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35fc31a1de
Update libraries to latest stable released version (except gnomecanvasmm, which is strangely packaged...). Fixes building (at least here). git-svn-id: svn://localhost/ardour2/trunk@2790 d708f5d6-7413-0410-9779-e7cbd77b26cf
131 lines
6.2 KiB
Text
131 lines
6.2 KiB
Text
/* $Id: glyphstring.hg,v 1.2 2006/05/30 17:14:21 murrayc Exp $ */
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/* glyphstring.h
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*
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* Copyright (C) 1998-1999 The gtkmm Development Team
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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 Library 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <pangomm/font.h>
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#include <pangomm/glyph.h>
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#include <pangomm/item.h>
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#include <cairomm/context.h>
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#include <pango/pango-glyph.h>
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#include <pango/pango-item.h> //For PangoAnalysis.
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_DEFS(pangomm,pango)
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namespace Pango
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{
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/** A Pango::GlyphString is used to store strings of glyphs with geometry and visual attribute information.
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* It can be measured or drawn to the screen.
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*/
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class GlyphString
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{
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_CLASS_BOXEDTYPE(GlyphString, PangoGlyphString, pango_glyph_string_new, pango_glyph_string_copy, pango_glyph_string_free)
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_IGNORE(pango_glyph_string_free, pango_glyph_string_copy, pango_glyph_string_copy_static, pango_glyph_string_equal)
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_IGNORE(pango_glyph_string_index_to_x, pango_glyph_string_x_to_index, pango_glyph_string_get_logical_widths)
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public:
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/** Construct a string of glyphs from a string of characters.
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* Given a segment of text and the corresponding Pango::Analysis structure
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* returned from Pango::Context::itemize(), convert the characters into glyphs.
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* You may also pass in only a sub-string of the item.
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* @param text The text to process. You must pass the same string into those member functions expecting a const Glib::ustring&.
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* @param analysis The analysis information return from Pango::Context::itemize().
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*/
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GlyphString(const Glib::ustring& text, const Analysis& analysis);
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_WRAP_METHOD(void set_size (int new_len), pango_glyph_string_set_size)
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_WRAP_METHOD(void get_extents(const Glib::RefPtr<const Font>& font, Rectangle& ink_rect, Rectangle& logical_rect) const, pango_glyph_string_extents)
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_WRAP_METHOD(void get_extents(int start, int end, const Glib::RefPtr<const Font>& font, Rectangle& ink_rect, Rectangle& logical_rect) const, pango_glyph_string_extents_range)
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_WRAP_METHOD(int get_width() const, pango_glyph_string_get_width)
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/** Computes the extents of the glyph string as drawn.
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* @param font A Pango::Font.
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* @return The extents of the glyph string as drawn.
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*/
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Rectangle get_ink_extents(const Glib::RefPtr<const Font>& font) const;
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/** Computes the extents of a sub-portion of the glyph string as drawn.
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* @param start The start index.
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* @param end The end index.
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* @param font A Panog::Font
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* @return The extents of the sub-portion of the glyph string as drawn.
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*/
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Rectangle get_ink_extents(int start, int end, const Glib::RefPtr<const Font>& font) const;
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/** Computes the logical extents of a sub-portion of the glyph string.
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* @param font A Pango::Font.
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* @return The logical extents of the glyph string.
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*/
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Rectangle get_logical_extents(const Glib::RefPtr<const Font>& font) const;
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/** Computes the logical extents of a sub-portion of the glyph string.
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* @param start The start index.
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* @param end The end index.
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* @param font A Pango::Font.
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* @return The logical extents of the sub-portion of the glyph string.
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*/
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Rectangle get_logical_extents(int start, int end, const Glib::RefPtr<const Font>& font) const;
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/** Determine the screen width corresponding to each character.
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* When multiple characters compose a single cluster, the width of the entire cluster
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* is divided equally among the characters.
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* @param text The text corresponding to the glyphs.
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* @param embedding_level The embedding level of the string.
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* @return An array of integers representing the resulting character widths.
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*/
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Glib::ArrayHandle<int> get_logical_widths(const Glib::ustring& text, int embedding_level) const;
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/** Converts from character position to x position.
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* (X position is measured from the left edge of the run). Character positions are computed by dividing up each cluster into equal portions.
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* @param text The text corresponding to the glyphs.
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* @param analysis The analysis information return from Pango::Context::itemize().
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* @param index The byte index within text.
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* @param trailing Whether we should compute the result for the beginning or end of the character.
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* @return The x position.
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*/
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int index_to_x(const Glib::ustring& text, const Analysis& analysis, int index, bool trailing) const;
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/** Convert from x offset to character position.
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* Character positions are computed by dividing up each cluster into equal portions.
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* In scripts where positioning within a cluster is not allowed (such as Thai),
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* the returned value may not be a valid cursor position; the caller must combine the
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* result with the logical attributes for the text to compute the valid cursor position.
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* @param text The text corresponding to the glyphs.
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* @param analysis The analysis information return from Pango::Context::itemize().
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* @param x_pos The x offset (in thousands of a device unit).
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* @param index The location to store calculated byte index within.
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* @param trailing The location to store a boolean indicating whether the user clicked on the leading or trailing edge of the character.
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*/
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void x_to_index(const Glib::ustring& text, const Analysis& analysis, int x_pos, int& index, bool& trailing) const;
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/** Gharacter positions are computed by dividing up each cluster into equal portions.
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* @return An array of Pango::GlyphInfo objects.
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*/
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Glib::ArrayHandle<GlyphInfo> get_glyphs() const;
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//TODO:
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//void pango_cairo_glyph_string_path (cairo_t *cr,
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// PangoFont *font,
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// PangoGlyphString *glyphs);
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};
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} //namespace Pango
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