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authorThe Android Open Source Project <initial-contribution@android.com>2009-03-03 18:28:41 -0800
committerThe Android Open Source Project <initial-contribution@android.com>2009-03-03 18:28:41 -0800
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-/*
- * 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"
-#if USE(NEW_THEME)
-#include "Theme.h"
-#else
-#include "ThemeTypes.h"
-#endif
-
-namespace WebCore {
-
-class Element;
-class PopupMenu;
-class RenderMenuList;
-class CSSStyleSheet;
-
-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 FillLayer&, const Color& backgroundColor);
-
- // This method is called once, from CSSStyleSelector::loadDefaultStyle(), to let each platform adjust
- // the default CSS rules in html4.css.
- static void adjustDefaultStyleSheet(CSSStyleSheet*);
-
- // 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 int 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).
- bool isControlContainer(ControlPart) 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 FillLayer&, 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;
-
- virtual void platformColorsDidChange();
-
- virtual double caretBlinkFrequency() const { return 0.5; }
-
- // System fonts and colors for CSS.
- virtual void systemFont(int cssValueId, FontDescription&) const = 0;
- virtual Color systemColor(int cssValueId) const;
-
- virtual int minimumMenuListSize(RenderStyle*) const { return 0; }
-
- virtual void adjustSliderThumbSize(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:
-#if !USE(NEW_THEME)
- // 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 { }
-#endif
-
- 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; }
-
-#ifdef ANDROID_LISTBOX_USES_MENU_LIST
- virtual void adjustListboxStyle(CSSStyleSelector*, RenderStyle*, Element*) const {}
-#endif
- 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; }
-
-public:
- // Methods for state querying
- ControlStates controlStatesForRenderer(const RenderObject* o) const;
- 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;
- bool isDefault(const RenderObject*) const;
-
-private:
- mutable Color m_activeSelectionColor;
- mutable Color m_inactiveSelectionColor;
-#if USE(NEW_THEME)
- Theme* m_theme; // The platform-specific theme.
-#endif
-};
-
-// 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