1/* 2 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved. 3 * (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public License 16 * along with this library; see the file COPYING.LIB. If not, write to 17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 * 20 */ 21 22#ifndef RenderTextControl_h 23#define RenderTextControl_h 24 25#include "core/rendering/RenderBlockFlow.h" 26#include "core/rendering/RenderFlexibleBox.h" 27 28namespace blink { 29 30class HTMLTextFormControlElement; 31 32class RenderTextControl : public RenderBlockFlow { 33public: 34 virtual ~RenderTextControl(); 35 36 HTMLTextFormControlElement* textFormControlElement() const; 37 virtual PassRefPtr<RenderStyle> createInnerEditorStyle(const RenderStyle* startStyle) const = 0; 38 39protected: 40 RenderTextControl(HTMLTextFormControlElement*); 41 42 // This convenience function should not be made public because 43 // innerEditorElement may outlive the render tree. 44 HTMLElement* innerEditorElement() const; 45 46 int scrollbarThickness() const; 47 void adjustInnerEditorStyle(RenderStyle* textBlockStyle) const; 48 49 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE; 50 51 void hitInnerEditorElement(HitTestResult&, const LayoutPoint& pointInContainer, const LayoutPoint& accumulatedOffset); 52 53 int textBlockLogicalWidth() const; 54 int textBlockLogicalHeight() const; 55 56 float scaleEmToUnits(int x) const; 57 58 static bool hasValidAvgCharWidth(AtomicString family); 59 virtual float getAvgCharWidth(AtomicString family); 60 virtual LayoutUnit preferredContentLogicalWidth(float charWidth) const = 0; 61 virtual LayoutUnit computeControlLogicalHeight(LayoutUnit lineHeight, LayoutUnit nonContentHeight) const = 0; 62 63 virtual void updateFromElement() OVERRIDE; 64 virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const OVERRIDE; 65 virtual RenderObject* layoutSpecialExcludedChild(bool relayoutChildren, SubtreeLayoutScope&) OVERRIDE; 66 67 // We need to override this function because we don't want overflow:hidden on an <input> 68 // to affect the baseline calculation. This is necessary because we are an inline-block 69 // element as an implementation detail which would normally be affected by this. 70 virtual int inlineBlockBaseline(LineDirectionMode direction) const OVERRIDE { return lastLineBoxBaseline(direction); } 71 72private: 73 virtual const char* renderName() const OVERRIDE { return "RenderTextControl"; } 74 virtual bool isTextControl() const OVERRIDE FINAL { return true; } 75 virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const OVERRIDE FINAL; 76 virtual void computePreferredLogicalWidths() OVERRIDE FINAL; 77 virtual void removeLeftoverAnonymousBlock(RenderBlock*) OVERRIDE FINAL { } 78 virtual bool avoidsFloats() const OVERRIDE FINAL { return true; } 79 virtual bool canHaveGeneratedChildren() const OVERRIDE FINAL { return false; } 80 81 virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0) OVERRIDE FINAL; 82 83 virtual void addFocusRingRects(Vector<LayoutRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer) const OVERRIDE FINAL; 84 85 virtual bool canBeProgramaticallyScrolled() const OVERRIDE FINAL { return true; } 86}; 87 88DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderTextControl, isTextControl()); 89 90// Renderer for our inner container, for <search> and others. 91// We can't use RenderFlexibleBox directly, because flexboxes have a different 92// baseline definition, and then inputs of different types wouldn't line up 93// anymore. 94class RenderTextControlInnerContainer FINAL : public RenderFlexibleBox { 95public: 96 explicit RenderTextControlInnerContainer(Element* element) 97 : RenderFlexibleBox(element) 98 { } 99 virtual ~RenderTextControlInnerContainer() { } 100 101 virtual int baselinePosition(FontBaseline baseline, bool firstLine, LineDirectionMode direction, LinePositionMode position) const OVERRIDE 102 { 103 return RenderBlock::baselinePosition(baseline, firstLine, direction, position); 104 } 105 virtual int firstLineBoxBaseline() const OVERRIDE { return RenderBlock::firstLineBoxBaseline(); } 106 virtual int inlineBlockBaseline(LineDirectionMode direction) const OVERRIDE { return lastLineBoxBaseline(direction); } 107}; 108 109 110} // namespace blink 111 112#endif // RenderTextControl_h 113