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| 1 /* | |
| 2 * Copyright (C) 2011 Apple Inc. 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 | |
| 21 #include "config.h" | |
| 22 #include "core/rendering/RenderCombineText.h" | |
| 23 | |
| 24 #include "core/rendering/TextRunConstructor.h" | |
| 25 | |
| 26 namespace blink { | |
| 27 | |
| 28 RenderCombineText::RenderCombineText(Node* node, PassRefPtr<StringImpl> string) | |
| 29 : RenderText(node, string) | |
| 30 , m_combinedTextWidth(0) | |
| 31 , m_isCombined(false) | |
| 32 , m_needsFontUpdate(false) | |
| 33 { | |
| 34 } | |
| 35 | |
| 36 void RenderCombineText::styleDidChange(StyleDifference diff, const RenderStyle*
oldStyle) | |
| 37 { | |
| 38 setStyleInternal(RenderStyle::clone(style())); | |
| 39 RenderText::styleDidChange(diff, oldStyle); | |
| 40 | |
| 41 if (m_isCombined) { | |
| 42 RenderText::setTextInternal(originalText()); // This RenderCombineText h
as been combined once. Restore the original text for the next combineText(). | |
| 43 m_isCombined = false; | |
| 44 } | |
| 45 | |
| 46 m_needsFontUpdate = true; | |
| 47 } | |
| 48 | |
| 49 void RenderCombineText::setTextInternal(PassRefPtr<StringImpl> text) | |
| 50 { | |
| 51 RenderText::setTextInternal(text); | |
| 52 | |
| 53 m_needsFontUpdate = true; | |
| 54 } | |
| 55 | |
| 56 float RenderCombineText::width(unsigned from, unsigned length, const Font& font,
float xPosition, TextDirection direction, HashSet<const SimpleFontData*>* fallb
ackFonts, GlyphOverflow* glyphOverflow) const | |
| 57 { | |
| 58 if (!length) | |
| 59 return 0; | |
| 60 | |
| 61 if (hasEmptyText()) | |
| 62 return 0; | |
| 63 | |
| 64 if (m_isCombined) | |
| 65 return font.fontDescription().computedSize(); | |
| 66 | |
| 67 return RenderText::width(from, length, font, xPosition, direction, fallbackF
onts, glyphOverflow); | |
| 68 } | |
| 69 | |
| 70 void RenderCombineText::adjustTextOrigin(FloatPoint& textOrigin, const FloatRect
& boxRect) const | |
| 71 { | |
| 72 if (m_isCombined) | |
| 73 textOrigin.move(boxRect.height() / 2 - ceilf(m_combinedTextWidth) / 2, s
tyle()->font().fontDescription().computedPixelSize()); | |
| 74 } | |
| 75 | |
| 76 void RenderCombineText::getStringToRender(int start, StringView& string, int& le
ngth) const | |
| 77 { | |
| 78 ASSERT(start >= 0); | |
| 79 if (m_isCombined) { | |
| 80 string = StringView(m_renderingText.impl()); | |
| 81 length = string.length(); | |
| 82 return; | |
| 83 } | |
| 84 | |
| 85 string = text().createView(start, length); | |
| 86 } | |
| 87 | |
| 88 void RenderCombineText::combineText() | |
| 89 { | |
| 90 if (!m_needsFontUpdate) | |
| 91 return; | |
| 92 | |
| 93 m_isCombined = false; | |
| 94 m_needsFontUpdate = false; | |
| 95 | |
| 96 // CSS3 spec says text-combine works only in vertical writing mode. | |
| 97 // FIXME(sky): Remove | |
| 98 } | |
| 99 | |
| 100 } // namespace blink | |
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