/* gtktextdisplay.c - display layed-out 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 * * 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/. */ #define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API #include "config.h" #include "gtktextdisplay.h" #include "gtkwidgetprivate.h" #include "gtkstylecontextprivate.h" #include "gtkintl.h" /* DO NOT go putting private headers in here. This file should only * use the semi-public headers, as with gtktextview.c. */ #define GTK_TYPE_TEXT_RENDERER (_gtk_text_renderer_get_type()) #define GTK_TEXT_RENDERER(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GTK_TYPE_TEXT_RENDERER, GtkTextRenderer)) #define GTK_IS_TEXT_RENDERER(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GTK_TYPE_TEXT_RENDERER)) #define GTK_TEXT_RENDERER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_TEXT_RENDERER, GtkTextRendererClass)) #define GTK_IS_TEXT_RENDERER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_TEXT_RENDERER)) #define GTK_TEXT_RENDERER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_TEXT_RENDERER, GtkTextRendererClass)) typedef struct _GtkTextRenderer GtkTextRenderer; typedef struct _GtkTextRendererClass GtkTextRendererClass; enum { NORMAL, SELECTED, CURSOR }; struct _GtkTextRenderer { PangoRenderer parent_instance; GtkWidget *widget; cairo_t *cr; GdkRGBA *error_color; /* Error underline color for this widget */ GList *widgets; /* widgets encountered when drawing */ GdkRGBA rgba[4]; guint8 rgba_set[4]; guint state : 2; }; struct _GtkTextRendererClass { PangoRendererClass parent_class; }; GType _gtk_text_renderer_get_type (void); G_DEFINE_TYPE (GtkTextRenderer, _gtk_text_renderer, PANGO_TYPE_RENDERER) static void text_renderer_set_rgba (GtkTextRenderer *text_renderer, PangoRenderPart part, const GdkRGBA *rgba) { PangoRenderer *renderer = PANGO_RENDERER (text_renderer); PangoColor dummy = { 0, }; if (rgba) { text_renderer->rgba[part] = *rgba; pango_renderer_set_color (renderer, part, &dummy); } else pango_renderer_set_color (renderer, part, NULL); text_renderer->rgba_set[part] = (rgba != NULL); } static GtkTextAppearance * get_item_appearance (PangoItem *item) { GSList *tmp_list = item->analysis.extra_attrs; while (tmp_list) { PangoAttribute *attr = tmp_list->data; if (attr->klass->type == gtk_text_attr_appearance_type) return &((GtkTextAttrAppearance *)attr)->appearance; tmp_list = tmp_list->next; } return NULL; } static void gtk_text_renderer_prepare_run (PangoRenderer *renderer, PangoLayoutRun *run) { GtkStyleContext *context; GtkStateFlags state; GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer); GdkRGBA *bg_rgba = NULL; GdkRGBA *fg_rgba = NULL; GtkTextAppearance *appearance; PANGO_RENDERER_CLASS (_gtk_text_renderer_parent_class)->prepare_run (renderer, run); appearance = get_item_appearance (run->item); g_assert (appearance != NULL); context = gtk_widget_get_style_context (text_renderer->widget); state = gtk_widget_get_state_flags (text_renderer->widget); if (appearance->draw_bg && text_renderer->state == NORMAL) bg_rgba = appearance->rgba[0]; else bg_rgba = NULL; text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_BACKGROUND, bg_rgba); if (text_renderer->state == SELECTED) { state |= GTK_STATE_FLAG_SELECTED; gtk_style_context_get (context, state, "color", &fg_rgba, NULL); } else if (text_renderer->state == CURSOR && gtk_widget_has_focus (text_renderer->widget)) { gtk_style_context_get (context, state, "background-color", &fg_rgba, NULL); } else fg_rgba = appearance->rgba[1]; text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_FOREGROUND, fg_rgba); text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_STRIKETHROUGH, fg_rgba); if (appearance->underline == PANGO_UNDERLINE_ERROR) { if (!text_renderer->error_color) { GdkColor *color = NULL; gtk_style_context_get_style (context, "error-underline-color", &color, NULL); if (color) { GdkRGBA rgba; rgba.red = color->red / 65535.; rgba.green = color->green / 65535.; rgba.blue = color->blue / 65535.; rgba.alpha = 1; G_GNUC_BEGIN_IGNORE_DEPRECATIONS gdk_color_free (color); G_GNUC_END_IGNORE_DEPRECATIONS text_renderer->error_color = gdk_rgba_copy (&rgba); } else { static const GdkRGBA red = { 1, 0, 0, 1 }; text_renderer->error_color = gdk_rgba_copy (&red); } } text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_UNDERLINE, text_renderer->error_color); } else text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_UNDERLINE, fg_rgba); if (fg_rgba != appearance->rgba[1]) gdk_rgba_free (fg_rgba); } static void set_color (GtkTextRenderer *text_renderer, PangoRenderPart part) { cairo_save (text_renderer->cr); if (text_renderer->rgba_set[part]) gdk_cairo_set_source_rgba (text_renderer->cr, &text_renderer->rgba[part]); } static void unset_color (GtkTextRenderer *text_renderer) { cairo_restore (text_renderer->cr); } static void gtk_text_renderer_draw_glyphs (PangoRenderer *renderer, PangoFont *font, PangoGlyphString *glyphs, int x, int y) { GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer); set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND); cairo_move_to (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE); pango_cairo_show_glyph_string (text_renderer->cr, font, glyphs); unset_color (text_renderer); } static void gtk_text_renderer_draw_glyph_item (PangoRenderer *renderer, const char *text, PangoGlyphItem *glyph_item, int x, int y) { GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer); set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND); cairo_move_to (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE); pango_cairo_show_glyph_item (text_renderer->cr, text, glyph_item); unset_color (text_renderer); } static void gtk_text_renderer_draw_rectangle (PangoRenderer *renderer, PangoRenderPart part, int x, int y, int width, int height) { GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer); set_color (text_renderer, part); cairo_rectangle (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE, (double)width / PANGO_SCALE, (double)height / PANGO_SCALE); cairo_fill (text_renderer->cr); unset_color (text_renderer); } static void gtk_text_renderer_draw_trapezoid (PangoRenderer *renderer, PangoRenderPart part, double y1_, double x11, double x21, double y2, double x12, double x22) { GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer); cairo_t *cr; cairo_matrix_t matrix; set_color (text_renderer, part); cr = text_renderer->cr; cairo_get_matrix (cr, &matrix); matrix.xx = matrix.yy = 1.0; matrix.xy = matrix.yx = 0.0; cairo_set_matrix (cr, &matrix); cairo_move_to (cr, x11, y1_); cairo_line_to (cr, x21, y1_); cairo_line_to (cr, x22, y2); cairo_line_to (cr, x12, y2); cairo_close_path (cr); cairo_fill (cr); unset_color (text_renderer); } static void gtk_text_renderer_draw_error_underline (PangoRenderer *renderer, int x, int y, int width, int height) { GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer); set_color (text_renderer, PANGO_RENDER_PART_UNDERLINE); pango_cairo_show_error_underline (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE, (double)width / PANGO_SCALE, (double)height / PANGO_SCALE); unset_color (text_renderer); } static void gtk_text_renderer_draw_shape (PangoRenderer *renderer, PangoAttrShape *attr, int x, int y) { GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer); if (attr->data == NULL) { /* This happens if we have an empty widget anchor. Draw * something empty-looking. */ GdkRectangle shape_rect; cairo_t *cr; shape_rect.x = PANGO_PIXELS (x); shape_rect.y = PANGO_PIXELS (y + attr->logical_rect.y); shape_rect.width = PANGO_PIXELS (x + attr->logical_rect.width) - shape_rect.x; shape_rect.height = PANGO_PIXELS (y + attr->logical_rect.y + attr->logical_rect.height) - shape_rect.y; set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND); cr = text_renderer->cr; cairo_set_line_width (cr, 1.0); cairo_rectangle (cr, shape_rect.x + 0.5, shape_rect.y + 0.5, shape_rect.width - 1, shape_rect.height - 1); cairo_move_to (cr, shape_rect.x + 0.5, shape_rect.y + 0.5); cairo_line_to (cr, shape_rect.x + shape_rect.width - 0.5, shape_rect.y + shape_rect.height - 0.5); cairo_move_to (cr, shape_rect.x + 0.5, shape_rect.y + shape_rect.height - 0.5); cairo_line_to (cr, shape_rect.x + shape_rect.width - 0.5, shape_rect.y + 0.5); cairo_stroke (cr); unset_color (text_renderer); } else if (GDK_IS_PIXBUF (attr->data)) { cairo_t *cr = text_renderer->cr; GdkPixbuf *pixbuf = GDK_PIXBUF (attr->data); cairo_save (cr); gdk_cairo_set_source_pixbuf (cr, pixbuf, PANGO_PIXELS (x), PANGO_PIXELS (y) - gdk_pixbuf_get_height (pixbuf)); cairo_paint (cr); cairo_restore (cr); } else if (GTK_IS_WIDGET (attr->data)) { GtkWidget *widget; widget = GTK_WIDGET (attr->data); text_renderer->widgets = g_list_prepend (text_renderer->widgets, g_object_ref (widget)); } else g_assert_not_reached (); /* not a pixbuf or widget */ } static void gtk_text_renderer_finalize (GObject *object) { G_OBJECT_CLASS (_gtk_text_renderer_parent_class)->finalize (object); } static void _gtk_text_renderer_init (GtkTextRenderer *renderer) { } static void _gtk_text_renderer_class_init (GtkTextRendererClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); PangoRendererClass *renderer_class = PANGO_RENDERER_CLASS (klass); renderer_class->prepare_run = gtk_text_renderer_prepare_run; renderer_class->draw_glyphs = gtk_text_renderer_draw_glyphs; renderer_class->draw_glyph_item = gtk_text_renderer_draw_glyph_item; renderer_class->draw_rectangle = gtk_text_renderer_draw_rectangle; renderer_class->draw_trapezoid = gtk_text_renderer_draw_trapezoid; renderer_class->draw_error_underline = gtk_text_renderer_draw_error_underline; renderer_class->draw_shape = gtk_text_renderer_draw_shape; object_class->finalize = gtk_text_renderer_finalize; } static void text_renderer_set_state (GtkTextRenderer *text_renderer, int state) { text_renderer->state = state; } static void text_renderer_begin (GtkTextRenderer *text_renderer, GtkWidget *widget, cairo_t *cr) { GtkStyleContext *context; GtkStateFlags state; GdkRGBA color; text_renderer->widget = widget; text_renderer->cr = cr; context = gtk_widget_get_style_context (widget); gtk_style_context_save (context); gtk_style_context_add_class (context, GTK_STYLE_CLASS_VIEW); state = gtk_widget_get_state_flags (widget); gtk_style_context_get_color (context, state, &color); cairo_save (cr); gdk_cairo_set_source_rgba (cr, &color); } /* Returns a GSList of (referenced) widgets encountered while drawing. */ static GList * text_renderer_end (GtkTextRenderer *text_renderer) { GtkStyleContext *context; GList *widgets = text_renderer->widgets; cairo_restore (text_renderer->cr); context = gtk_widget_get_style_context (text_renderer->widget); gtk_style_context_restore (context); text_renderer->widget = NULL; text_renderer->cr = NULL; text_renderer->widgets = NULL; if (text_renderer->error_color) { gdk_rgba_free (text_renderer->error_color); text_renderer->error_color = NULL; } return widgets; } static cairo_region_t * get_selected_clip (GtkTextRenderer *text_renderer, PangoLayout *layout, PangoLayoutLine *line, int x, int y, int height, int start_index, int end_index) { gint *ranges; gint n_ranges, i; cairo_region_t *clip_region = cairo_region_create (); pango_layout_line_get_x_ranges (line, start_index, end_index, &ranges, &n_ranges); for (i=0; i < n_ranges; i++) { GdkRectangle rect; rect.x = x + PANGO_PIXELS (ranges[2*i]); rect.y = y; rect.width = PANGO_PIXELS (ranges[2*i + 1]) - PANGO_PIXELS (ranges[2*i]); rect.height = height; cairo_region_union_rectangle (clip_region, &rect); } g_free (ranges); return clip_region; } static void render_para (GtkTextRenderer *text_renderer, GtkTextLineDisplay *line_display, int selection_start_index, int selection_end_index) { GtkStyleContext *context; GtkStateFlags state; PangoLayout *layout = line_display->layout; int byte_offset = 0; PangoLayoutIter *iter; PangoRectangle layout_logical; int screen_width; GdkRGBA selection; gboolean first = TRUE; iter = pango_layout_get_iter (layout); pango_layout_iter_get_layout_extents (iter, NULL, &layout_logical); /* Adjust for margins */ layout_logical.x += line_display->x_offset * PANGO_SCALE; layout_logical.y += line_display->top_margin * PANGO_SCALE; screen_width = line_display->total_width; context = gtk_widget_get_style_context (text_renderer->widget); state = gtk_widget_get_state_flags (text_renderer->widget); state |= GTK_STATE_FLAG_SELECTED; G_GNUC_BEGIN_IGNORE_DEPRECATIONS gtk_style_context_get_background_color (context, state, &selection); G_GNUC_END_IGNORE_DEPRECATIONS 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; } at_last_line = pango_layout_iter_at_last_line (iter); if (at_last_line) selection_height += line_display->bottom_margin; first = FALSE; if (selection_start_index < byte_offset && selection_end_index > line->length + byte_offset) /* All selected */ { cairo_t *cr = text_renderer->cr; cairo_save (cr); gdk_cairo_set_source_rgba (cr, &selection); cairo_rectangle (cr, line_display->left_margin, selection_y, screen_width, selection_height); cairo_fill (cr); cairo_restore(cr); text_renderer_set_state (text_renderer, SELECTED); pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer), line, line_rect.x, baseline); } else { if (line_display->pg_bg_rgba) { cairo_t *cr = text_renderer->cr; cairo_save (cr); gdk_cairo_set_source_rgba (text_renderer->cr, line_display->pg_bg_rgba); cairo_rectangle (cr, line_display->left_margin, selection_y, screen_width, selection_height); cairo_fill (cr); cairo_restore (cr); } text_renderer_set_state (text_renderer, NORMAL); pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer), 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) { cairo_t *cr = text_renderer->cr; cairo_region_t *clip_region = get_selected_clip (text_renderer, layout, line, line_display->x_offset, selection_y, selection_height, selection_start_index, selection_end_index); cairo_save (cr); gdk_cairo_region (cr, clip_region); cairo_clip (cr); cairo_region_destroy (clip_region); gdk_cairo_set_source_rgba (cr, &selection); cairo_rectangle (cr, PANGO_PIXELS (line_rect.x), selection_y, PANGO_PIXELS (line_rect.width), selection_height); cairo_fill (cr); text_renderer_set_state (text_renderer, SELECTED); pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer), line, line_rect.x, baseline); cairo_restore (cr); /* 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))) { cairo_save (cr); gdk_cairo_set_source_rgba (cr, &selection); cairo_rectangle (cr, line_display->left_margin, selection_y, PANGO_PIXELS (line_rect.x) - line_display->left_margin, selection_height); cairo_fill (cr); cairo_restore (cr); } 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; nonlayout_width = line_display->left_margin + screen_width - PANGO_PIXELS (line_rect.x) - PANGO_PIXELS (line_rect.width); cairo_save (cr); gdk_cairo_set_source_rgba (cr, &selection); cairo_rectangle (cr, PANGO_PIXELS (line_rect.x) + PANGO_PIXELS (line_rect.width), selection_y, nonlayout_width, selection_height); cairo_fill (cr); cairo_restore (cr); } } else if (line_display->has_block_cursor && gtk_widget_has_focus (text_renderer->widget) && 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))) { GdkRectangle cursor_rect; GdkRGBA cursor_color; cairo_t *cr = text_renderer->cr; /* we draw text using base color on filled cursor rectangle of cursor color * (normally white on black) */ _gtk_style_context_get_cursor_color (context, &cursor_color, NULL); cursor_rect.x = line_display->x_offset + line_display->block_cursor.x; cursor_rect.y = line_display->block_cursor.y + line_display->top_margin; cursor_rect.width = line_display->block_cursor.width; cursor_rect.height = line_display->block_cursor.height; cairo_save (cr); gdk_cairo_rectangle (cr, &cursor_rect); cairo_clip (cr); gdk_cairo_set_source_rgba (cr, &cursor_color); cairo_paint (cr); /* draw text under the cursor if any */ if (!line_display->cursor_at_line_end) { GdkRGBA color; state = gtk_widget_get_state_flags (text_renderer->widget); G_GNUC_BEGIN_IGNORE_DEPRECATIONS gtk_style_context_get_background_color (context, state, &color); G_GNUC_END_IGNORE_DEPRECATIONS gdk_cairo_set_source_rgba (cr, &color); text_renderer_set_state (text_renderer, CURSOR); pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer), line, line_rect.x, baseline); } cairo_restore (cr); } } byte_offset += line->length; } while (pango_layout_iter_next_line (iter)); pango_layout_iter_free (iter); } static GtkTextRenderer * get_text_renderer (void) { static GtkTextRenderer *text_renderer = NULL; if (!text_renderer) text_renderer = g_object_new (GTK_TYPE_TEXT_RENDERER, NULL); return text_renderer; } void gtk_text_layout_draw (GtkTextLayout *layout, GtkWidget *widget, cairo_t *cr, GList **widgets) { GtkStyleContext *context; gint offset_y; GtkTextRenderer *text_renderer; GtkTextIter selection_start, selection_end; gboolean have_selection; GSList *line_list; GSList *tmp_list; GList *tmp_widgets; GdkRectangle clip; 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 (cr != NULL); if (!gdk_cairo_get_clip_rectangle (cr, &clip)) return; context = gtk_widget_get_style_context (widget); line_list = gtk_text_layout_get_lines (layout, clip.y, clip.y + clip.height, &offset_y); if (line_list == NULL) return; /* nothing on the screen */ text_renderer = get_text_renderer (); text_renderer_begin (text_renderer, widget, cr); /* text_renderer_begin/end does cairo_save/restore */ cairo_translate (cr, 0, offset_y); gtk_text_layout_wrap_loop_start (layout); have_selection = gtk_text_buffer_get_selection_bounds (layout->buffer, &selection_start, &selection_end); tmp_list = line_list; while (tmp_list != NULL) { GtkTextLineDisplay *line_display; gint selection_start_index = -1; gint selection_end_index = -1; GtkTextLine *line = tmp_list->data; 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, line_end; gint byte_count; gtk_text_layout_get_iter_at_line (layout, &line_start, line, 0); line_end = line_start; 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); if (gtk_text_iter_compare (&selection_start, &line_end) <= 0 && gtk_text_iter_compare (&selection_end, &line_start) >= 0) { if (gtk_text_iter_compare (&selection_start, &line_start) >= 0) selection_start_index = gtk_text_iter_get_visible_line_index (&selection_start); else selection_start_index = -1; if (gtk_text_iter_compare (&selection_end, &line_end) <= 0) selection_end_index = gtk_text_iter_get_visible_line_index (&selection_end); else selection_end_index = byte_count + 1; /* + 1 to flag past-the-end */ } } render_para (text_renderer, line_display, selection_start_index, selection_end_index); /* We paint the cursors last, because they overlap another chunk * and need to appear on top. */ if (line_display->cursors != NULL) { int i; for (i = 0; i < line_display->cursors->len; i++) { int index; PangoDirection dir; index = g_array_index(line_display->cursors, int, i); dir = (line_display->direction == GTK_TEXT_DIR_RTL) ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR; gtk_render_insertion_cursor (context, cr, line_display->x_offset, line_display->top_margin, line_display->layout, index, dir); } } } /* line_display->height > 0 */ cairo_translate (cr, 0, line_display->height); gtk_text_layout_free_line_display (layout, line_display); tmp_list = g_slist_next (tmp_list); } gtk_text_layout_wrap_loop_end (layout); tmp_widgets = text_renderer_end (text_renderer); if (widgets) *widgets = tmp_widgets; else g_list_free_full (tmp_widgets, g_object_unref); g_slist_free (line_list); }