438 lines
13 KiB
C
438 lines
13 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; coding: utf-8 -*-
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* gtksourcegutterrenderertext.c
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* This file is part of GtkSourceView
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*
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* Copyright (C) 2010 - Jesse van den Kieboom
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*
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* GtkSourceView is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* GtkSourceView is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "gtksourcegutterrenderertext.h"
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#include "gtksourceview-i18n.h"
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/**
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* SECTION:gutterrenderertext
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* @Short_description: Renders text in the gutter
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* @Title: GtkSourceGutterRendererText
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* @See_also: #GtkSourceGutterRenderer, #GtkSourceGutter
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*
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* A #GtkSourceGutterRendererText can be used to render text in a cell of
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* #GtkSourceGutter.
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*/
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struct _GtkSourceGutterRendererTextPrivate
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{
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gchar *text;
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PangoLayout *cached_layout;
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guint is_markup : 1;
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};
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G_DEFINE_TYPE_WITH_PRIVATE (GtkSourceGutterRendererText, gtk_source_gutter_renderer_text, GTK_SOURCE_TYPE_GUTTER_RENDERER)
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enum
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{
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PROP_0,
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PROP_MARKUP,
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PROP_TEXT
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};
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static void
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gutter_renderer_text_begin (GtkSourceGutterRenderer *renderer,
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cairo_t *cr,
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GdkRectangle *background_area,
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GdkRectangle *cell_area,
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GtkTextIter *start,
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GtkTextIter *end)
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{
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GtkSourceGutterRendererText *text = GTK_SOURCE_GUTTER_RENDERER_TEXT (renderer);
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GtkTextView *view;
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view = gtk_source_gutter_renderer_get_view (renderer);
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g_clear_object (&text->priv->cached_layout);
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text->priv->cached_layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
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if (GTK_SOURCE_GUTTER_RENDERER_CLASS (gtk_source_gutter_renderer_text_parent_class)->begin != NULL)
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{
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GTK_SOURCE_GUTTER_RENDERER_CLASS (gtk_source_gutter_renderer_text_parent_class)->begin (renderer,
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cr,
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background_area,
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cell_area,
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start,
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end);
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}
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}
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static void
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center_on (GtkTextView *view,
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GdkRectangle *cell_area,
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GtkTextIter *iter,
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gint width,
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gint height,
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gfloat xalign,
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gfloat yalign,
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gint *x,
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gint *y)
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{
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GdkRectangle location;
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gtk_text_view_get_iter_location (view, iter, &location);
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*x = cell_area->x + (cell_area->width - width) * xalign;
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*y = cell_area->y + (location.height - height) * yalign;
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}
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static void
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gutter_renderer_text_draw (GtkSourceGutterRenderer *renderer,
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cairo_t *cr,
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GdkRectangle *background_area,
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GdkRectangle *cell_area,
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GtkTextIter *start,
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GtkTextIter *end,
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GtkSourceGutterRendererState state)
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{
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GtkSourceGutterRendererText *text = GTK_SOURCE_GUTTER_RENDERER_TEXT (renderer);
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GtkTextView *view;
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gint width;
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gint height;
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gfloat xalign;
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gfloat yalign;
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GtkSourceGutterRendererAlignmentMode mode;
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gint x = 0;
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gint y = 0;
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GtkStyleContext *context;
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/* Chain up to draw background */
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if (GTK_SOURCE_GUTTER_RENDERER_CLASS (gtk_source_gutter_renderer_text_parent_class)->draw != NULL)
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{
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GTK_SOURCE_GUTTER_RENDERER_CLASS (gtk_source_gutter_renderer_text_parent_class)->draw (renderer,
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cr,
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background_area,
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cell_area,
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start,
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end,
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state);
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}
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view = gtk_source_gutter_renderer_get_view (renderer);
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if (text->priv->is_markup)
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{
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pango_layout_set_markup (text->priv->cached_layout,
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text->priv->text,
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-1);
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}
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else
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{
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pango_layout_set_text (text->priv->cached_layout,
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text->priv->text,
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-1);
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}
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pango_layout_get_pixel_size (text->priv->cached_layout, &width, &height);
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gtk_source_gutter_renderer_get_alignment (renderer,
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&xalign,
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&yalign);
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/* Avoid calculations if we don't wrap text */
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if (gtk_text_view_get_wrap_mode (view) == GTK_WRAP_NONE)
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{
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mode = GTK_SOURCE_GUTTER_RENDERER_ALIGNMENT_MODE_CELL;
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}
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else
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{
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mode = gtk_source_gutter_renderer_get_alignment_mode (renderer);
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}
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switch (mode)
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{
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case GTK_SOURCE_GUTTER_RENDERER_ALIGNMENT_MODE_CELL:
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x = cell_area->x + (cell_area->width - width) * xalign;
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y = cell_area->y + (cell_area->height - height) * yalign;
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break;
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case GTK_SOURCE_GUTTER_RENDERER_ALIGNMENT_MODE_FIRST:
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center_on (view,
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cell_area,
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start,
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width,
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height,
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xalign,
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yalign,
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&x,
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&y);
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break;
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case GTK_SOURCE_GUTTER_RENDERER_ALIGNMENT_MODE_LAST:
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center_on (view,
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cell_area,
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end,
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width,
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height,
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xalign,
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yalign,
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&x,
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&y);
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break;
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default:
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g_assert_not_reached ();
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}
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context = gtk_widget_get_style_context (GTK_WIDGET (view));
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gtk_render_layout (context, cr, x, y, text->priv->cached_layout);
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}
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static void
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gutter_renderer_text_end (GtkSourceGutterRenderer *renderer)
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{
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GtkSourceGutterRendererText *text = GTK_SOURCE_GUTTER_RENDERER_TEXT (renderer);
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g_clear_object (&text->priv->cached_layout);
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if (GTK_SOURCE_GUTTER_RENDERER_CLASS (gtk_source_gutter_renderer_text_parent_class)->end != NULL)
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{
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GTK_SOURCE_GUTTER_RENDERER_CLASS (gtk_source_gutter_renderer_text_parent_class)->end (renderer);
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}
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}
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static void
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measure_text (GtkSourceGutterRendererText *renderer,
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const gchar *markup,
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const gchar *text,
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gint *width,
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gint *height)
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{
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GtkTextView *view;
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PangoLayout *layout;
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view = gtk_source_gutter_renderer_get_view (GTK_SOURCE_GUTTER_RENDERER (renderer));
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layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
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if (markup != NULL)
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{
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pango_layout_set_markup (layout, markup, -1);
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}
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else
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{
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pango_layout_set_text (layout, text, -1);
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}
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pango_layout_get_pixel_size (layout, width, height);
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g_object_unref (layout);
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}
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/**
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* gtk_source_gutter_renderer_text_measure:
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* @renderer: a #GtkSourceGutterRendererText.
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* @text: the text to measure.
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* @width: (out) (optional): location to store the width of the text in pixels,
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* or %NULL.
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* @height: (out) (optional): location to store the height of the text in
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* pixels, or %NULL.
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*
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* Measures the text provided using the pango layout used by the
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* #GtkSourceGutterRendererText.
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*/
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void
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gtk_source_gutter_renderer_text_measure (GtkSourceGutterRendererText *renderer,
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const gchar *text,
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gint *width,
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gint *height)
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{
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g_return_if_fail (GTK_SOURCE_IS_GUTTER_RENDERER_TEXT (renderer));
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g_return_if_fail (text != NULL);
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measure_text (renderer, NULL, text, width, height);
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}
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/**
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* gtk_source_gutter_renderer_text_measure_markup:
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* @renderer: a #GtkSourceGutterRendererText.
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* @markup: the pango markup to measure.
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* @width: (out) (optional): location to store the width of the text in pixels,
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* or %NULL.
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* @height: (out) (optional): location to store the height of the text in
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* pixels, or %NULL.
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*
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* Measures the pango markup provided using the pango layout used by the
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* #GtkSourceGutterRendererText.
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*/
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void
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gtk_source_gutter_renderer_text_measure_markup (GtkSourceGutterRendererText *renderer,
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const gchar *markup,
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gint *width,
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gint *height)
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{
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g_return_if_fail (GTK_SOURCE_IS_GUTTER_RENDERER_TEXT (renderer));
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g_return_if_fail (markup != NULL);
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measure_text (renderer, markup, NULL, width, height);
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}
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static void
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gtk_source_gutter_renderer_text_finalize (GObject *object)
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{
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GtkSourceGutterRendererText *renderer = GTK_SOURCE_GUTTER_RENDERER_TEXT (object);
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g_free (renderer->priv->text);
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g_clear_object (&renderer->priv->cached_layout);
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G_OBJECT_CLASS (gtk_source_gutter_renderer_text_parent_class)->finalize (object);
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}
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static void
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set_text (GtkSourceGutterRendererText *renderer,
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const gchar *text,
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gint length,
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gboolean is_markup)
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{
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g_free (renderer->priv->text);
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renderer->priv->text = length >= 0 ? g_strndup (text, length) : g_strdup (text);
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renderer->priv->is_markup = is_markup;
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}
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static void
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gtk_source_gutter_renderer_text_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GtkSourceGutterRendererText *renderer;
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renderer = GTK_SOURCE_GUTTER_RENDERER_TEXT (object);
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switch (prop_id)
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{
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case PROP_MARKUP:
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set_text (renderer, g_value_get_string (value), -1, TRUE);
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break;
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case PROP_TEXT:
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set_text (renderer, g_value_get_string (value), -1, FALSE);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_source_gutter_renderer_text_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkSourceGutterRendererText *renderer;
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renderer = GTK_SOURCE_GUTTER_RENDERER_TEXT (object);
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switch (prop_id)
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{
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case PROP_MARKUP:
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g_value_set_string (value, renderer->priv->is_markup ? renderer->priv->text : NULL);
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break;
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case PROP_TEXT:
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g_value_set_string (value, !renderer->priv->is_markup ? renderer->priv->text : NULL);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_source_gutter_renderer_text_class_init (GtkSourceGutterRendererTextClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GtkSourceGutterRendererClass *renderer_class = GTK_SOURCE_GUTTER_RENDERER_CLASS (klass);
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object_class->finalize = gtk_source_gutter_renderer_text_finalize;
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object_class->get_property = gtk_source_gutter_renderer_text_get_property;
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object_class->set_property = gtk_source_gutter_renderer_text_set_property;
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renderer_class->begin = gutter_renderer_text_begin;
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renderer_class->draw = gutter_renderer_text_draw;
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renderer_class->end = gutter_renderer_text_end;
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g_object_class_install_property (object_class,
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PROP_MARKUP,
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g_param_spec_string ("markup",
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"Markup",
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"The markup",
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NULL,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
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g_object_class_install_property (object_class,
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PROP_TEXT,
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g_param_spec_string ("text",
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"Text",
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"The text",
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NULL,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
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}
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static void
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gtk_source_gutter_renderer_text_init (GtkSourceGutterRendererText *self)
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{
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self->priv = gtk_source_gutter_renderer_text_get_instance_private (self);
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self->priv->is_markup = TRUE;
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}
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/**
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* gtk_source_gutter_renderer_text_new:
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*
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* Create a new #GtkSourceGutterRendererText.
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*
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* Returns: (transfer full): A #GtkSourceGutterRenderer
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*
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**/
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GtkSourceGutterRenderer *
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gtk_source_gutter_renderer_text_new (void)
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{
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return g_object_new (GTK_SOURCE_TYPE_GUTTER_RENDERER_TEXT, NULL);
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}
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void
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gtk_source_gutter_renderer_text_set_markup (GtkSourceGutterRendererText *renderer,
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const gchar *markup,
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gint length)
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{
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g_return_if_fail (GTK_SOURCE_IS_GUTTER_RENDERER_TEXT (renderer));
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set_text (renderer, markup, length, TRUE);
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}
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void
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gtk_source_gutter_renderer_text_set_text (GtkSourceGutterRendererText *renderer,
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const gchar *text,
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gint length)
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{
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g_return_if_fail (GTK_SOURCE_IS_GUTTER_RENDERER_TEXT (renderer));
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set_text (renderer, text, length, FALSE);
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}
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