1 /* 2 * Copyright (C) 2005 Apple Computer 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 #ifndef RenderButton_h 22 #define RenderButton_h 23 24 #include "HTMLNames.h" 25 #include "core/rendering/RenderFlexibleBox.h" 26 27 namespace WebCore { 28 29 class RenderTextFragment; 30 31 // RenderButtons are just like normal flexboxes except that they will generate an anonymous block child. 32 // For inputs, they will also generate an anonymous RenderText and keep its style and content up 33 // to date as the button changes. 34 class RenderButton FINAL : public RenderFlexibleBox { 35 public: 36 explicit RenderButton(Element*); 37 virtual ~RenderButton(); 38 39 virtual const char* renderName() const { return "RenderButton"; } 40 virtual bool isRenderButton() const { return true; } 41 42 virtual bool canBeSelectionLeaf() const OVERRIDE { return node() && node()->rendererIsEditable(); } 43 44 virtual void addChild(RenderObject* newChild, RenderObject *beforeChild = 0); 45 virtual void removeChild(RenderObject*); 46 virtual void removeLeftoverAnonymousBlock(RenderBlock*) { } 47 virtual bool createsAnonymousWrapper() const { return true; } 48 49 void setupInnerStyle(RenderStyle*); 50 51 // <button> should allow whitespace even though RenderFlexibleBox doesn't. 52 virtual bool canHaveWhitespaceChildren() const OVERRIDE { return true; } 53 54 virtual bool canHaveGeneratedChildren() const OVERRIDE; 55 virtual bool hasControlClip() const { return true; } 56 virtual LayoutRect controlClipRect(const LayoutPoint&) const; 57 58 virtual int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode) const OVERRIDE; 59 60 private: 61 virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle); 62 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle); 63 64 virtual bool hasLineIfEmpty() const { return node() && node()->hasTagName(HTMLNames::inputTag); } 65 66 virtual bool requiresForcedStyleRecalcPropagation() const { return true; } 67 68 RenderBlock* m_inner; 69 }; 70 71 inline RenderButton* toRenderButton(RenderObject* object) 72 { 73 ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderButton()); 74 return static_cast<RenderButton*>(object); 75 } 76 77 inline const RenderButton* toRenderButton(const RenderObject* object) 78 { 79 ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderButton()); 80 return static_cast<const RenderButton*>(object); 81 } 82 83 // This will catch anyone doing an unnecessary cast. 84 void toRenderButton(const RenderButton*); 85 86 } // namespace WebCore 87 88 #endif // RenderButton_h 89
