/* * This file is part of the theme implementation for form controls in WebCore. * * Copyright (C) 2005 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 propId, FontDescription&) const = 0; virtual int minimumMenuListSize(RenderStyle*) const { return 0; } virtual void adjustSliderThumbSize(RenderObject*) const; // Methods for state querying 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; } 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