1/*
2 * Copyright (C) Research In Motion Limited 2010-2012. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB.  If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20#ifndef SVGTextMetrics_h
21#define SVGTextMetrics_h
22
23#include "platform/fonts/Glyph.h"
24#include "platform/text/TextDirection.h"
25#include "wtf/text/WTFString.h"
26
27namespace blink {
28
29class RenderSVGInlineText;
30class TextRun;
31
32class SVGTextMetrics {
33public:
34    enum MetricsType {
35        SkippedSpaceMetrics
36    };
37
38    SVGTextMetrics();
39    SVGTextMetrics(MetricsType);
40    SVGTextMetrics(RenderSVGInlineText*, unsigned position, unsigned length, float width, Glyph glyphNameGlyphId);
41
42    // FIXME: Migrate away from these to the two below.
43    static SVGTextMetrics measureCharacterRange(RenderSVGInlineText*, unsigned position, unsigned length);
44    static TextRun constructTextRun(RenderSVGInlineText*, unsigned position, unsigned length);
45
46    static SVGTextMetrics measureCharacterRange(RenderSVGInlineText*, unsigned position, unsigned length, TextDirection);
47    static TextRun constructTextRun(RenderSVGInlineText*, unsigned position, unsigned length, TextDirection);
48
49    bool isEmpty() const { return !m_width && !m_height && m_length <= 1; }
50
51    float width() const { return m_width; }
52    void setWidth(float width) { m_width = width; }
53
54    float height() const { return m_height; }
55    unsigned length() const { return m_length; }
56
57    // Only useful when measuring individual characters, to lookup ligatures.
58    Glyph glyph() const { return m_glyph; }
59
60private:
61    SVGTextMetrics(RenderSVGInlineText*, const TextRun&);
62
63    float m_width;
64    float m_height;
65    unsigned m_length;
66    Glyph m_glyph;
67};
68
69} // namespace blink
70
71#endif
72