2 * This file is part of the theme implementation for form controls in WebCore.
4 * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Computer, Inc.
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
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27 #include "platform/Theme.h"
29 #include "platform/ThemeTypes.h"
31 #include "core/rendering/RenderObject.h"
32 #include "core/rendering/style/CachedUAStyle.h"
33 #include "platform/scroll/ScrollTypes.h"
34 #include "wtf/PassRefPtr.h"
35 #include "wtf/RefCounted.h"
36 #include "wtf/text/WTFString.h"
42 class HTMLInputElement;
47 class RenderTheme : public RefCounted<RenderTheme> {
52 virtual ~RenderTheme() { }
54 // This function is to be implemented in your platform-specific theme implementation to hand back the
55 // appropriate platform theme.
56 static RenderTheme& theme();
58 static void setSizeIfAuto(RenderStyle*, const IntSize&);
60 // This method is called whenever style has been computed for an element and the appearance
61 // property has been set to a value other than "none". The theme should map in all of the appropriate
62 // metrics and defaults given the contents of the style. This includes sophisticated operations like
63 // selection of control size based off the font, the disabling of appearance when certain other properties like
64 // "border" are set, or if the appearance is not supported by the theme.
65 void adjustStyle(RenderStyle*, Element*, const CachedUAStyle*);
67 // This method is called to paint the widget as a background of the RenderObject. A widget's foreground, e.g., the
68 // text of a button, is always rendered by the engine itself. The boolean return value indicates
69 // whether the CSS border/background should also be painted.
70 bool paint(RenderObject*, const PaintInfo&, const IntRect&);
71 bool paintBorderOnly(RenderObject*, const PaintInfo&, const IntRect&);
72 bool paintDecorations(RenderObject*, const PaintInfo&, const IntRect&);
74 // The remaining methods should be implemented by the platform-specific portion of the theme, e.g.,
75 // RenderThemeMac.cpp for Mac OS X.
77 // These methods return the theme's extra style sheets rules, to let each platform
78 // adjust the default CSS rules in html.css, quirks.css or mediaControls.css.
79 virtual String extraDefaultStyleSheet();
80 virtual String extraQuirksStyleSheet() { return String(); }
81 virtual String extraMediaControlsStyleSheet() { return String(); }
82 virtual String extraFullScreenStyleSheet() { return String(); }
84 // A method to obtain the baseline position for a "leaf" control. This will only be used if a baseline
85 // position cannot be determined by examining child content. Checkboxes and radio buttons are examples of
86 // controls that need to do this.
87 virtual int baselinePosition(const RenderObject*) const;
89 // A method for asking if a control is a container or not. Leaf controls have to have some special behavior (like
90 // the baseline position API above).
91 bool isControlContainer(ControlPart) const;
93 // Whether or not the control has been styled enough by the author to disable the native appearance.
94 virtual bool isControlStyled(const RenderStyle*, const CachedUAStyle*) const;
96 // Some controls may spill out of their containers (e.g., the check on an OS X checkbox). When these controls issues paint invalidations,
97 // the theme needs to communicate this inflated rect to the engine so that it can invalidate the whole control.
98 virtual void adjustPaintInvalidationRect(const RenderObject*, IntRect&);
100 // This method is called whenever a relevant state changes on a particular themed object, e.g., the mouse becomes pressed
101 // or a control becomes disabled.
102 virtual bool stateChanged(RenderObject*, ControlState) const;
104 bool shouldDrawDefaultFocusRing(RenderObject*) const;
106 // A method asking if the theme's controls actually care about redrawing when hovered.
107 virtual bool supportsHover(const RenderStyle*) const { return false; }
109 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
110 // A method asking if the platform is able to show a calendar picker for a given input type.
111 virtual bool supportsCalendarPicker(const AtomicString&) const;
114 // Text selection colors.
115 Color activeSelectionBackgroundColor() const;
116 Color inactiveSelectionBackgroundColor() const;
117 Color activeSelectionForegroundColor() const;
118 Color inactiveSelectionForegroundColor() const;
120 // List box selection colors
121 Color activeListBoxSelectionBackgroundColor() const;
122 Color activeListBoxSelectionForegroundColor() const;
123 Color inactiveListBoxSelectionBackgroundColor() const;
124 Color inactiveListBoxSelectionForegroundColor() const;
126 // Highlighting colors for TextMatches.
127 virtual Color platformActiveTextSearchHighlightColor() const;
128 virtual Color platformInactiveTextSearchHighlightColor() const;
130 Color focusRingColor() const;
131 virtual Color platformFocusRingColor() const { return Color(0, 0, 0); }
132 void setCustomFocusRingColor(const Color&);
133 static Color tapHighlightColor();
134 virtual Color platformTapHighlightColor() const { return RenderTheme::defaultTapHighlightColor; }
135 virtual Color platformDefaultCompositionBackgroundColor() const { return defaultCompositionBackgroundColor; }
136 virtual void platformColorsDidChange();
138 virtual double caretBlinkInterval() const { return 0.5; }
140 // System fonts and colors for CSS.
141 virtual void systemFont(CSSValueID systemFontID, FontStyle&, FontWeight&, float& fontSize, AtomicString& fontFamily) const = 0;
142 void systemFont(CSSValueID systemFontID, FontDescription&);
143 virtual Color systemColor(CSSValueID) const;
145 virtual int minimumMenuListSize(RenderStyle*) const { return 0; }
147 virtual void adjustSliderThumbSize(RenderStyle*, Element*) const;
149 virtual int popupInternalPaddingLeft(RenderStyle*) const { return 0; }
150 virtual int popupInternalPaddingRight(RenderStyle*) const { return 0; }
151 virtual int popupInternalPaddingTop(RenderStyle*) const { return 0; }
152 virtual int popupInternalPaddingBottom(RenderStyle*) const { return 0; }
153 virtual bool popupOptionSupportsTextIndent() const { return false; }
155 virtual ScrollbarControlSize scrollbarControlSizeForPart(ControlPart) { return RegularScrollbar; }
157 // Method for painting the caps lock indicator
158 virtual bool paintCapsLockIndicator(RenderObject*, const PaintInfo&, const IntRect&) { return 0; };
160 // Returns the repeat interval of the animation for the progress bar.
161 virtual double animationRepeatIntervalForProgressBar(RenderProgress*) const;
162 // Returns the duration of the animation for the progress bar.
163 virtual double animationDurationForProgressBar(RenderProgress*) const;
166 virtual String formatMediaControlsTime(float time) const;
167 virtual String formatMediaControlsCurrentTime(float currentTime, float duration) const;
169 virtual IntSize meterSizeForBounds(const RenderMeter*, const IntRect&) const;
170 virtual bool supportsMeter(ControlPart) const;
172 // Returns size of one slider tick mark for a horizontal track.
173 // For vertical tracks we rotate it and use it. i.e. Width is always length along the track.
174 virtual IntSize sliderTickSize() const = 0;
175 // Returns the distance of slider tick origin from the slider track center.
176 virtual int sliderTickOffsetFromTrackCenter() const = 0;
177 void paintSliderTicks(RenderObject*, const PaintInfo&, const IntRect&);
179 virtual bool shouldShowPlaceholderWhenFocused() const { return false; }
180 virtual bool shouldHaveSpinButton(HTMLInputElement*) const;
182 // Functions for <select> elements.
183 virtual bool delegatesMenuListRendering() const { return false; }
184 virtual bool popsMenuByArrowKeys() const { return false; }
185 virtual bool popsMenuBySpaceKey() const { return false; }
186 virtual bool popsMenuByReturnKey() const { return false; }
187 virtual bool popsMenuByAltDownUpOrF4Key() const { return false; }
189 virtual String fileListNameForWidth(Locale&, const FileList*, const Font&, int width) const;
191 virtual bool shouldOpenPickerWithF4Key() const;
193 virtual bool supportsSelectionForegroundColors() const { return true; }
195 virtual bool isModalColorChooser() const { return true; }
198 // The platform selection color.
199 virtual Color platformActiveSelectionBackgroundColor() const;
200 virtual Color platformInactiveSelectionBackgroundColor() const;
201 virtual Color platformActiveSelectionForegroundColor() const;
202 virtual Color platformInactiveSelectionForegroundColor() const;
204 virtual Color platformActiveListBoxSelectionBackgroundColor() const;
205 virtual Color platformInactiveListBoxSelectionBackgroundColor() const;
206 virtual Color platformActiveListBoxSelectionForegroundColor() const;
207 virtual Color platformInactiveListBoxSelectionForegroundColor() const;
209 // A method asking if the theme is able to draw the focus ring.
210 virtual bool supportsFocusRing(const RenderStyle*) const;
213 // Methods for each appearance value.
214 virtual void adjustCheckboxStyle(RenderStyle*, Element*) const;
215 virtual bool paintCheckbox(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
216 virtual void setCheckboxSize(RenderStyle*) const { }
218 virtual void adjustRadioStyle(RenderStyle*, Element*) const;
219 virtual bool paintRadio(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
220 virtual void setRadioSize(RenderStyle*) const { }
222 virtual void adjustButtonStyle(RenderStyle*, Element*) const;
223 virtual bool paintButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
225 virtual void adjustInnerSpinButtonStyle(RenderStyle*, Element*) const;
226 virtual bool paintInnerSpinButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
229 virtual bool paintTextField(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
231 virtual bool paintTextArea(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
233 virtual void adjustMenuListStyle(RenderStyle*, Element*) const;
234 virtual bool paintMenuList(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
236 virtual void adjustMenuListButtonStyle(RenderStyle*, Element*) const;
237 virtual bool paintMenuListButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
239 virtual bool paintMeter(RenderObject*, const PaintInfo&, const IntRect&);
241 virtual bool paintProgressBar(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
243 virtual bool paintSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
245 virtual void adjustSliderThumbStyle(RenderStyle*, Element*) const;
246 virtual bool paintSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
248 virtual void adjustSearchFieldStyle(RenderStyle*, Element*) const;
249 virtual bool paintSearchField(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
251 virtual void adjustSearchFieldCancelButtonStyle(RenderStyle*, Element*) const;
252 virtual bool paintSearchFieldCancelButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
254 virtual void adjustSearchFieldDecorationStyle(RenderStyle*, Element*) const;
255 virtual bool paintSearchFieldDecoration(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
257 virtual void adjustSearchFieldResultsDecorationStyle(RenderStyle*, Element*) const;
258 virtual bool paintSearchFieldResultsDecoration(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
260 virtual bool paintMediaFullscreenButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
261 virtual bool paintMediaPlayButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
262 virtual bool paintMediaOverlayPlayButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
263 virtual bool paintMediaMuteButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
264 virtual bool paintMediaSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
265 virtual bool paintMediaSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
266 virtual bool paintMediaVolumeSliderContainer(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
267 virtual bool paintMediaVolumeSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
268 virtual bool paintMediaVolumeSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
269 virtual bool paintMediaToggleClosedCaptionsButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
270 virtual bool paintMediaCastButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; };
271 virtual bool paintMediaControlsBackground(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
272 virtual bool paintMediaCurrentTime(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
273 virtual bool paintMediaTimeRemaining(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
274 virtual bool paintMediaFullScreenVolumeSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
275 virtual bool paintMediaFullScreenVolumeSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
277 virtual bool shouldUseFallbackTheme(RenderStyle*) const;
278 void adjustStyleUsingFallbackTheme(RenderStyle*, Element*);
279 bool paintUsingFallbackTheme(RenderObject*, const PaintInfo&, const IntRect&);
280 void adjustCheckboxStyleUsingFallbackTheme(RenderStyle*, Element*) const;
281 bool paintCheckboxUsingFallbackTheme(RenderObject*, const PaintInfo&, const IntRect&);
282 void adjustRadioStyleUsingFallbackTheme(RenderStyle*, Element*) const;
283 bool paintRadioUsingFallbackTheme(RenderObject*, const PaintInfo&, const IntRect&);
286 // Methods for state querying
287 ControlStates controlStatesForRenderer(const RenderObject* o) const;
288 bool isActive(const RenderObject*) const;
289 bool isChecked(const RenderObject*) const;
290 bool isIndeterminate(const RenderObject*) const;
291 bool isEnabled(const RenderObject*) const;
292 bool isFocused(const RenderObject*) const;
293 bool isPressed(const RenderObject*) const;
294 bool isSpinUpButtonPartPressed(const RenderObject*) const;
295 bool isHovered(const RenderObject*) const;
296 bool isSpinUpButtonPartHovered(const RenderObject*) const;
297 bool isReadOnlyControl(const RenderObject*) const;
300 Color m_customFocusRingColor;
301 bool m_hasCustomFocusRingColor;
303 // This color is expected to be drawn on a semi-transparent overlay,
304 // making it more transparent than its alpha value indicates.
305 static const RGBA32 defaultTapHighlightColor = 0x66000000;
307 static const RGBA32 defaultCompositionBackgroundColor = 0xFFFFDD55;
310 Theme* m_platformTheme; // The platform-specific theme.
316 #endif // RenderTheme_h