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 "RenderBlockFlow.h"
26#include "RenderFlexibleBox.h"
27
28namespace WebCore {
29
30class TextControlInnerTextElement;
31class HTMLTextFormControlElement;
32
33class RenderTextControl : public RenderBlockFlow {
34public:
35    virtual ~RenderTextControl();
36
37    HTMLTextFormControlElement& textFormControlElement() const;
38    virtual PassRef<RenderStyle> createInnerTextStyle(const RenderStyle* startStyle) const = 0;
39
40#if PLATFORM(IOS)
41    bool canScroll() const;
42
43    // Returns the line height of the inner renderer.
44    virtual int innerLineHeight() const override;
45#endif
46
47protected:
48    RenderTextControl(HTMLTextFormControlElement&, PassRef<RenderStyle>);
49
50    // This convenience function should not be made public because innerTextElement may outlive the render tree.
51    TextControlInnerTextElement* innerTextElement() const;
52
53    int scrollbarThickness() const;
54    void adjustInnerTextStyle(const RenderStyle* startStyle, RenderStyle* textBlockStyle) const;
55
56    virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
57
58    void hitInnerTextElement(HitTestResult&, const LayoutPoint& pointInContainer, const LayoutPoint& accumulatedOffset);
59
60    int textBlockLogicalWidth() const;
61    int textBlockLogicalHeight() const;
62
63    float scaleEmToUnits(int x) const;
64
65    virtual float getAverageCharWidth();
66    virtual LayoutUnit preferredContentLogicalWidth(float charWidth) const = 0;
67    virtual LayoutUnit computeControlLogicalHeight(LayoutUnit lineHeight, LayoutUnit nonContentHeight) const = 0;
68
69    virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const override;
70    virtual RenderObject* layoutSpecialExcludedChild(bool relayoutChildren) override;
71
72private:
73    void element() const = delete;
74
75    virtual const char* renderName() const override { return "RenderTextControl"; }
76    virtual bool isTextControl() const override final { return true; }
77    virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const override;
78    virtual void computePreferredLogicalWidths() override;
79    virtual void removeLeftoverAnonymousBlock(RenderBlock*) override { }
80    virtual bool avoidsFloats() const override { return true; }
81    virtual bool canHaveGeneratedChildren() const override { return false; }
82
83    virtual void addFocusRingRects(Vector<IntRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer = 0) override;
84
85    virtual bool canBeProgramaticallyScrolled() const override { return true; }
86
87    virtual bool requiresForcedStyleRecalcPropagation() const override { return true; }
88};
89
90RENDER_OBJECT_TYPE_CASTS(RenderTextControl, isTextControl())
91
92// Renderer for our inner container, for <search> and others.
93// We can't use RenderFlexibleBox directly, because flexboxes have a different
94// baseline definition, and then inputs of different types wouldn't line up
95// anymore.
96class RenderTextControlInnerContainer final : public RenderFlexibleBox {
97public:
98    explicit RenderTextControlInnerContainer(Element& element, PassRef<RenderStyle> style)
99        : RenderFlexibleBox(element, WTF::move(style))
100    { }
101    virtual ~RenderTextControlInnerContainer() { }
102
103    virtual int baselinePosition(FontBaseline baseline, bool firstLine, LineDirectionMode direction, LinePositionMode position) const override
104    {
105        return RenderBlock::baselinePosition(baseline, firstLine, direction, position);
106    }
107    virtual int firstLineBaseline() const override { return RenderBlock::firstLineBaseline(); }
108    virtual int inlineBlockBaseline(LineDirectionMode direction) const override { return RenderBlock::inlineBlockBaseline(direction); }
109
110};
111
112
113} // namespace WebCore
114
115#endif // RenderTextControl_h
116