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 #include "core/rendering/svg/SVGTextChunk.h"
23
24 #include "core/rendering/svg/SVGInlineTextBox.h"
25 #include "core/rendering/svg/SVGTextFragment.h"
26
27 namespace WebCore {
28
SVGTextChunk(unsigned chunkStyle,float desiredTextLength)29 SVGTextChunk::SVGTextChunk(unsigned chunkStyle, float desiredTextLength)
30 : m_chunkStyle(chunkStyle)
31 , m_desiredTextLength(desiredTextLength)
32 {
33 }
34
calculateLength(float & length,unsigned & characters) const35 void SVGTextChunk::calculateLength(float& length, unsigned& characters) const
36 {
37 SVGTextFragment* lastFragment = 0;
38
39 unsigned boxCount = m_boxes.size();
40 for (unsigned boxPosition = 0; boxPosition < boxCount; ++boxPosition) {
41 SVGInlineTextBox* textBox = m_boxes.at(boxPosition);
42 Vector<SVGTextFragment>& fragments = textBox->textFragments();
43
44 unsigned size = fragments.size();
45 if (!size)
46 continue;
47
48 for (unsigned i = 0; i < size; ++i) {
49 SVGTextFragment& fragment = fragments.at(i);
50 characters += fragment.length;
51
52 if (m_chunkStyle & VerticalText)
53 length += fragment.height;
54 else
55 length += fragment.width;
56
57 if (!lastFragment) {
58 lastFragment = &fragment;
59 continue;
60 }
61
62 // Resepect gap between chunks.
63 if (m_chunkStyle & VerticalText)
64 length += fragment.y - (lastFragment->y + lastFragment->height);
65 else
66 length += fragment.x - (lastFragment->x + lastFragment->width);
67
68 lastFragment = &fragment;
69 }
70 }
71 }
72
calculateTextAnchorShift(float length) const73 float SVGTextChunk::calculateTextAnchorShift(float length) const
74 {
75 if (m_chunkStyle & MiddleAnchor)
76 return -length / 2;
77 if (m_chunkStyle & EndAnchor)
78 return m_chunkStyle & RightToLeftText ? 0 : -length;
79 return m_chunkStyle & RightToLeftText ? -length : 0;
80 }
81
82 } // namespace WebCore
83