15c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)/* 25c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Copyright (C) Research In Motion Limited 2010-2012. All rights reserved. 35c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 45c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * This library is free software; you can redistribute it and/or 55c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * modify it under the terms of the GNU Library General Public 65c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * License as published by the Free Software Foundation; either 75c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * version 2 of the License, or (at your option) any later version. 85c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 95c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * This library is distributed in the hope that it will be useful, 105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * but WITHOUT ANY WARRANTY; without even the implied warranty of 115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 125c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Library General Public License for more details. 135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 145c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * You should have received a copy of the GNU Library General Public License 155c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * along with this library; see the file COPYING.LIB. If not, write to 165c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 175c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Boston, MA 02110-1301, USA. 185c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) */ 195c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 205c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#ifndef SVGTextLayoutAttributesBuilder_h 215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#define SVGTextLayoutAttributesBuilder_h 225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 23d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#include "core/rendering/svg/SVGTextLayoutAttributes.h" 2402772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch#include "wtf/Vector.h" 255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 26c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)namespace blink { 275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 285c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)class RenderObject; 295c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)class RenderSVGInlineText; 305c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)class RenderSVGText; 315c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)class SVGTextPositioningElement; 325c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 335c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// SVGTextLayoutAttributesBuilder performs the first layout phase for SVG text. 345c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// 355c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// It extracts the x/y/dx/dy/rotate values from the SVGTextPositioningElements in the DOM. 365c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// These values are propagated to the corresponding RenderSVGInlineText renderers. 375c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// The first layout phase only extracts the relevant information needed in RenderBlockLineLayout 385c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// to create the InlineBox tree based on text chunk boundaries & BiDi information. 395c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// The second layout phase is carried out by SVGTextLayoutEngine. 405c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)class SVGTextLayoutAttributesBuilder { 425c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) WTF_MAKE_NONCOPYABLE(SVGTextLayoutAttributesBuilder); 435c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)public: 445c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) SVGTextLayoutAttributesBuilder(); 455c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) bool buildLayoutAttributesForForSubtree(RenderSVGText*); 465c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) void buildLayoutAttributesForTextRenderer(RenderSVGInlineText*); 475c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 485c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) void rebuildMetricsForTextRenderer(RenderSVGInlineText*); 495c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 505c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // Invoked whenever the underlying DOM tree changes, so that m_textPositions is rebuild. 515c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) void clearTextPositioningElements() { m_textPositions.clear(); } 525c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) unsigned numberOfTextPositioningElements() const { return m_textPositions.size(); } 535c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 545c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)private: 555c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) struct TextPosition { 565c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) TextPosition(SVGTextPositioningElement* newElement = 0, unsigned newStart = 0, unsigned newLength = 0) 575c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) : element(newElement) 585c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) , start(newStart) 595c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) , length(newLength) 605c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) { 615c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 625c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 635c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) SVGTextPositioningElement* element; 645c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) unsigned start; 655c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) unsigned length; 665c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) }; 675c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 685c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) void buildCharacterDataMap(RenderSVGText*); 697757ec2eadfa2dd8ac2aeed0a4399e9b07ec38cbBen Murdoch void collectTextPositioningElements(RenderObject*, UChar& lastCharacter); 705c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) void fillCharacterDataMap(const TextPosition&); 715c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 725c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)private: 735c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) unsigned m_textLength; 745c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) Vector<TextPosition> m_textPositions; 755c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) SVGCharacterDataMap m_characterDataMap; 765c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)}; 775c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 78c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)} // namespace blink 795c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 805c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#endif 81