/*

 * This file is part of the theme implementation for form controls in WebCore.

 *

 * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 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

#if USE(NEW_THEME)

#include "Theme.h"

#else

#include "ThemeTypes.h"

#endif

#include "RenderObject.h"

#include "RenderTheme.h"

#include "ScrollTypes.h"

#include <wtf/PassRefPtr.h>

#include <wtf/RefCounted.h>

namespace WebCore {

class Element;

class PopupMenu;

class RenderMenuList;

#if ENABLE(METER_TAG)

class RenderMeter;

#endif

#if ENABLE(PROGRESS_TAG)

class RenderProgress;

#endif

class CSSStyleSheet;

class RenderTheme : public RefCounted<RenderTheme> {

protected:

    RenderTheme();

public:

    virtual ~RenderTheme() { }

    // This function is to be implemented in your platform-specific theme implementation to hand back the

    // appropriate platform theme. When the theme is needed in non-page dependent code, a default theme is

    // used as fallback, which is returned for a nulled page, so the platform code needs to account for this.

    static PassRefPtr<RenderTheme> themeForPage(Page* page);

    // When the theme is needed in non-page dependent code, the defaultTheme() is used as fallback.

    static inline PassRefPtr<RenderTheme> defaultTheme()

    {

        return themeForPage(0);

    };

    // 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 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 PaintInfo&, const IntRect&);

    bool paintBorderOnly(RenderObject*, const PaintInfo&, const IntRect&);

    bool paintDecorations(RenderObject*, const 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.

    // These methods return the theme's extra style sheets rules, to let each platform

    // adjust the default CSS rules in html.css, quirks.css, or mediaControls.css

    virtual String extraDefaultStyleSheet() { return String(); }

    virtual String extraQuirksStyleSheet() { return String(); }

#if ENABLE(VIDEO)

    virtual String extraMediaControlsStyleSheet() { return String(); };

#endif

    // 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; }

    // Text selection colors.

    Color activeSelectionBackgroundColor() const;

    Color inactiveSelectionBackgroundColor() const;

    Color activeSelectionForegroundColor() const;

    Color inactiveSelectionForegroundColor() const;

    // List box selection colors

    Color activeListBoxSelectionBackgroundColor() const;

    Color activeListBoxSelectionForegroundColor() const;

    Color inactiveListBoxSelectionBackgroundColor() const;

    Color inactiveListBoxSelectionForegroundColor() const;

    // Highlighting colors for TextMatches.

    virtual Color platformActiveTextSearchHighlightColor() const;

    virtual Color platformInactiveTextSearchHighlightColor() const;

    static Color focusRingColor();

    virtual Color platformFocusRingColor() const { return Color(0, 0, 0); }

    static void setCustomFocusRingColor(const Color&);

    virtual void platformColorsDidChange();

    virtual double caretBlinkInterval() 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; }

    virtual bool popupOptionSupportsTextIndent() const { return false; }

    virtual ScrollbarControlSize scrollbarControlSizeForPart(ControlPart) { return RegularScrollbar; }

    // Method for painting the caps lock indicator

    virtual bool paintCapsLockIndicator(RenderObject*, const PaintInfo&, const IntRect&) { return 0; };

#if ENABLE(PROGRESS_TAG)

    // Returns the repeat interval of the animation for the progress bar.

    virtual double animationRepeatIntervalForProgressBar(RenderProgress*) const;

    // Returns the duration of the animation for the progress bar.

    virtual double animationDurationForProgressBar(RenderProgress*) const;

#endif

#if ENABLE(VIDEO)

    // Media controls

    virtual bool hitTestMediaControlPart(RenderObject*, const IntPoint& absPoint);

    virtual bool shouldRenderMediaControlPart(ControlPart, Element*);

    virtual double mediaControlsFadeInDuration() { return 0.1; }

    virtual double mediaControlsFadeOutDuration() { return 0.3; }

    virtual String formatMediaControlsTime(float time) const;

    virtual String formatMediaControlsCurrentTime(float currentTime, float duration) const;

    virtual String formatMediaControlsRemainingTime(float currentTime, float duration) const;

    // Returns the media volume slider container's offset from the mute button.

    virtual IntPoint volumeSliderOffsetFromMuteButton(Node*, const IntSize&) const;

#endif

#if ENABLE(METER_TAG)

    virtual IntSize meterSizeForBounds(const RenderMeter*, const IntRect&) const;

    virtual bool supportsMeter(ControlPart, bool isHorizontal) const;

#endif

protected:

    // The platform selection color.

    virtual Color platformActiveSelectionBackgroundColor() const;

    virtual Color platformInactiveSelectionBackgroundColor() const;

    virtual Color platformActiveSelectionForegroundColor() const;

    virtual Color platformInactiveSelectionForegroundColor() const;

    virtual Color platformActiveListBoxSelectionBackgroundColor() const;

    virtual Color platformInactiveListBoxSelectionBackgroundColor() const;

    virtual Color platformActiveListBoxSelectionForegroundColor() const;

    virtual Color platformInactiveListBoxSelectionForegroundColor() const;

    virtual bool supportsSelectionForegroundColors() const { return true; }

    virtual bool supportsListBoxSelectionForegroundColors() const { return true; }

#if !USE(NEW_THEME)

    // Methods for each appearance value.

    virtual void adjustCheckboxStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintCheckbox(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual void setCheckboxSize(RenderStyle*) const { }

    virtual void adjustRadioStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintRadio(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual void setRadioSize(RenderStyle*) const { }

    virtual void adjustButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual void setButtonSize(RenderStyle*) const { }

    virtual void adjustInnerSpinButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintInnerSpinButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual void adjustOuterSpinButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintOuterSpinButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

#endif

    virtual void adjustTextFieldStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintTextField(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual void adjustTextAreaStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintTextArea(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual void adjustMenuListStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintMenuList(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual void adjustMenuListButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintMenuListButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

#if ENABLE(METER_TAG)

    virtual void adjustMeterStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintMeter(RenderObject*, const PaintInfo&, const IntRect&);

#endif

#if ENABLE(PROGRESS_TAG)

    virtual void adjustProgressBarStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintProgressBar(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

#endif

#if ENABLE(INPUT_SPEECH)

    virtual void adjustInputFieldSpeechButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintInputFieldSpeechButton(RenderObject*, const PaintInfo&, const IntRect&);

#endif

    virtual void adjustSliderTrackStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual void adjustSliderThumbStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual void adjustSearchFieldStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintSearchField(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual void adjustSearchFieldCancelButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintSearchFieldCancelButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual void adjustSearchFieldDecorationStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintSearchFieldDecoration(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual void adjustSearchFieldResultsDecorationStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintSearchFieldResultsDecoration(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual void adjustSearchFieldResultsButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const;

    virtual bool paintSearchFieldResultsButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual bool paintMediaFullscreenButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual bool paintMediaPlayButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual bool paintMediaMuteButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual bool paintMediaSeekBackButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual bool paintMediaSeekForwardButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual bool paintMediaSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual bool paintMediaSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual bool paintMediaVolumeSliderContainer(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual bool paintMediaVolumeSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual bool paintMediaVolumeSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual bool paintMediaRewindButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual bool paintMediaReturnToRealtimeButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual bool paintMediaToggleClosedCaptionsButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual bool paintMediaControlsBackground(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual bool paintMediaCurrentTime(RenderObject*, const PaintInfo&, const IntRect&) { return true; }

    virtual bool paintMediaTimeRemaining(RenderObject*, const 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 isSpinUpButtonPartPressed(const RenderObject*) const;

    bool isHovered(const RenderObject*) const;

    bool isSpinUpButtonPartHovered(const RenderObject*) const;

    bool isReadOnlyControl(const RenderObject*) const;

    bool isDefault(const RenderObject*) const;

private:

    mutable Color m_activeSelectionBackgroundColor;

    mutable Color m_inactiveSelectionBackgroundColor;

    mutable Color m_activeSelectionForegroundColor;

    mutable Color m_inactiveSelectionForegroundColor;

    mutable Color m_activeListBoxSelectionBackgroundColor;

    mutable Color m_inactiveListBoxSelectionBackgroundColor;

    mutable Color m_activeListBoxSelectionForegroundColor;

    mutable Color m_inactiveListBoxSelectionForegroundColor;

#if USE(NEW_THEME)

    Theme* m_theme; // The platform-specific theme.

#endif

};

} // namespace WebCore

#endif // RenderTheme_h