author | Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com> |
Mon, 30 Mar 2009 12:54:55 +0300 | |
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permissions | -rw-r--r-- |
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/* |
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* This file is part of the theme implementation for form controls in WebCore. |
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* |
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* Copyright (C) 2005 Apple Computer, Inc. |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public License |
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* along with this library; see the file COPYING.LIB. If not, write to |
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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* Boston, MA 02110-1301, USA. |
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* |
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*/ |
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#ifndef RenderTheme_h |
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#define RenderTheme_h |
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#include "RenderObject.h" |
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namespace WebCore { |
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class Element; |
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class PopupMenu; |
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class RenderMenuList; |
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enum ControlState { |
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HoverState, |
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PressedState, |
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FocusState, |
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EnabledState, |
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CheckedState, |
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ReadOnlyState |
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}; |
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class RenderTheme { |
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public: |
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RenderTheme() { } |
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virtual ~RenderTheme() { } |
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// This method is called whenever style has been computed for an element and the appearance |
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// property has been set to a value other than "none". The theme should map in all of the appropriate |
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// metrics and defaults given the contents of the style. This includes sophisticated operations like |
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// selection of control size based off the font, the disabling of appearance when certain other properties like |
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// "border" are set, or if the appearance is not supported by the theme. |
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void adjustStyle(CSSStyleSelector*, RenderStyle*, Element*, bool UAHasAppearance, |
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const BorderData&, const BackgroundLayer&, const Color& backgroundColor); |
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// This method is called to paint the widget as a background of the RenderObject. A widget's foreground, e.g., the |
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// text of a button, is always rendered by the engine itself. The boolean return value indicates |
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// whether the CSS border/background should also be painted. |
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bool paint(RenderObject*, const RenderObject::PaintInfo&, const IntRect&); |
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bool paintBorderOnly(RenderObject*, const RenderObject::PaintInfo&, const IntRect&); |
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bool paintDecorations(RenderObject*, const RenderObject::PaintInfo&, const IntRect&); |
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// The remaining methods should be implemented by the platform-specific portion of the theme, e.g., |
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// RenderThemeMac.cpp for Mac OS X. |
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// A method to obtain the baseline position for a "leaf" control. This will only be used if a baseline |
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// position cannot be determined by examining child content. Checkboxes and radio buttons are examples of |
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// controls that need to do this. |
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virtual short baselinePosition(const RenderObject*) const; |
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// A method for asking if a control is a container or not. Leaf controls have to have some special behavior (like |
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// the baseline position API above). |
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virtual bool isControlContainer(EAppearance) const; |
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// A method asking if the control changes its tint when the window has focus or not. |
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virtual bool controlSupportsTints(const RenderObject*) const { return false; } |
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// Whether or not the control has been styled enough by the author to disable the native appearance. |
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virtual bool isControlStyled(const RenderStyle*, const BorderData&, const BackgroundLayer&, const Color& backgroundColor) const; |
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// A general method asking if any control tinting is supported at all. |
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virtual bool supportsControlTints() const { return false; } |
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// Some controls may spill out of their containers (e.g., the check on an OS X checkbox). When these controls repaint, |
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// the theme needs to communicate this inflated rect to the engine so that it can invalidate the whole control. |
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virtual void adjustRepaintRect(const RenderObject*, IntRect&) { } |
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// This method is called whenever a relevant state changes on a particular themed object, e.g., the mouse becomes pressed |
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// or a control becomes disabled. |
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virtual bool stateChanged(RenderObject*, ControlState) const; |
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// This method is called whenever the theme changes on the system in order to flush cached resources from the |
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// old theme. |
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virtual void themeChanged() { } |
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// A method asking if the theme is able to draw the focus ring. |
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virtual bool supportsFocusRing(const RenderStyle*) const; |
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// A method asking if the theme's controls actually care about redrawing when hovered. |
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virtual bool supportsHover(const RenderStyle*) const { return false; } |
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// The selection color. |
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Color activeSelectionBackgroundColor() const; |
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Color inactiveSelectionBackgroundColor() const; |
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// The platform selection color. |
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virtual Color platformActiveSelectionBackgroundColor() const; |
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virtual Color platformInactiveSelectionBackgroundColor() const; |
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virtual Color platformActiveSelectionForegroundColor() const; |
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virtual Color platformInactiveSelectionForegroundColor() const; |
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// List Box selection color |
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virtual Color activeListBoxSelectionBackgroundColor() const; |
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virtual Color activeListBoxSelectionForegroundColor() const; |
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virtual Color inactiveListBoxSelectionBackgroundColor() const; |
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virtual Color inactiveListBoxSelectionForegroundColor() const; |
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void platformColorsDidChange(); |
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// System fonts. |
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virtual void systemFont(int propId, FontDescription&) const = 0; |
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virtual int minimumMenuListSize(RenderStyle*) const { return 0; } |
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virtual void adjustSliderThumbSize(RenderObject*) const; |
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// Methods for state querying |
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bool isChecked(const RenderObject*) const; |
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bool isIndeterminate(const RenderObject*) const; |
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bool isEnabled(const RenderObject*) const; |
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bool isFocused(const RenderObject*) const; |
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bool isPressed(const RenderObject*) const; |
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bool isHovered(const RenderObject*) const; |
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bool isReadOnlyControl(const RenderObject*) const; |
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virtual int popupInternalPaddingLeft(RenderStyle*) const { return 0; } |
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virtual int popupInternalPaddingRight(RenderStyle*) const { return 0; } |
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virtual int popupInternalPaddingTop(RenderStyle*) const { return 0; } |
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virtual int popupInternalPaddingBottom(RenderStyle*) const { return 0; } |
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protected: |
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// Methods for each appearance value. |
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virtual void adjustCheckboxStyle(CSSStyleSelector*, RenderStyle*, Element*) const; |
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virtual bool paintCheckbox(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } |
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virtual void setCheckboxSize(RenderStyle*) const { } |
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virtual void adjustRadioStyle(CSSStyleSelector*, RenderStyle*, Element*) const; |
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virtual bool paintRadio(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } |
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virtual void setRadioSize(RenderStyle*) const { } |
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virtual void adjustButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const; |
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virtual bool paintButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } |
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virtual void setButtonSize(RenderStyle*) const { } |
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virtual void adjustTextFieldStyle(CSSStyleSelector*, RenderStyle*, Element*) const; |
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virtual bool paintTextField(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } |
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virtual void adjustTextAreaStyle(CSSStyleSelector*, RenderStyle*, Element*) const; |
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virtual bool paintTextArea(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } |
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virtual void adjustMenuListStyle(CSSStyleSelector*, RenderStyle*, Element*) const; |
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virtual bool paintMenuList(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } |
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virtual void adjustMenuListButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const; |
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virtual bool paintMenuListButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } |
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virtual void adjustSliderTrackStyle(CSSStyleSelector*, RenderStyle*, Element*) const; |
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virtual bool paintSliderTrack(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } |
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virtual void adjustSliderThumbStyle(CSSStyleSelector*, RenderStyle*, Element*) const; |
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virtual bool paintSliderThumb(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } |
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virtual void adjustSearchFieldStyle(CSSStyleSelector*, RenderStyle*, Element*) const; |
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virtual bool paintSearchField(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } |
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virtual void adjustSearchFieldCancelButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const; |
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virtual bool paintSearchFieldCancelButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } |
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virtual void adjustSearchFieldDecorationStyle(CSSStyleSelector*, RenderStyle*, Element*) const; |
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virtual bool paintSearchFieldDecoration(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } |
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virtual void adjustSearchFieldResultsDecorationStyle(CSSStyleSelector*, RenderStyle*, Element*) const; |
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virtual bool paintSearchFieldResultsDecoration(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } |
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virtual void adjustSearchFieldResultsButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const; |
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virtual bool paintSearchFieldResultsButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } |
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private: |
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mutable Color m_activeSelectionColor; |
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mutable Color m_inactiveSelectionColor; |
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}; |
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// Function to obtain the theme. This is implemented in your platform-specific theme implementation to hand |
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// back the appropriate platform theme. |
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RenderTheme* theme(); |
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} // namespace WebCore |
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#endif // RenderTheme_h |