forked from AuroraMiddleware/gtk
9926e6ebde
This adds a GtkTextLineDisplayCache which can be used to cache a number of GtkTextLineDisplay (and thus, PangoLayout) while displaying a view. It uses a GSequence to track the position of the GtkTextLineDisplay relative to each other, a MRU to cull the least recently used display, and and a direct hashtable to lookup display by GtkTextLine. We only cache lines that are to be displayed (!size_only). We may want to either create a second collection of "size_only" lines to speed that up, or determine that it is unnecessary (which is likely the case).
60 lines
3.9 KiB
C
60 lines
3.9 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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* Copyright (C) 2019 Red Hat, Inc.
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*
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* This library 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 of the License, or (at your option) any later version.
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*
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* This library 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, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __GTK_TEXT_LINE_DISPLAY_CACHE_PRIVATE_H__
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#define __GTK_TEXT_LINE_DISPLAY_CACHE_PRIVATE_H__
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#include "gtktextlayoutprivate.h"
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G_BEGIN_DECLS
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typedef struct _GtkTextLineDisplayCache GtkTextLineDisplayCache;
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GtkTextLineDisplayCache *gtk_text_line_display_cache_new (void);
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void gtk_text_line_display_cache_free (GtkTextLineDisplayCache *cache);
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GtkTextLineDisplay *gtk_text_line_display_cache_get (GtkTextLineDisplayCache *cache,
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GtkTextLayout *layout,
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GtkTextLine *line,
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gboolean size_only);
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void gtk_text_line_display_cache_delay_eviction (GtkTextLineDisplayCache *cache);
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void gtk_text_line_display_cache_set_cursor_line (GtkTextLineDisplayCache *cache,
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GtkTextLine *line);
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void gtk_text_line_display_cache_invalidate (GtkTextLineDisplayCache *cache);
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void gtk_text_line_display_cache_invalidate_cursors (GtkTextLineDisplayCache *cache,
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GtkTextLine *line);
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void gtk_text_line_display_cache_invalidate_display (GtkTextLineDisplayCache *cache,
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GtkTextLineDisplay *display,
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gboolean cursors_only);
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void gtk_text_line_display_cache_invalidate_line (GtkTextLineDisplayCache *cache,
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GtkTextLine *line);
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void gtk_text_line_display_cache_invalidate_range (GtkTextLineDisplayCache *cache,
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GtkTextLayout *layout,
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const GtkTextIter *begin,
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const GtkTextIter *end,
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gboolean cursors_only);
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void gtk_text_line_display_cache_invalidate_y_range (GtkTextLineDisplayCache *cache,
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GtkTextLayout *layout,
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gint y,
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gint height,
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gboolean cursors_only);
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G_END_DECLS
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#endif /* __GTK_TEXT_LINE_DISPLAY_CACHE_PRIVATE_H__ */
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