba_free (appearance.strikethrough_rgba); appearance.strikethrough_rgba = gdk_rgba_copy (&rgba); break; case PANGO_ATTR_RISE: appearance.rise = ((PangoAttrInt *)attr)->value; break; default: break; } pango_attribute_destroy (attr); tmp_list = tmp_list->next; } g_slist_free (extra_attrs); insert_attr = pango_attr_font_desc_new (font_desc); insert_attr->start_index = start + offset; insert_attr->end_index = end + offset; pango_attr_list_insert (attrs, insert_attr); if (language) { insert_attr = pango_attr_language_new (language); insert_attr->start_index = start + offset; insert_attr->end_index = end + offset; pango_attr_list_insert (attrs, insert_attr); } add_generic_attrs (layout, &appearance, end - start, attrs, start + offset, size_only, TRUE); if (appearance.fg_rgba) gdk_rgba_free (appearance.fg_rgba); if (appearance.bg_rgba) gdk_rgba_free (appearance.bg_rgba); if (appearance.underline_rgba) gdk_rgba_free (appearance.underline_rgba); if (appearance.overline_rgba) gdk_rgba_free (appearance.overline_rgba); if (appearance.strikethrough_rgba) gdk_rgba_free (appearance.strikethrough_rgba); pango_font_description_free (font_desc); } while (pango_attr_iterator_next (iter)); pango_attr_iterator_destroy (iter); } /* Iterate over the line and fill in display->cursors. * It’s a stripped copy of gtk_text_layout_get_line_display() */ void gtk_text_layout_update_display_cursors (GtkTextLayout *layout, GtkTextLine *line, GtkTextLineDisplay *display) { GtkTextLineSegment *seg; GtkTextIter iter; int layout_byte_offset, buffer_byte_offset; GSList *cursor_byte_offsets = NULL; GSList *cursor_segs = NULL; GSList *tmp_list1, *tmp_list2; if (!display->cursors_invalid) return; display->cursors_invalid = FALSE; /* Special-case optimization for completely * invisible lines; makes it faster to deal * with sequences of invisible lines. */ if (totally_invisible_line (layout, line, &iter)) return; /* Iterate over segments */ layout_byte_offset = 0; /* position in the layout text (includes preedit, does not include invisible text) */ buffer_byte_offset = 0; /* position in the buffer line */ seg = _gtk_text_iter_get_any_segment (&iter); while (seg != NULL) { /* Displayable segments */ if (seg->type == >k_text_char_type || seg->type == >k_text_paintable_type || seg->type == >k_text_child_type) { gtk_text_layout_get_iter_at_line (layout, &iter, line, buffer_byte_offset); if (!_gtk_text_btree_char_is_invisible (&iter)) layout_byte_offset += seg->byte_count; buffer_byte_offset += seg->byte_count; } /* Marks */ else if (seg->type == >k_text_right_mark_type || seg->type == >k_text_left_mark_type) { int cursor_offset = 0; /* At the insertion point, add the preedit string, if any */ if (_gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer), seg->body.mark.obj)) { display->insert_index = layout_byte_offset; if (layout->preedit_len > 0) { layout_byte_offset += layout->preedit_len; /* DO NOT increment the buffer byte offset for preedit */ cursor_offset = layout->preedit_cursor - layout->preedit_len; } } /* Display visible marks */ if (seg->body.mark.visible) { cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets, GINT_TO_POINTER (layout_byte_offset + cursor_offset)); cursor_segs = g_slist_prepend (cursor_segs, seg); } } /* Toggles */ else if (seg->type == >k_text_toggle_on_type || seg->type == >k_text_toggle_off_type) { } else g_error ("Unknown segment type: %s", seg->type->name); seg = seg->next; } tmp_list1 = cursor_byte_offsets; tmp_list2 = cursor_segs; while (tmp_list1) { add_cursor (layout, display, tmp_list2->data, GPOINTER_TO_INT (tmp_list1->data)); tmp_list1 = tmp_list1->next; tmp_list2 = tmp_list2->next; } g_slist_free (cursor_byte_offsets); g_slist_free (cursor_segs); } /* Add the tag to the array if it's not there already, and remove * it otherwise. It keeps the array sorted by tags priority. */ static GPtrArray * tags_array_toggle_tag (GPtrArray *array, GtkTextTag *tag) { int pos; GtkTextTag **tags; if (array == NULL) array = g_ptr_array_new (); tags = (GtkTextTag**) array->pdata; for (pos = 0; pos < array->len && tags[pos]->priv->priority < tag->priv->priority; pos++) ; if (pos < array->len && tags[pos] == tag) g_ptr_array_remove_index (array, pos); else { g_ptr_array_set_size (array, array->len + 1); if (pos < array->len - 1) memmove (array->pdata + pos + 1, array->pdata + pos, (array->len - pos - 1) * sizeof (GtkTextTag*)); array->pdata[pos] = tag; } return array; } GtkTextLineDisplay * gtk_text_layout_create_display (GtkTextLayout *layout, GtkTextLine *line, gboolean size_only) { GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout); GtkTextLineDisplay *display; GtkTextLineSegment *seg; GtkTextIter iter; GtkTextAttributes *style; char *text; int text_pixel_width; PangoAttrList *attrs; int text_allocated, layout_byte_offset; PangoRectangle extents; gboolean para_values_set = FALSE; GSList *cursor_byte_offsets = NULL; GSList *cursor_segs = NULL; GSList *tmp_list1, *tmp_list2; gboolean saw_widget = FALSE; PangoDirection base_dir; GPtrArray *tags; gboolean initial_toggle_segments; int h_margin; int h_padding; PangoAttribute *last_font_attr = NULL; PangoAttribute *last_scale_attr = NULL; PangoAttribute *last_fallback_attr = NULL; GtkTextBTree *btree; g_return_val_if_fail (line != NULL, NULL); display = g_rc_box_new0 (GtkTextLineDisplay); display->mru_link.data = display; display->size_only = !!size_only; display->line = line; display->insert_index = -1; /* Special-case optimization for completely * invisible lines; makes it faster to deal * with sequences of invisible lines. */ if (totally_invisible_line (layout, line, &iter)) { display->layout = pango_layout_new (layout->ltr_context); return g_steal_pointer (&display); } /* Find the bidi base direction */ base_dir = line->dir_propagated_forward; if (base_dir == PANGO_DIRECTION_NEUTRAL) base_dir = line->dir_propagated_back; if (line == priv->cursor_line && line->dir_strong == PANGO_DIRECTION_NEUTRAL) { base_dir = (layout->keyboard_direction == GTK_TEXT_DIR_LTR) ? PANGO_DIRECTION_LTR : PANGO_DIRECTION_RTL; } btree = _gtk_text_buffer_get_btree (layout->buffer); /* Allocate space for flat text for buffer */ text_allocated = _gtk_text_line_byte_count (line); text = g_malloc (text_allocated); attrs = pango_attr_list_new (); /* Iterate over segments, creating display chunks for them, and updating the tags array. */ layout_byte_offset = 0; /* current length of layout text (includes preedit, does not include invisible text) */ seg = _gtk_text_iter_get_any_segment (&iter); tags = _gtk_text_btree_get_tags (&iter); initial_toggle_segments = TRUE; while (seg != NULL) { /* Displayable segments */ if (seg->type == >k_text_char_type || seg->type == >k_text_paintable_type || seg->type == >k_text_child_type) { style = get_style (layout, tags); initial_toggle_segments = FALSE; /* We have to delay setting the paragraph values until we * hit the first paintable or text segment because toggles at * the beginning of the paragraph should affect the * paragraph-global values */ if (!para_values_set) { set_para_values (layout, base_dir, style, display); para_values_set = TRUE; } /* First see if the chunk is invisible, and ignore it if so. Tk * looked at tabs, wrap mode, etc. before doing this, but * that made no sense to me, so I am just skipping the * invisible chunks */ if (!style->invisible) { if (seg->type == >k_text_char_type) { /* We don't want to split segments because of marks, * so we scan forward for more segments only * separated from us by marks. In theory, we should * also merge segments with identical styles, even * if there are toggles in-between */ int bytes = 0; GtkTextLineSegment *prev_seg = NULL; while (seg) { if (seg->type == >k_text_char_type) { memcpy (text + layout_byte_offset, seg->body.chars, seg->byte_count); layout_byte_offset += seg->byte_count; bytes += seg->byte_count; } else if (seg->type == >k_text_right_mark_type || seg->type == >k_text_left_mark_type) { /* If we have preedit string, break out of this loop - we'll almost * certainly have different attributes on the preedit string */ if (layout->preedit_len > 0 && _gtk_text_btree_mark_is_insert (btree, seg->body.mark.obj)) break; if (seg->body.mark.visible) { cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets, GINT_TO_POINTER (layout_byte_offset)); cursor_segs = g_slist_prepend (cursor_segs, seg); if (_gtk_text_btree_mark_is_insert (btree, seg->body.mark.obj)) display->insert_index = layout_byte_offset; } } else break; prev_seg = seg; seg = seg->next; } seg = prev_seg; /* Back up one */ add_generic_attrs (layout, &style->appearance, bytes, attrs, layout_byte_offset - bytes, size_only, TRUE); add_text_attrs (layout, style, bytes, attrs, layout_byte_offset - bytes, size_only, &last_font_attr, &last_scale_attr, &last_fallback_attr); } else if (seg->type == >k_text_paintable_type) { add_generic_attrs (layout, &style->appearance, seg->byte_count, attrs, layout_byte_offset, size_only, FALSE); add_paintable_attrs (layout, display, style, seg, attrs, layout_byte_offset); memcpy (text + layout_byte_offset, _gtk_text_unknown_char_utf8, seg->byte_count); layout_byte_offset += seg->byte_count; } else if (seg->type == >k_text_child_type) { saw_widget = TRUE; add_generic_attrs (layout, &style->appearance, seg->byte_count, attrs, layout_byte_offset, size_only, FALSE); add_child_attrs (layout, display, style, seg, attrs, layout_byte_offset); memcpy (text + layout_byte_offset, gtk_text_child_anchor_get_replacement (seg->body.child.obj), seg->byte_count); layout_byte_offset += seg->byte_count; } else { /* We don't know this segment type */ g_assert_not_reached (); } } /* if (segment was visible) */ release_style (layout, style); } /* Toggles */ else if (seg->type == >k_text_toggle_on_type || seg->type == >k_text_toggle_off_type) { /* Style may have changed, drop our current cached style */ invalidate_cached_style (layout); /* Add the tag only after we have seen some non-toggle non-mark segment, * otherwise the tag is already accounted for by _gtk_text_btree_get_tags(). */ if (!initial_toggle_segments) tags = tags_array_toggle_tag (tags, seg->body.toggle.info->tag); } /* Marks */ else if (seg->type == >k_text_right_mark_type || seg->type == >k_text_left_mark_type) { int cursor_offset = 0; /* At the insertion point, add the preedit string, if any */ if (_gtk_text_btree_mark_is_insert (btree, seg->body.mark.obj)) { display->insert_index = layout_byte_offset; if (layout->preedit_len > 0) { text_allocated += layout->preedit_len; text = g_realloc (text, text_allocated); style = get_style (layout, tags); add_preedit_attrs (layout, style, attrs, layout_byte_offset, size_only); release_style (layout, style); memcpy (text + layout_byte_offset, layout->preedit_string, layout->preedit_len); layout_byte_offset += layout->preedit_len; /* DO NOT increment the buffer byte offset for preedit */ cursor_offset = layout->preedit_cursor - layout->preedit_len; } } /* Display visible marks */ if (seg->body.mark.visible) { cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets, GINT_TO_POINTER (layout_byte_offset + cursor_offset)); cursor_segs = g_slist_prepend (cursor_segs, seg); } } else g_error ("Unknown segment type: %s", seg->type->name); seg = seg->next; } if (!para_values_set) { style = get_style (layout, tags); set_para_values (layout, base_dir, style, display); release_style (layout, style); } /* Pango doesn't want the trailing paragraph delimiters */ { /* Only one character has type G_UNICODE_PARAGRAPH_SEPARATOR in * Unicode 3.0; update this if that changes. */ #define PARAGRAPH_SEPARATOR 0x2029 gunichar ch = 0; if (layout_byte_offset > 0) { const char *prev = g_utf8_prev_char (text + layout_byte_offset); ch = g_utf8_get_char (prev); if (ch == PARAGRAPH_SEPARATOR || ch == '\r' || ch == '\n') layout_byte_offset = prev - text; /* chop off */ if (ch == '\n' && layout_byte_offset > 0) { /* Possibly chop a CR as well */ prev = g_utf8_prev_char (text + layout_byte_offset); if (*prev == '\r') --layout_byte_offset; } } } pango_layout_set_text (display->layout, text, layout_byte_offset); pango_layout_set_attributes (display->layout, attrs); tmp_list1 = cursor_byte_offsets; tmp_list2 = cursor_segs; while (tmp_list1) { add_cursor (layout, display, tmp_list2->data, GPOINTER_TO_INT (tmp_list1->data)); tmp_list1 = tmp_list1->next; tmp_list2 = tmp_list2->next; } g_slist_free (cursor_byte_offsets); g_slist_free (cursor_segs); pango_layout_get_extents (display->layout, NULL, &extents); text_pixel_width = PIXEL_BOUND (extents.width); h_margin = display->left_margin + display->right_margin; h_padding = layout->left_padding + layout->right_padding; display->width = text_pixel_width + h_margin + h_padding; display->height += PANGO_PIXELS (extents.height); /* If we aren't wrapping, we need to do the alignment of each * paragraph ourselves. */ if (pango_layout_get_width (display->layout) < 0) { int excess = display->total_width - text_pixel_width; switch (pango_layout_get_alignment (display->layout)) { case PANGO_ALIGN_LEFT: default: break; case PANGO_ALIGN_CENTER: display->x_offset += excess / 2; break; case PANGO_ALIGN_RIGHT: display->x_offset += excess; break; } } /* Free this if we aren't in a loop */ if (layout->wrap_loop_count == 0) invalidate_cached_style (layout); g_free (text); pango_attr_list_unref (attrs); if (tags != NULL) g_ptr_array_free (tags, TRUE); display->has_children = saw_widget; if (saw_widget) allocate_child_widgets (layout, display); return g_steal_pointer (&display); } GtkTextLineDisplay * gtk_text_layout_get_line_display (GtkTextLayout *layout, GtkTextLine *line, gboolean size_only) { GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout); return gtk_text_line_display_cache_get (priv->cache, layout, line, size_only); } static void gtk_text_line_display_finalize (GtkTextLineDisplay *display) { g_assert (display != NULL); g_assert (display->cache_iter == NULL); g_assert (display->mru_link.prev == NULL); g_assert (display->mru_link.next == NULL); g_assert (display->mru_link.data == display); g_clear_object (&display->layout); g_clear_pointer (&display->cursors, g_array_unref); g_clear_pointer (&display->node, gsk_render_node_unref); } GtkTextLineDisplay * gtk_text_line_display_ref (GtkTextLineDisplay *display) { return g_rc_box_acquire (display); } void gtk_text_line_display_unref (GtkTextLineDisplay *display) { g_rc_box_release_full (display, (GDestroyNotify)gtk_text_line_display_finalize); } /* Functions to convert iter <=> index for the line of a GtkTextLineDisplay * taking into account the preedit string and invisible text if necessary. */ static int line_display_iter_to_index (GtkTextLayout *layout, GtkTextLineDisplay *display, const GtkTextIter *iter) { int index; g_return_val_if_fail (_gtk_text_iter_get_text_line (iter) == display->line, 0); index = gtk_text_iter_get_visible_line_index (iter); if (layout->preedit_len > 0 && display->insert_index >= 0) { if (index >= display->insert_index) index += layout->preedit_len; } return index; } static void line_display_index_to_iter (GtkTextLayout *layout, GtkTextLineDisplay *display, GtkTextIter *iter, int index, int trailing) { g_return_if_fail (!_gtk_text_line_is_last (display->line, _gtk_text_buffer_get_btree (layout->buffer))); if (layout->preedit_len > 0 && display->insert_index >= 0) { if (index >= display->insert_index + layout->preedit_len) index -= layout->preedit_len; else if (index > display->insert_index) { index = display->insert_index; trailing = 0; } } gtk_text_layout_get_iter_at_line (layout, iter, display->line, 0); gtk_text_iter_set_visible_line_index (iter, index); if (_gtk_text_iter_get_text_line (iter) != display->line) { /* Clamp to end of line - really this clamping should have been done * before here, maybe in Pango, this is a broken band-aid I think */ gtk_text_layout_get_iter_at_line (layout, iter, display->line, 0); if (!gtk_text_iter_ends_line (iter)) gtk_text_iter_forward_to_line_end (iter); } gtk_text_iter_forward_chars (iter, trailing); } static void get_line_at_y (GtkTextLayout *layout, int y, GtkTextLine **line, int *line_top) { GtkTextBTree *btree = _gtk_text_buffer_get_btree (layout->buffer); if (y < 0) y = 0; if (y > layout->height) y = layout->height; *line = _gtk_text_btree_find_line_by_y (btree, layout, y, line_top); if (*line == NULL) { *line = _gtk_text_btree_get_end_iter_line (btree); if (line_top) *line_top = _gtk_text_btree_find_line_top (btree, *line, layout); } } /** * gtk_text_layout_get_line_at_y: * @layout: a `GtkLayout` * @target_iter: the iterator in which the result is stored * @y: the y position * @line_top: location to store the y coordinate of the * top of the line. (Can by %NULL) * * Get the iter at the beginning of the line which is displayed * at the given y. */ void gtk_text_layout_get_line_at_y (GtkTextLayout *layout, GtkTextIter *target_iter, int y, int *line_top) { GtkTextLine *line; g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); g_return_if_fail (target_iter != NULL); get_line_at_y (layout, y, &line, line_top); gtk_text_layout_get_iter_at_line (layout, target_iter, line, 0); } gboolean gtk_text_layout_get_iter_at_pixel (GtkTextLayout *layout, GtkTextIter *target_iter, int x, int y) { int trailing; gboolean inside; inside = gtk_text_layout_get_iter_at_position (layout, target_iter, &trailing, x, y); gtk_text_iter_forward_chars (target_iter, trailing); return inside; } gboolean gtk_text_layout_get_iter_at_position (GtkTextLayout *layout, GtkTextIter *target_iter, int *trailing, int x, int y) { GtkTextLine *line; int byte_index; int line_top; GtkTextLineDisplay *display; gboolean inside; g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE); g_return_val_if_fail (target_iter != NULL, FALSE); get_line_at_y (layout, y, &line, &line_top); display = gtk_text_layout_get_line_display (layout, line, FALSE); x -= display->x_offset; y -= line_top + display->top_margin; /* If we are below the layout, position the cursor at the last character * of the line. */ if (y > display->height - display->top_margin - display->bottom_margin) { byte_index = _gtk_text_line_byte_count (line); if (trailing) *trailing = 0; inside = FALSE; } else { /* Ignore the "outside" return value from pango. Pango is doing * the right thing even if we are outside the layout in the * x-direction. */ inside = pango_layout_xy_to_index (display->layout, x * PANGO_SCALE, y * PANGO_SCALE, &byte_index, trailing); } line_display_index_to_iter (layout, display, target_iter, byte_index, 0); gtk_text_line_display_unref (display); return inside; } /** * gtk_text_layout_get_cursor_locations: * @layout: a `GtkTextLayout` * @iter: a `GtkTextIter` * @strong_pos: (out) (optional): location to store the strong cursor position * @weak_pos: (out) (optional): location to store the weak cursor position * * Given an iterator within a text layout, determine the positions of the * strong and weak cursors if the insertion point is at that * iterator. The position of each cursor is stored as a zero-width * rectangle. The strong cursor location is the location where * characters of the directionality equal to the base direction of the * paragraph are inserted. The weak cursor location is the location * where characters of the directionality opposite to the base * direction of the paragraph are inserted. **/ void gtk_text_layout_get_cursor_locations (GtkTextLayout *layout, GtkTextIter *iter, GdkRectangle *strong_pos, GdkRectangle *weak_pos) { GtkTextLine *line; GtkTextLineDisplay *display; int line_top; int index; GtkTextIter insert_iter; PangoRectangle pango_strong_pos; PangoRectangle pango_weak_pos; g_return_if_fail (layout != NULL); g_return_if_fail (iter != NULL); line = _gtk_text_iter_get_text_line (iter); display = gtk_text_layout_get_line_display (layout, line, FALSE); index = line_display_iter_to_index (layout, display, iter); line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer), line, layout); gtk_text_buffer_get_iter_at_mark (layout->buffer, &insert_iter, gtk_text_buffer_get_insert (layout->buffer)); if (gtk_text_iter_equal (iter, &insert_iter)) index += layout->preedit_cursor - layout->preedit_len; pango_layout_get_cursor_pos (display->layout, index, strong_pos ? &pango_strong_pos : NULL, weak_pos ? &pango_weak_pos : NULL); if (strong_pos) { strong_pos->x = display->x_offset + pango_strong_pos.x / PANGO_SCALE; strong_pos->y = line_top + display->top_margin + pango_strong_pos.y / PANGO_SCALE; strong_pos->width = 0; strong_pos->height = pango_strong_pos.height / PANGO_SCALE; } if (weak_pos) { weak_pos->x = display->x_offset + pango_weak_pos.x / PANGO_SCALE; weak_pos->y = line_top + display->top_margin + pango_weak_pos.y / PANGO_SCALE; weak_pos->width = 0; weak_pos->height = pango_weak_pos.height / PANGO_SCALE; } gtk_text_line_display_unref (display); } /** * _gtk_text_layout_get_block_cursor: * @layout: a `GtkTextLayout` * @pos: a `GdkRectangle` to store block cursor position * * If layout is to display a block cursor, calculates its position * and returns %TRUE. Otherwise it returns %FALSE. In case when * cursor is visible, it simply returns the position stored in * the line display, otherwise it has to compute the position * (see get_block_cursor()). **/ gboolean _gtk_text_layout_get_block_cursor (GtkTextLayout *layout, GdkRectangle *pos) { GtkTextLine *line; GtkTextLineDisplay *display; GtkTextIter iter; GdkRectangle rect; gboolean block = FALSE; g_return_val_if_fail (layout != NULL, FALSE); gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter, gtk_text_buffer_get_insert (layout->buffer)); line = _gtk_text_iter_get_text_line (&iter); display = gtk_text_layout_get_line_display (layout, line, FALSE); if (display->has_block_cursor) { block = TRUE; rect = display->block_cursor; } else { int index = display->insert_index; if (index < 0) index = gtk_text_iter_get_line_index (&iter); if (get_block_cursor (layout, display, &iter, index, &rect, NULL)) block = TRUE; } if (block && pos) { int line_top; line_top = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer), line, layout); *pos = rect; pos->x += display->x_offset; pos->y += line_top + display->top_margin; } gtk_text_line_display_unref (display); return block; } /** * gtk_text_layout_get_line_yrange: * @layout: a `GtkTextLayout` * @iter: a `GtkTextIter` * @y: (nullable): location to store the top of the paragraph in pixels * @height: (nullable): location to store the height of the paragraph in pixels * * Find the range of y coordinates for the paragraph containing * the given iter. **/ void gtk_text_layout_get_line_yrange (GtkTextLayout *layout, const GtkTextIter *iter, int *y, int *height) { GtkTextLine *line; g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer)); line = _gtk_text_iter_get_text_line (iter); if (y) *y = _gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer), line, layout); if (height) { GtkTextLineData *line_data = _gtk_text_line_get_data (line, layout); if (line_data) *height = line_data->height; else *height = 0; } } void gtk_text_layout_get_iter_location (GtkTextLayout *layout, const GtkTextIter *iter, GdkRectangle *rect) { PangoRectangle pango_rect; GtkTextLine *line; GtkTextBTree *tree; GtkTextLineDisplay *display; int byte_index; int x_offset; g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); g_return_if_fail (_gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer)); g_return_if_fail (rect != NULL); tree = _gtk_text_iter_get_btree (iter); line = _gtk_text_iter_get_text_line (iter); display = gtk_text_layout_get_line_display (layout, line, FALSE); rect->y = _gtk_text_btree_find_line_top (tree, line, layout); x_offset = display->x_offset * PANGO_SCALE; byte_index = gtk_text_iter_get_line_index (iter); pango_layout_index_to_pos (display->layout, byte_index, &pango_rect); rect->x = PANGO_PIXELS (x_offset + pango_rect.x); rect->y += PANGO_PIXELS (pango_rect.y) + display->top_margin; rect->width = PANGO_PIXELS (pango_rect.width); rect->height = PANGO_PIXELS (pango_rect.height); gtk_text_line_display_unref (display); } /* FFIXX */ /* Find the iter for the logical beginning of the first display line whose * top y is >= y. If none exists, move the iter to the logical beginning * of the last line in the buffer. */ static void find_display_line_below (GtkTextLayout *layout, GtkTextIter *iter, int y) { GtkTextBTree *btree; GtkTextLine *line, *next; GtkTextLine *found_line = NULL; int line_top; int found_byte = 0; btree = _gtk_text_buffer_get_btree (layout->buffer); line = _gtk_text_btree_find_line_by_y (btree, layout, y, &line_top); if (!line) { line = _gtk_text_btree_get_end_iter_line (btree); line_top = _gtk_text_btree_find_line_top (btree, line, layout); } while (line && !found_line) { GtkTextLineDisplay *display = gtk_text_layout_get_line_display (layout, line, FALSE); PangoLayoutIter *layout_iter; layout_iter = pango_layout_get_iter (display->layout); line_top += display->top_margin; do { int first_y, last_y; PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter); found_byte = layout_line->start_index; if (line_top >= y) { found_line = line; break; } pango_layout_iter_get_line_yrange (layout_iter, &first_y, &last_y); line_top += (last_y - first_y) / PANGO_SCALE; } while (pango_layout_iter_next_line (layout_iter)); pango_layout_iter_free (layout_iter); line_top += display->bottom_margin; gtk_text_line_display_unref (display); next = _gtk_text_line_next_excluding_last (line); if (!next) found_line = line; line = next; } gtk_text_layout_get_iter_at_line (layout, iter, found_line, found_byte); } /* Find the iter for the logical beginning of the last display line whose * top y is >= y. If none exists, move the iter to the logical beginning * of the first line in the buffer. */ static void find_display_line_above (GtkTextLayout *layout, GtkTextIter *iter, int y) { GtkTextBTree *btree; GtkTextLine *line; GtkTextLine *found_line = NULL; int line_top; int found_byte = 0; btree = _gtk_text_buffer_get_btree (layout->buffer); line = _gtk_text_btree_find_line_by_y (btree, layout, y, &line_top); if (!line) { line = _gtk_text_btree_get_end_iter_line (btree); line_top = _gtk_text_btree_find_line_top (btree, line, layout); } while (line && !found_line) { GtkTextLineDisplay *display = gtk_text_layout_get_line_display (layout, line, FALSE); PangoRectangle logical_rect; PangoLayoutIter *layout_iter; int tmp_top; layout_iter = pango_layout_get_iter (display->layout); line_top -= display->top_margin + display->bottom_margin; pango_layout_iter_get_layout_extents (layout_iter, NULL, &logical_rect); line_top -= logical_rect.height / PANGO_SCALE; tmp_top = line_top + display->top_margin; do { int first_y, last_y; PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter); found_byte = layout_line->start_index; pango_layout_iter_get_line_yrange (layout_iter, &first_y, &last_y); tmp_top -= (last_y - first_y) / PANGO_SCALE; if (tmp_top < y) { found_line = line; pango_layout_iter_free (layout_iter); goto done; } } while (pango_layout_iter_next_line (layout_iter)); pango_layout_iter_free (layout_iter); gtk_text_line_display_unref (display); line = _gtk_text_line_previous (line); } done: if (found_line) gtk_text_layout_get_iter_at_line (layout, iter, found_line, found_byte); else gtk_text_buffer_get_iter_at_offset (layout->buffer, iter, 0); } /** * gtk_text_layout_clamp_iter_to_vrange: * @layout: a `GtkTextLayout` * @iter: a `GtkTextIter` * @top: the top of the range * @bottom: the bottom the range * * If the iterator is not fully in the range @top <= y < @bottom, * then, if possible, move it the minimum distance so that the * iterator in this range. * * Returns: %TRUE if the iterator was moved, otherwise %FALSE. **/ gboolean gtk_text_layout_clamp_iter_to_vrange (GtkTextLayout *layout, GtkTextIter *iter, int top, int bottom) { GdkRectangle iter_rect; gtk_text_layout_get_iter_location (layout, iter, &iter_rect); /* If the iter is at least partially above the range, put the iter * at the first fully visible line after the range. */ if (iter_rect.y < top) { find_display_line_below (layout, iter, top); return TRUE; } /* Otherwise, if the iter is at least partially below the screen, put the * iter on the last logical position of the last completely visible * line on screen */ else if (iter_rect.y + iter_rect.height > bottom) { find_display_line_above (layout, iter, bottom); return TRUE; } else return FALSE; } /** * gtk_text_layout_move_iter_to_previous_line: * @layout: a `GtkLayout` * @iter: a `GtkTextIter` * * Move the iterator to the beginning of the previous line. The lines * of a wrapped paragraph are treated as distinct for this operation. **/ gboolean gtk_text_layout_move_iter_to_previous_line (GtkTextLayout *layout, GtkTextIter *iter) { GtkTextLine *line; GtkTextLineDisplay *display; int line_byte; GSList *tmp_list; PangoLayoutLine *layout_line; GtkTextIter orig; gboolean update_byte = FALSE; g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE); g_return_val_if_fail (iter != NULL, FALSE); orig = *iter; line = _gtk_text_iter_get_text_line (iter); display = gtk_text_layout_get_line_display (layout, line, FALSE); line_byte = line_display_iter_to_index (layout, display, iter); /* If display->height == 0 then the line is invisible, so don't * move onto it. */ while (display->height == 0) { GtkTextLine *prev_line; prev_line = _gtk_text_line_previous (line); if (prev_line == NULL) { line_display_index_to_iter (layout, display, iter, 0, 0); goto out; } gtk_text_line_display_unref (display); line = prev_line; display = gtk_text_layout_get_line_display (layout, prev_line, FALSE); update_byte = TRUE; } tmp_list = pango_layout_get_lines_readonly (display->layout); layout_line = tmp_list->data; if (update_byte) { line_byte = layout_line->start_index + layout_line->length; } if (line_byte < layout_line->length || !tmp_list->next) /* first line of paragraph */ { GtkTextLine *prev_line; prev_line = _gtk_text_line_previous (line); /* first line of the whole buffer, do not move the iter and return FALSE */ if (prev_line == NULL) goto out; while (prev_line) { gtk_text_line_display_unref (display); display = gtk_text_layout_get_line_display (layout, prev_line, FALSE); if (display->height > 0) { tmp_list = g_slist_last (pango_layout_get_lines_readonly (display->layout)); layout_line = tmp_list->data; line_display_index_to_iter (layout, display, iter, layout_line->start_index + layout_line->length, 0); break; } prev_line = _gtk_text_line_previous (prev_line); } } else { int prev_offset = layout_line->start_index; tmp_list = tmp_list->next; while (tmp_list) { layout_line = tmp_list->data; if (line_byte < layout_line->start_index + layout_line->length || !tmp_list->next) { line_display_index_to_iter (layout, display, iter, prev_offset, 0); break; } prev_offset = layout_line->start_index; tmp_list = tmp_list->next; } } out: gtk_text_line_display_unref (display); return !gtk_text_iter_equal (iter, &orig) && !gtk_text_iter_is_end (iter); } /** * gtk_text_layout_move_iter_to_next_line: * @layout: a `GtkLayout` * @iter: a `GtkTextIter` * * Move the iterator to the beginning of the next line. The * lines of a wrapped paragraph are treated as distinct for * this operation. **/ gboolean gtk_text_layout_move_iter_to_next_line (GtkTextLayout *layout, GtkTextIter *iter) { GtkTextLine *line; GtkTextLineDisplay *display; int line_byte; GtkTextIter orig; gboolean found = FALSE; gboolean found_after = FALSE; gboolean first = TRUE; g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE); g_return_val_if_fail (iter != NULL, FALSE); orig = *iter; line = _gtk_text_iter_get_text_line (iter); while (line && !found_after) { GSList *tmp_list; display = gtk_text_layout_get_line_display (layout, line, FALSE); if (display->height == 0) goto next; if (first) { line_byte = line_display_iter_to_index (layout, display, iter); first = FALSE; } else line_byte = 0; tmp_list = pango_layout_get_lines_readonly (display->layout); while (tmp_list && !found_after) { PangoLayoutLine *layout_line = tmp_list->data; if (found) { line_display_index_to_iter (layout, display, iter, layout_line->start_index, 0); found_after = TRUE; } else if (line_byte < layout_line->start_index + layout_line->length || !tmp_list->next) found = TRUE; tmp_list = tmp_list->next; } next: gtk_text_line_display_unref (display); line = _gtk_text_line_next_excluding_last (line); } if (!found_after) gtk_text_buffer_get_end_iter (layout->buffer, iter); return !gtk_text_iter_equal (iter, &orig) && !gtk_text_iter_is_end (iter); } /** * gtk_text_layout_move_iter_to_line_end: * @layout: a `GtkTextLayout` * @direction: if negative, move to beginning of line, otherwise move to end of line. * * Move to the beginning or end of a display line. **/ gboolean gtk_text_layout_move_iter_to_line_end (GtkTextLayout *layout, GtkTextIter *iter, int direction) { GtkTextLine *line; GtkTextLineDisplay *display; int line_byte; GSList *tmp_list; GtkTextIter orig; g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE); g_return_val_if_fail (iter != NULL, FALSE); orig = *iter; line = _gtk_text_iter_get_text_line (iter); display = gtk_text_layout_get_line_display (layout, line, FALSE); line_byte = line_display_iter_to_index (layout, display, iter); tmp_list = pango_layout_get_lines_readonly (display->layout); while (tmp_list) { PangoLayoutLine *layout_line = tmp_list->data; if (line_byte < layout_line->start_index + layout_line->length || !tmp_list->next) { line_display_index_to_iter (layout, display, iter, direction < 0 ? layout_line->start_index : layout_line->start_index + layout_line->length, 0); /* FIXME: As a bad hack, we move back one position when we * are inside a paragraph to avoid going to next line on a * forced break not at whitespace. Real fix is to keep track * of whether marks are at leading or trailing edge? */ if (direction > 0 && layout_line->length > 0 && !gtk_text_iter_ends_line (iter) && !_gtk_text_btree_char_is_invisible (iter)) gtk_text_iter_backward_char (iter); break; } tmp_list = tmp_list->next; } gtk_text_line_display_unref (display); return !gtk_text_iter_equal (iter, &orig) && !gtk_text_iter_is_end (iter); } /** * gtk_text_layout_iter_starts_line: * @layout: a `GtkTextLayout` * @iter: iterator to test * * Tests whether an iterator is at the start of a display line. **/ gboolean gtk_text_layout_iter_starts_line (GtkTextLayout *layout, const GtkTextIter *iter) { GtkTextLine *line; GtkTextLineDisplay *display; int line_byte; GSList *tmp_list; g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE); g_return_val_if_fail (iter != NULL, FALSE); line = _gtk_text_iter_get_text_line (iter); display = gtk_text_layout_get_line_display (layout, line, FALSE); line_byte = line_display_iter_to_index (layout, display, iter); tmp_list = pango_layout_get_lines_readonly (display->layout); while (tmp_list) { PangoLayoutLine *layout_line = tmp_list->data; if (line_byte < layout_line->start_index + layout_line->length || !tmp_list->next) { /* We're located on this line or the para delimiters before * it */ gtk_text_line_display_unref (display); if (line_byte == layout_line->start_index) return TRUE; else return FALSE; } tmp_list = tmp_list->next; } g_assert_not_reached (); return FALSE; } void gtk_text_layout_get_iter_at_line (GtkTextLayout *layout, GtkTextIter *iter, GtkTextLine *line, int byte_offset) { _gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer), iter, line, byte_offset); } /** * gtk_text_layout_move_iter_to_x: * @layout: a `GtkTextLayout` * @iter: a `GtkTextIter` * @x: X coordinate * * Keeping the iterator on the same line of the layout, move it to the * specified X coordinate. The lines of a wrapped paragraph are * treated as distinct for this operation. **/ void gtk_text_layout_move_iter_to_x (GtkTextLayout *layout, GtkTextIter *iter, int x) { GtkTextLine *line; GtkTextLineDisplay *display; int line_byte; PangoLayoutIter *layout_iter; g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); g_return_if_fail (iter != NULL); line = _gtk_text_iter_get_text_line (iter); display = gtk_text_layout_get_line_display (layout, line, FALSE); line_byte = line_display_iter_to_index (layout, display, iter); layout_iter = pango_layout_get_iter (display->layout); do { PangoLayoutLine *layout_line = pango_layout_iter_get_line_readonly (layout_iter); if (line_byte < layout_line->start_index + layout_line->length || pango_layout_iter_at_last_line (layout_iter)) { PangoRectangle logical_rect; int byte_index, trailing; int x_offset = display->x_offset * PANGO_SCALE; pango_layout_iter_get_line_extents (layout_iter, NULL, &logical_rect); pango_layout_line_x_to_index (layout_line, x * PANGO_SCALE - x_offset - logical_rect.x, &byte_index, &trailing); line_display_index_to_iter (layout, display, iter, byte_index, trailing); break; } } while (pango_layout_iter_next_line (layout_iter)); pango_layout_iter_free (layout_iter); gtk_text_line_display_unref (display); } /** * gtk_text_layout_move_iter_visually: * @layout: a `GtkTextLayout` * @iter: a `GtkTextIter` * @count: number of characters to move (negative moves left, positive moves right) * * Move the iterator a given number of characters visually, treating * it as the strong cursor position. If @count is positive, then the * new strong cursor position will be @count positions to the right of * the old cursor position. If @count is negative then the new strong * cursor position will be @count positions to the left of the old * cursor position. * * In the presence of bidirection text, the correspondence * between logical and visual order will depend on the direction * of the current run, and there may be jumps when the cursor * is moved off of the end of a run. **/ gboolean gtk_text_layout_move_iter_visually (GtkTextLayout *layout, GtkTextIter *iter, int count) { GtkTextLineDisplay *display = NULL; GtkTextIter orig; GtkTextIter lineiter; g_return_val_if_fail (layout != NULL, FALSE); g_return_val_if_fail (iter != NULL, FALSE); orig = *iter; while (count != 0) { GtkTextLine *line = _gtk_text_iter_get_text_line (iter); int line_byte; int extra_back = 0; gboolean strong; int byte_count = _gtk_text_line_byte_count (line); int new_index; int new_trailing; if (!display) display = gtk_text_layout_get_line_display (layout, line, FALSE); if (layout->cursor_direction == GTK_TEXT_DIR_NONE) strong = TRUE; else strong = display->direction == layout->cursor_direction; line_byte = line_display_iter_to_index (layout, display, iter); if (count > 0) { pango_layout_move_cursor_visually (display->layout, strong, line_byte, 0, 1, &new_index, &new_trailing); count--; } else { pango_layout_move_cursor_visually (display->layout, strong, line_byte, 0, -1, &new_index, &new_trailing); count++; } /* We need to handle the preedit string specially. Well, we don't really need to * handle it specially, since hopefully calling gtk_im_context_reset() will * remove the preedit string; but if we start off in front of the preedit * string (logically) and end up in or on the back edge of the preedit string, * we should move the iter one place farther. */ if (layout->preedit_len > 0 && display->insert_index >= 0) { if (line_byte == display->insert_index + layout->preedit_len && new_index < display->insert_index + layout->preedit_len) { line_byte = display->insert_index; extra_back = 1; } } if (new_index < 0 || (new_index == 0 && extra_back)) { do { line = _gtk_text_line_previous (line); if (!line) goto done; } while (totally_invisible_line (layout, line, &lineiter)); gtk_text_line_display_unref (display); display = gtk_text_layout_get_line_display (layout, line, FALSE); gtk_text_iter_forward_to_line_end (&lineiter); new_index = gtk_text_iter_get_visible_line_index (&lineiter); } else if (new_index > byte_count) { do { line = _gtk_text_line_next_excluding_last (line); if (!line) goto done; } while (totally_invisible_line (layout, line, &lineiter)); gtk_text_line_display_unref (display); display = gtk_text_layout_get_line_display (layout, line, FALSE); new_index = 0; } line_display_index_to_iter (layout, display, iter, new_index, new_trailing); if (extra_back) gtk_text_iter_backward_char (iter); } g_clear_pointer (&display, gtk_text_line_display_unref); done: return !gtk_text_iter_equal (iter, &orig) && !gtk_text_iter_is_end (iter); } void gtk_text_layout_spew (GtkTextLayout *layout) { #if 0 GtkTextDisplayLine *iter; guint wrapped = 0; guint paragraphs = 0; GtkTextLine *last_line = NULL; iter = layout->line_list; while (iter != NULL) { if (iter->line != last_line) { printf ("%5u paragraph (%p)\n", paragraphs, iter->line); ++paragraphs; last_line = iter->line; } printf (" %5u y: %d len: %d start: %d bytes: %d\n", wrapped, iter->y, iter->length, iter->byte_offset, iter->byte_count); ++wrapped; iter = iter->next; } printf ("Layout %s recompute\n", layout->need_recompute ? "needs" : "doesn't need"); printf ("Layout pars: %u lines: %u size: %d x %d Screen width: %d\n", paragraphs, wrapped, layout->width, layout->height, layout->screen_width); #endif } static void gtk_text_layout_before_mark_set_handler (GtkTextBuffer *buffer, const GtkTextIter *location, GtkTextMark *mark, gpointer data) { GtkTextLayout *layout = GTK_TEXT_LAYOUT (data); GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout); if (mark == gtk_text_buffer_get_insert (buffer)) gtk_text_line_display_cache_set_cursor_line (priv->cache, NULL); } /* Catch all situations that move the insertion point. */ static void gtk_text_layout_after_mark_set_handler (GtkTextBuffer *buffer, const GtkTextIter *location, GtkTextMark *mark, gpointer data) { GtkTextLayout *layout = GTK_TEXT_LAYOUT (data); GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout); if (mark == gtk_text_buffer_get_insert (buffer)) { gtk_text_layout_update_cursor_line (layout); gtk_text_line_display_cache_set_cursor_line (priv->cache, priv->cursor_line); } } static void gtk_text_layout_before_buffer_insert_text (GtkTextBuffer *textbuffer, GtkTextIter *iter, char *str, int len, gpointer data) { GtkTextLayout *layout = GTK_TEXT_LAYOUT (data); GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout); GtkTextLine *line = _gtk_text_iter_get_text_line (iter); gtk_text_line_display_cache_invalidate_line (priv->cache, line); } static void gtk_text_layout_after_buffer_insert_text (GtkTextBuffer *textbuffer, GtkTextIter *iter, char *str, int len, gpointer data) { GtkTextLayout *layout = GTK_TEXT_LAYOUT (data); gtk_text_layout_update_cursor_line (layout); } static void gtk_text_layout_before_buffer_delete_range (GtkTextBuffer *textbuffer, GtkTextIter *start, GtkTextIter *end, gpointer data) { GtkTextLayout *layout = GTK_TEXT_LAYOUT (data); GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout); gtk_text_line_display_cache_invalidate_range (priv->cache, layout, start, end, FALSE); } static void gtk_text_layout_after_buffer_delete_range (GtkTextBuffer *textbuffer, GtkTextIter *start, GtkTextIter *end, gpointer data) { GtkTextLayout *layout = GTK_TEXT_LAYOUT (data); gtk_text_layout_update_cursor_line (layout); } static void render_para (GskPangoRenderer *crenderer, GtkTextLineDisplay *line_display, int selection_start_index, int selection_end_index, const GdkRGBA *selection, gboolean draw_selection_text, float cursor_alpha) { PangoLayout *layout = line_display->layout; int byte_offset = 0; PangoLayoutIter *iter; int screen_width; gboolean first = TRUE; iter = pango_layout_get_iter (layout); screen_width = line_display->total_width; do { PangoLayoutLine *line = pango_layout_iter_get_line_readonly (iter); int selection_y, selection_height; int first_y, last_y; PangoRectangle line_rect; int baseline; gboolean at_last_line; pango_layout_iter_get_line_extents (iter, NULL, &line_rect); baseline = pango_layout_iter_get_baseline (iter); pango_layout_iter_get_line_yrange (iter, &first_y, &last_y); /* Adjust for margins */ line_rect.x += line_display->x_offset * PANGO_SCALE; line_rect.y += line_display->top_margin * PANGO_SCALE; baseline += line_display->top_margin * PANGO_SCALE; /* Selection is the height of the line, plus top/bottom * margin if we're the first/last line */ selection_y = PANGO_PIXELS (first_y) + line_display->top_margin; selection_height = PANGO_PIXELS (last_y) - PANGO_PIXELS (first_y); if (first) { selection_y -= line_display->top_margin; selection_height += line_display->top_margin; first = FALSE; } at_last_line = pango_layout_iter_at_last_line (iter); if (at_last_line) selection_height += line_display->bottom_margin; /* Don't draw the text underneath if the whole line is selected. We can * only do it if the selection is opaque. */ if (selection_start_index < byte_offset && selection_end_index > line->length + byte_offset && selection->alpha >= 1) { gtk_snapshot_append_color (crenderer->snapshot, selection, &GRAPHENE_RECT_INIT (line_display->left_margin, selection_y, screen_width, selection_height)); if (draw_selection_text) { gsk_pango_renderer_set_state (crenderer, GSK_PANGO_RENDERER_SELECTED); pango_renderer_draw_layout_line (PANGO_RENDERER (crenderer), line, line_rect.x, baseline); } } else { if (line_display->pg_bg_rgba_set) gtk_snapshot_append_color (crenderer->snapshot, &line_display->pg_bg_rgba, &GRAPHENE_RECT_INIT (line_display->left_margin, selection_y, screen_width, selection_height)); gsk_pango_renderer_set_state (crenderer, GSK_PANGO_RENDERER_NORMAL); pango_renderer_draw_layout_line (PANGO_RENDERER (crenderer), line, line_rect.x, baseline); /* Check if some part of the line is selected; the newline * that is after line->length for the last line of the * paragraph counts as part of the line for this */ if ((selection_start_index < byte_offset + line->length || (selection_start_index == byte_offset + line->length && pango_layout_iter_at_last_line (iter))) && selection_end_index > byte_offset) { int *ranges = NULL; int n_ranges, i; pango_layout_line_get_x_ranges (line, selection_start_index, selection_end_index, &ranges, &n_ranges); gsk_pango_renderer_set_state (crenderer, GSK_PANGO_RENDERER_SELECTED); for (i = 0; i < n_ranges; i++) { graphene_rect_t bounds; bounds.origin.x = line_display->x_offset + PANGO_PIXELS (ranges[2*i]); bounds.origin.y = selection_y; bounds.size.width = PANGO_PIXELS (ranges[2*i + 1]) - PANGO_PIXELS (ranges[2*i]); bounds.size.height = selection_height; if (bounds.origin.x < PANGO_PIXELS (line_rect.x)) { bounds.size.width -= PANGO_PIXELS (line_rect.x) - bounds.origin.x; bounds.origin.x = PANGO_PIXELS (line_rect.x); } bounds.size.width = MIN (bounds.size.width, PANGO_PIXELS (line_rect.x) + PANGO_PIXELS (line_rect.width) - bounds.origin.x); gtk_snapshot_append_color (crenderer->snapshot, selection, &bounds); if (draw_selection_text) { gtk_snapshot_push_clip (crenderer->snapshot, &bounds); pango_renderer_draw_layout_line (PANGO_RENDERER (crenderer), line, line_rect.x, baseline); gtk_snapshot_pop (crenderer->snapshot); } } g_free (ranges); /* Paint in the ends of the line */ if (line_rect.x > line_display->left_margin * PANGO_SCALE && ((line_display->direction == GTK_TEXT_DIR_LTR && selection_start_index < byte_offset) || (line_display->direction == GTK_TEXT_DIR_RTL && selection_end_index > byte_offset + line->length))) gtk_snapshot_append_color (crenderer->snapshot, selection, &GRAPHENE_RECT_INIT (line_display->left_margin, selection_y, PANGO_PIXELS (line_rect.x) - line_display->left_margin, selection_height)); if (line_rect.x + line_rect.width < (screen_width + line_display->left_margin) * PANGO_SCALE && ((line_display->direction == GTK_TEXT_DIR_LTR && selection_end_index > byte_offset + line->length) || (line_display->direction == GTK_TEXT_DIR_RTL && selection_start_index < byte_offset))) { int nonlayout_width = line_display->left_margin + screen_width - PANGO_PIXELS (line_rect.x) - PANGO_PIXELS (line_rect.width); gtk_snapshot_append_color (crenderer->snapshot, selection, &GRAPHENE_RECT_INIT (PANGO_PIXELS (line_rect.x) + PANGO_PIXELS (line_rect.width), selection_y, nonlayout_width, selection_height)); } } else if (line_display->has_block_cursor && gtk_widget_has_focus (crenderer->widget) && cursor_alpha > 0 && byte_offset <= line_display->insert_index && (line_display->insert_index < byte_offset + line->length || (at_last_line && line_display->insert_index == byte_offset + line->length))) { GtkStyleContext *context; GdkRGBA cursor_color; graphene_rect_t bounds = { .origin.x = line_display->x_offset + line_display->block_cursor.x, .origin.y = line_display->block_cursor.y + line_display->top_margin, .size.width = line_display->block_cursor.width, .size.height = line_display->block_cursor.height, }; /* we draw text using base color on filled cursor rectangle * of cursor color (normally white on black) */ context = _gtk_widget_get_style_context (crenderer->widget); _gtk_style_context_get_cursor_color (context, &cursor_color, NULL); gtk_snapshot_push_opacity (crenderer->snapshot, cursor_alpha); gtk_snapshot_append_color (crenderer->snapshot, &cursor_color, &bounds); /* draw text under the cursor if any */ if (!line_display->cursor_at_line_end) { gsk_pango_renderer_set_state (crenderer, GSK_PANGO_RENDERER_CURSOR); gtk_snapshot_push_clip (crenderer->snapshot, &bounds); pango_renderer_draw_layout_line (PANGO_RENDERER (crenderer), line, line_rect.x, baseline); gtk_snapshot_pop (crenderer->snapshot); } gtk_snapshot_pop (crenderer->snapshot); } } byte_offset += line->length; } while (pango_layout_iter_next_line (iter)); pango_layout_iter_free (iter); } static gboolean snapshot_shape (PangoAttrShape *attr, GdkSnapshot *snapshot, double width, double height) { if (GDK_IS_PAINTABLE (attr->data)) { gdk_paintable_snapshot (GDK_PAINTABLE (attr->data), snapshot, width, height); return TRUE; } return FALSE; } void gtk_text_layout_snapshot (GtkTextLayout *layout, GtkWidget *widget, GtkSnapshot *snapshot, const GdkRectangle *clip, float cursor_alpha) { GtkTextLayoutPrivate *priv; GskPangoRenderer *crenderer; GtkStyleContext *context; int offset_y; GtkTextIter selection_start, selection_end; int selection_start_line; int selection_end_line; gboolean have_selection; gboolean draw_selection_text; const GdkRGBA *selection; GdkRGBA color; GtkSnapshot *cursor_snapshot; GtkTextBTree *btree; GtkTextLine *first_line; GtkTextLine *last_line; g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout)); g_return_if_fail (layout->default_style != NULL); g_return_if_fail (layout->buffer != NULL); g_return_if_fail (snapshot != NULL); priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout); if (clip->height <= 0) return; btree = _gtk_text_buffer_get_btree (layout->buffer); first_line = _gtk_text_btree_find_line_by_y (btree, layout, clip->y, &offset_y); if (first_line == NULL) return; last_line = _gtk_text_btree_find_line_by_y (btree, layout, clip->y + clip->height - 1, NULL); if (last_line == NULL) last_line = _gtk_text_btree_get_end_iter_line (btree); context = gtk_widget_get_style_context (widget); gtk_style_context_get_color (context, &color); gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (0, offset_y)); offset_y = 0; cursor_snapshot = NULL; crenderer = gsk_pango_renderer_acquire (); gsk_pango_renderer_set_shape_handler (crenderer, snapshot_shape); crenderer->widget = widget; crenderer->snapshot = snapshot; crenderer->fg_color = &color; have_selection = gtk_text_buffer_get_selection_bounds (layout->buffer, &selection_start, &selection_end); if (have_selection) { GtkCssNode *selection_node; GdkRGBA text_color; selection_start_line = gtk_text_iter_get_line (&selection_start); selection_end_line = gtk_text_iter_get_line (&selection_end); selection_node = gtk_text_view_get_selection_node ((GtkTextView*)widget); gtk_style_context_save_to_node (context, selection_node); selection = gtk_css_color_value_get_rgba (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BACKGROUND_COLOR)); gtk_style_context_get_color (context, &text_color); draw_selection_text = text_color.alpha > 0; gtk_style_context_restore (context); } else { selection_start_line = -1; selection_end_line = -1; selection = NULL; draw_selection_text = FALSE; } gtk_text_layout_wrap_loop_start (layout); for (GtkTextLine *line = first_line; line != NULL; line = _gtk_text_line_next_excluding_last (line)) { GtkTextLineDisplay *line_display; int selection_start_index = -1; int selection_end_index = -1; line_display = gtk_text_layout_get_line_display (layout, line, FALSE); if (line_display->height > 0) { g_assert (line_display->layout != NULL); if (have_selection) { GtkTextIter line_start; int current_line; gtk_text_layout_get_iter_at_line (layout, &line_start, line, 0); current_line = gtk_text_iter_get_line (&line_start); if (selection_start_line < current_line) selection_start_index = -1; else if (selection_start_line == current_line) selection_start_index = gtk_text_iter_get_visible_line_index (&selection_start); else selection_start_index = -1; if (selection_end_line < current_line) { selection_end_index = -1; have_selection = FALSE; } else if (selection_end_line == current_line) selection_end_index = gtk_text_iter_get_visible_line_index (&selection_end); else if (selection_start_line <= current_line) { GtkTextIter line_end = line_start; int byte_count; if (!gtk_text_iter_ends_line (&line_end)) gtk_text_iter_forward_to_line_end (&line_end); byte_count = gtk_text_iter_get_visible_line_index (&line_end); selection_end_index = byte_count + 1; /* + 1 to flag past-the-end */ } else selection_end_index = -1; } if (line_display->node != NULL) { if (line_display->has_block_cursor && gtk_widget_has_focus (widget)) g_clear_pointer (&line_display->node, gsk_render_node_unref); } if (line_display->node == NULL && (pango_layout_get_character_count (line_display->layout) > 0 || selection_start_index != -1 || selection_end_index != -1 || line_display->has_block_cursor)) { gtk_snapshot_push_collect (snapshot); render_para (crenderer, line_display, selection_start_index, selection_end_index, selection, draw_selection_text, cursor_alpha); line_display->node = gtk_snapshot_pop_collect (snapshot); } if (line_display->node != NULL) { gtk_snapshot_save (crenderer->snapshot); gtk_snapshot_translate (crenderer->snapshot, &GRAPHENE_POINT_INIT (0, offset_y)); gtk_snapshot_append_node (crenderer->snapshot, line_display->node); gtk_snapshot_restore (crenderer->snapshot); } /* We paint the cursors last, because they overlap another chunk * and need to appear on top. */ if (line_display->cursors != NULL) { if (cursor_snapshot == NULL) cursor_snapshot = gtk_snapshot_new (); for (int i = 0; i < line_display->cursors->len; i++) { PangoDirection dir; CursorPosition cursor; cursor = g_array_index (line_display->cursors, CursorPosition, i); dir = (line_display->direction == GTK_TEXT_DIR_RTL) ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR; if (cursor.is_insert || cursor.is_selection_bound) gtk_snapshot_push_opacity (cursor_snapshot, cursor_alpha); gtk_snapshot_render_insertion_cursor (cursor_snapshot, context, line_display->x_offset, offset_y + line_display->top_margin, line_display->layout, cursor.pos, dir); if (cursor.is_insert || cursor.is_selection_bound) gtk_snapshot_pop (cursor_snapshot); } } } /* line_display->height > 0 */ offset_y += line_display->height; gtk_text_line_display_unref (line_display); if (line == last_line) break; } gtk_text_layout_wrap_loop_end (layout); if (cursor_snapshot) { GskRenderNode *cursors; cursors = gtk_snapshot_free_to_node (cursor_snapshot); if (cursors) { gtk_snapshot_append_node (crenderer->snapshot, cursors); gsk_render_node_unref (cursors); } } /* Only update eviction source once per snapshot */ gtk_text_line_display_cache_delay_eviction (priv->cache); gsk_pango_renderer_release (crenderer); } int gtk_text_line_display_compare (const GtkTextLineDisplay *display1, const GtkTextLineDisplay *display2, GtkTextLayout *layout) { int line1; int line2; line1 = _gtk_text_line_get_number (display1->line); line2 = _gtk_text_line_get_number (display2->line); if (line1 < line2) return -1; else if (line1 > line2) return 1; else return 0; } void gtk_text_layout_set_mru_size (GtkTextLayout *layout, guint mru_size) { GtkTextLayoutPrivate *priv = GTK_TEXT_LAYOUT_GET_PRIVATE (layout); gtk_text_line_display_cache_set_mru_size (priv->cache, mru_size); }