1 /*
2 * Copyright (C) Research In Motion Limited 2010. 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 #include "config.h"
21
22 #if ENABLE(SVG)
23 #include "SVGTextChunk.h"
24
25 #include "SVGInlineTextBox.h"
26 #include "SVGTextFragment.h"
27
28 namespace WebCore {
29
SVGTextChunk(unsigned chunkStyle,float desiredTextLength)30 SVGTextChunk::SVGTextChunk(unsigned chunkStyle, float desiredTextLength)
31 : m_chunkStyle(chunkStyle)
32 , m_desiredTextLength(desiredTextLength)
33 {
34 }
35
calculateLength(float & length,unsigned & characters) const36 void SVGTextChunk::calculateLength(float& length, unsigned& characters) const
37 {
38 SVGTextFragment* lastFragment = 0;
39
40 unsigned boxCount = m_boxes.size();
41 for (unsigned boxPosition = 0; boxPosition < boxCount; ++boxPosition) {
42 SVGInlineTextBox* textBox = m_boxes.at(boxPosition);
43 Vector<SVGTextFragment>& fragments = textBox->textFragments();
44
45 unsigned size = fragments.size();
46 if (!size)
47 continue;
48
49 for (unsigned i = 0; i < size; ++i) {
50 SVGTextFragment& fragment = fragments.at(i);
51 characters += fragment.length;
52
53 if (m_chunkStyle & VerticalText)
54 length += fragment.height;
55 else
56 length += fragment.width;
57
58 if (!lastFragment) {
59 lastFragment = &fragment;
60 continue;
61 }
62
63 // Resepect gap between chunks.
64 if (m_chunkStyle & VerticalText)
65 length += fragment.y - (lastFragment->y + lastFragment->height);
66 else
67 length += fragment.x - (lastFragment->x + lastFragment->width);
68
69 lastFragment = &fragment;
70 }
71 }
72 }
73
calculateTextAnchorShift(float length) const74 float SVGTextChunk::calculateTextAnchorShift(float length) const
75 {
76 if (m_chunkStyle & MiddleAnchor)
77 return -length / 2;
78 if (m_chunkStyle & EndAnchor)
79 return m_chunkStyle & RightToLeftText ? 0 : -length;
80 return m_chunkStyle & RightToLeftText ? -length : 0;
81 }
82
83 } // namespace WebCore
84
85 #endif // ENABLE(SVG)
86