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Diffstat (limited to 'webkit/pending/RenderTheme.h')
| -rw-r--r-- | webkit/pending/RenderTheme.h | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/webkit/pending/RenderTheme.h b/webkit/pending/RenderTheme.h new file mode 100644 index 0000000..a2fa605 --- /dev/null +++ b/webkit/pending/RenderTheme.h @@ -0,0 +1,216 @@ +/* + * This file is part of the theme implementation for form controls in WebCore. + * + * Copyright (C) 2005, 2006, 2007, 2008 Apple Computer, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public License + * along with this library; see the file COPYING.LIB. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + * + */ + +#ifndef RenderTheme_h +#define RenderTheme_h + +#include "RenderObject.h" + +namespace WebCore { + +class Element; +class PopupMenu; +class RenderMenuList; + +enum ControlState { + HoverState, + PressedState, + FocusState, + EnabledState, + CheckedState, + ReadOnlyState +}; + +class RenderTheme { +public: + RenderTheme() { } + virtual ~RenderTheme() { } + + // This method is called whenever style has been computed for an element and the appearance + // property has been set to a value other than "none". The theme should map in all of the appropriate + // metrics and defaults given the contents of the style. This includes sophisticated operations like + // selection of control size based off the font, the disabling of appearance when certain other properties like + // "border" are set, or if the appearance is not supported by the theme. + void adjustStyle(CSSStyleSelector*, RenderStyle*, Element*, bool UAHasAppearance, + const BorderData&, const BackgroundLayer&, const Color& backgroundColor); + + // This method is called to paint the widget as a background of the RenderObject. A widget's foreground, e.g., the + // text of a button, is always rendered by the engine itself. The boolean return value indicates + // whether the CSS border/background should also be painted. + bool paint(RenderObject*, const RenderObject::PaintInfo&, const IntRect&); + bool paintBorderOnly(RenderObject*, const RenderObject::PaintInfo&, const IntRect&); + bool paintDecorations(RenderObject*, const RenderObject::PaintInfo&, const IntRect&); + + // The remaining methods should be implemented by the platform-specific portion of the theme, e.g., + // RenderThemeMac.cpp for Mac OS X. + + // A method to obtain the baseline position for a "leaf" control. This will only be used if a baseline + // position cannot be determined by examining child content. Checkboxes and radio buttons are examples of + // controls that need to do this. + virtual short baselinePosition(const RenderObject*) const; + + // A method for asking if a control is a container or not. Leaf controls have to have some special behavior (like + // the baseline position API above). + virtual bool isControlContainer(EAppearance) const; + + // A method asking if the control changes its tint when the window has focus or not. + virtual bool controlSupportsTints(const RenderObject*) const { return false; } + + // Whether or not the control has been styled enough by the author to disable the native appearance. + virtual bool isControlStyled(const RenderStyle*, const BorderData&, const BackgroundLayer&, const Color& backgroundColor) const; + + // A general method asking if any control tinting is supported at all. + virtual bool supportsControlTints() const { return false; } + + // Some controls may spill out of their containers (e.g., the check on an OS X checkbox). When these controls repaint, + // the theme needs to communicate this inflated rect to the engine so that it can invalidate the whole control. + virtual void adjustRepaintRect(const RenderObject*, IntRect&) { } + + // This method is called whenever a relevant state changes on a particular themed object, e.g., the mouse becomes pressed + // or a control becomes disabled. + virtual bool stateChanged(RenderObject*, ControlState) const; + + // This method is called whenever the theme changes on the system in order to flush cached resources from the + // old theme. + virtual void themeChanged() { } + + // A method asking if the theme is able to draw the focus ring. + virtual bool supportsFocusRing(const RenderStyle*) const; + + // A method asking if the theme's controls actually care about redrawing when hovered. + virtual bool supportsHover(const RenderStyle*) const { return false; } + + // The selection color. + Color activeSelectionBackgroundColor() const; + Color inactiveSelectionBackgroundColor() const; + + virtual Color platformTextSearchHighlightColor() const; + + // The platform selection color. + virtual Color platformActiveSelectionBackgroundColor() const; + virtual Color platformInactiveSelectionBackgroundColor() const; + virtual Color platformActiveSelectionForegroundColor() const; + virtual Color platformInactiveSelectionForegroundColor() const; + + // List Box selection color + virtual Color activeListBoxSelectionBackgroundColor() const; + virtual Color activeListBoxSelectionForegroundColor() const; + virtual Color inactiveListBoxSelectionBackgroundColor() const; + virtual Color inactiveListBoxSelectionForegroundColor() const; + + void platformColorsDidChange(); + + virtual double caretBlinkFrequency() const { return 0.5; } + + // System fonts. + virtual void systemFont(int cssValueId, Document*, FontDescription&) const = 0; + + virtual int minimumMenuListSize(RenderStyle*) const { return 0; } + + virtual void adjustButtonInnerStyle(RenderStyle* style) const { } + virtual void adjustSliderThumbSize(RenderObject*) const; + + // Methods for state querying + bool isActive(const RenderObject*) const; + bool isChecked(const RenderObject*) const; + bool isIndeterminate(const RenderObject*) const; + bool isEnabled(const RenderObject*) const; + bool isFocused(const RenderObject*) const; + bool isPressed(const RenderObject*) const; + bool isHovered(const RenderObject*) const; + bool isReadOnlyControl(const RenderObject*) const; + + virtual int popupInternalPaddingLeft(RenderStyle*) const { return 0; } + virtual int popupInternalPaddingRight(RenderStyle*) const { return 0; } + virtual int popupInternalPaddingTop(RenderStyle*) const { return 0; } + virtual int popupInternalPaddingBottom(RenderStyle*) const { return 0; } + + // Method for painting the caps lock indicator + virtual bool paintCapsLockIndicator(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return 0; }; + +protected: + // Methods for each appearance value. + virtual void adjustCheckboxStyle(CSSStyleSelector*, RenderStyle*, Element*) const; + virtual bool paintCheckbox(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + virtual void setCheckboxSize(RenderStyle*) const { } + + virtual void adjustRadioStyle(CSSStyleSelector*, RenderStyle*, Element*) const; + virtual bool paintRadio(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + virtual void setRadioSize(RenderStyle*) const { } + + virtual void adjustButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const; + virtual bool paintButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + virtual void setButtonSize(RenderStyle*) const { } + + virtual void adjustTextFieldStyle(CSSStyleSelector*, RenderStyle*, Element*) const; + virtual bool paintTextField(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + + virtual void adjustTextAreaStyle(CSSStyleSelector*, RenderStyle*, Element*) const; + virtual bool paintTextArea(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + + virtual void adjustMenuListStyle(CSSStyleSelector*, RenderStyle*, Element*) const; + virtual bool paintMenuList(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + + virtual void adjustMenuListButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const; + virtual bool paintMenuListButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + + virtual void adjustSliderTrackStyle(CSSStyleSelector*, RenderStyle*, Element*) const; + virtual bool paintSliderTrack(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + + virtual void adjustSliderThumbStyle(CSSStyleSelector*, RenderStyle*, Element*) const; + virtual bool paintSliderThumb(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + + virtual void adjustSearchFieldStyle(CSSStyleSelector*, RenderStyle*, Element*) const; + virtual bool paintSearchField(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + + virtual void adjustSearchFieldCancelButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const; + virtual bool paintSearchFieldCancelButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + + virtual void adjustSearchFieldDecorationStyle(CSSStyleSelector*, RenderStyle*, Element*) const; + virtual bool paintSearchFieldDecoration(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + + virtual void adjustSearchFieldResultsDecorationStyle(CSSStyleSelector*, RenderStyle*, Element*) const; + virtual bool paintSearchFieldResultsDecoration(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + + virtual void adjustSearchFieldResultsButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const; + virtual bool paintSearchFieldResultsButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + + virtual bool paintMediaFullscreenButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + virtual bool paintMediaPlayButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + virtual bool paintMediaMuteButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + virtual bool paintMediaSeekBackButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + virtual bool paintMediaSeekForwardButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + virtual bool paintMediaSliderTrack(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + virtual bool paintMediaSliderThumb(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } + +private: + mutable Color m_activeSelectionColor; + mutable Color m_inactiveSelectionColor; +}; + +// Function to obtain the theme. This is implemented in your platform-specific theme implementation to hand +// back the appropriate platform theme. +RenderTheme* theme(); + +} // namespace WebCore + +#endif // RenderTheme_h |