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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14 * Library General Public License for more details.
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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"
43 class HTMLInputElement;
50 class RenderTheme : public RefCounted<RenderTheme> {
55 virtual ~RenderTheme() { }
57 // This function is to be implemented in your platform-specific theme implementation to hand back the
58 // appropriate platform theme.
59 static RenderTheme& theme();
61 static void setSizeIfAuto(RenderStyle*, const IntSize&);
63 // This method is called whenever style has been computed for an element and the appearance
64 // property has been set to a value other than "none". The theme should map in all of the appropriate
65 // metrics and defaults given the contents of the style. This includes sophisticated operations like
66 // selection of control size based off the font, the disabling of appearance when certain other properties like
67 // "border" are set, or if the appearance is not supported by the theme.
68 void adjustStyle(RenderStyle*, Element*, const CachedUAStyle&);
70 // This method is called to paint the widget as a background of the RenderObject. A widget's foreground, e.g., the
71 // text of a button, is always rendered by the engine itself. The boolean return value indicates
72 // whether the CSS border/background should also be painted.
73 bool paint(RenderObject*, const PaintInfo&, const IntRect&);
74 bool paintBorderOnly(RenderObject*, const PaintInfo&, const IntRect&);
75 bool paintDecorations(RenderObject*, const PaintInfo&, const IntRect&);
77 // The remaining methods should be implemented by the platform-specific portion of the theme, e.g.,
78 // RenderThemeMac.cpp for Mac OS X.
80 // These methods return the theme's extra style sheets rules, to let each platform
81 // adjust the default CSS rules in html.css, quirks.css or mediaControls.css.
82 virtual String extraDefaultStyleSheet();
83 virtual String extraQuirksStyleSheet() { return String(); }
84 virtual String extraMediaControlsStyleSheet() { return String(); }
85 virtual String extraFullScreenStyleSheet() { return String(); }
87 // A method to obtain the baseline position for a "leaf" control. This will only be used if a baseline
88 // position cannot be determined by examining child content. Checkboxes and radio buttons are examples of
89 // controls that need to do this.
90 virtual int baselinePosition(const RenderObject*) const;
92 // A method for asking if a control is a container or not. Leaf controls have to have some special behavior (like
93 // the baseline position API above).
94 bool isControlContainer(ControlPart) const;
96 // A method asking if the control changes its tint when the window has focus or not.
97 virtual bool controlSupportsTints(const RenderObject*) const { return false; }
99 // Whether or not the control has been styled enough by the author to disable the native appearance.
100 virtual bool isControlStyled(const RenderStyle*, const CachedUAStyle&) const;
102 // A general method asking if any control tinting is supported at all.
103 virtual bool supportsControlTints() const { return false; }
105 // Some controls may spill out of their containers (e.g., the check on an OS X checkbox). When these controls repaint,
106 // the theme needs to communicate this inflated rect to the engine so that it can invalidate the whole control.
107 virtual void adjustRepaintRect(const RenderObject*, IntRect&);
109 // This method is called whenever a relevant state changes on a particular themed object, e.g., the mouse becomes pressed
110 // or a control becomes disabled.
111 virtual bool stateChanged(RenderObject*, ControlState) const;
113 bool shouldDrawDefaultFocusRing(RenderObject*) const;
115 // A method asking if the theme's controls actually care about redrawing when hovered.
116 virtual bool supportsHover(const RenderStyle*) const { return false; }
118 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
119 // A method asking if the platform is able to show a calendar picker for a given input type.
120 virtual bool supportsCalendarPicker(const AtomicString&) const;
123 // Text selection colors.
124 Color activeSelectionBackgroundColor() const;
125 Color inactiveSelectionBackgroundColor() const;
126 Color activeSelectionForegroundColor() const;
127 Color inactiveSelectionForegroundColor() const;
129 // List box selection colors
130 Color activeListBoxSelectionBackgroundColor() const;
131 Color activeListBoxSelectionForegroundColor() const;
132 Color inactiveListBoxSelectionBackgroundColor() const;
133 Color inactiveListBoxSelectionForegroundColor() const;
135 // Highlighting colors for TextMatches.
136 virtual Color platformActiveTextSearchHighlightColor() const;
137 virtual Color platformInactiveTextSearchHighlightColor() const;
139 Color focusRingColor() const;
140 virtual Color platformFocusRingColor() const { return Color(0, 0, 0); }
141 void setCustomFocusRingColor(const Color&);
142 static Color tapHighlightColor();
143 virtual Color platformTapHighlightColor() const { return RenderTheme::defaultTapHighlightColor; }
144 virtual void platformColorsDidChange();
146 virtual double caretBlinkInterval() const { return 0.5; }
148 // System fonts and colors for CSS.
149 virtual void systemFont(CSSValueID, FontDescription&) const = 0;
150 virtual Color systemColor(CSSValueID) const;
152 virtual int minimumMenuListSize(RenderStyle*) const { return 0; }
154 virtual void adjustSliderThumbSize(RenderStyle*, Element*) const;
156 virtual int popupInternalPaddingLeft(RenderStyle*) const { return 0; }
157 virtual int popupInternalPaddingRight(RenderStyle*) const { return 0; }
158 virtual int popupInternalPaddingTop(RenderStyle*) const { return 0; }
159 virtual int popupInternalPaddingBottom(RenderStyle*) const { return 0; }
160 virtual bool popupOptionSupportsTextIndent() const { return false; }
162 virtual ScrollbarControlSize scrollbarControlSizeForPart(ControlPart) { return RegularScrollbar; }
164 // Method for painting the caps lock indicator
165 virtual bool paintCapsLockIndicator(RenderObject*, const PaintInfo&, const IntRect&) { return 0; };
167 // Returns the repeat interval of the animation for the progress bar.
168 virtual double animationRepeatIntervalForProgressBar(RenderProgress*) const;
169 // Returns the duration of the animation for the progress bar.
170 virtual double animationDurationForProgressBar(RenderProgress*) const;
173 virtual String formatMediaControlsTime(float time) const;
174 virtual String formatMediaControlsCurrentTime(float currentTime, float duration) const;
176 virtual IntSize meterSizeForBounds(const RenderMeter*, const IntRect&) const;
177 virtual bool supportsMeter(ControlPart) const;
179 // Returns size of one slider tick mark for a horizontal track.
180 // For vertical tracks we rotate it and use it. i.e. Width is always length along the track.
181 virtual IntSize sliderTickSize() const = 0;
182 // Returns the distance of slider tick origin from the slider track center.
183 virtual int sliderTickOffsetFromTrackCenter() const = 0;
184 void paintSliderTicks(RenderObject*, const PaintInfo&, const IntRect&);
186 virtual bool shouldShowPlaceholderWhenFocused() const { return false; }
187 virtual bool shouldHaveSpinButton(HTMLInputElement*) const;
189 // Functions for <select> elements.
190 virtual bool delegatesMenuListRendering() const { return false; }
191 virtual bool popsMenuByArrowKeys() const { return false; }
192 virtual bool popsMenuBySpaceOrReturn() const { return false; }
194 virtual String fileListNameForWidth(Locale&, const FileList*, const Font&, int width) const;
196 virtual bool shouldOpenPickerWithF4Key() const;
198 virtual bool supportsSelectionForegroundColors() const { return true; }
201 // The platform selection color.
202 virtual Color platformActiveSelectionBackgroundColor() const;
203 virtual Color platformInactiveSelectionBackgroundColor() const;
204 virtual Color platformActiveSelectionForegroundColor() const;
205 virtual Color platformInactiveSelectionForegroundColor() const;
207 virtual Color platformActiveListBoxSelectionBackgroundColor() const;
208 virtual Color platformInactiveListBoxSelectionBackgroundColor() const;
209 virtual Color platformActiveListBoxSelectionForegroundColor() const;
210 virtual Color platformInactiveListBoxSelectionForegroundColor() const;
212 // A method asking if the theme is able to draw the focus ring.
213 virtual bool supportsFocusRing(const RenderStyle*) const;
216 // Methods for each appearance value.
217 virtual void adjustCheckboxStyle(RenderStyle*, Element*) const;
218 virtual bool paintCheckbox(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
219 virtual void setCheckboxSize(RenderStyle*) const { }
221 virtual void adjustRadioStyle(RenderStyle*, Element*) const;
222 virtual bool paintRadio(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
223 virtual void setRadioSize(RenderStyle*) const { }
225 virtual void adjustButtonStyle(RenderStyle*, Element*) const;
226 virtual bool paintButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
228 virtual void adjustInnerSpinButtonStyle(RenderStyle*, Element*) const;
229 virtual bool paintInnerSpinButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
232 virtual bool paintTextField(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
234 virtual bool paintTextArea(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
236 virtual void adjustMenuListStyle(RenderStyle*, Element*) const;
237 virtual bool paintMenuList(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
239 virtual void adjustMenuListButtonStyle(RenderStyle*, Element*) const;
240 virtual bool paintMenuListButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
242 virtual bool paintMeter(RenderObject*, const PaintInfo&, const IntRect&);
244 virtual bool paintProgressBar(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
246 virtual bool paintSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
248 virtual void adjustSliderThumbStyle(RenderStyle*, Element*) const;
249 virtual bool paintSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
251 virtual void adjustSearchFieldStyle(RenderStyle*, Element*) const;
252 virtual bool paintSearchField(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
254 virtual void adjustSearchFieldCancelButtonStyle(RenderStyle*, Element*) const;
255 virtual bool paintSearchFieldCancelButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
257 virtual void adjustSearchFieldDecorationStyle(RenderStyle*, Element*) const;
258 virtual bool paintSearchFieldDecoration(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
260 virtual void adjustSearchFieldResultsDecorationStyle(RenderStyle*, Element*) const;
261 virtual bool paintSearchFieldResultsDecoration(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
263 virtual bool paintMediaFullscreenButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
264 virtual bool paintMediaPlayButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
265 virtual bool paintMediaOverlayPlayButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
266 virtual bool paintMediaMuteButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
267 virtual bool paintMediaSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
268 virtual bool paintMediaSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
269 virtual bool paintMediaVolumeSliderContainer(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
270 virtual bool paintMediaVolumeSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
271 virtual bool paintMediaVolumeSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
272 virtual bool paintMediaToggleClosedCaptionsButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
273 virtual bool paintMediaControlsBackground(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
274 virtual bool paintMediaCurrentTime(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
275 virtual bool paintMediaTimeRemaining(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
276 virtual bool paintMediaFullScreenVolumeSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
277 virtual bool paintMediaFullScreenVolumeSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
279 virtual bool shouldUseFallbackTheme(RenderStyle*) const;
280 void adjustStyleUsingFallbackTheme(RenderStyle*, Element*);
281 bool paintUsingFallbackTheme(RenderObject*, const PaintInfo&, const IntRect&);
282 void adjustCheckboxStyleUsingFallbackTheme(RenderStyle*, Element*) const;
283 bool paintCheckboxUsingFallbackTheme(RenderObject*, const PaintInfo&, const IntRect&);
284 void adjustRadioStyleUsingFallbackTheme(RenderStyle*, Element*) const;
285 bool paintRadioUsingFallbackTheme(RenderObject*, const PaintInfo&, const IntRect&);
288 // Methods for state querying
289 ControlStates controlStatesForRenderer(const RenderObject* o) const;
290 bool isActive(const RenderObject*) const;
291 bool isChecked(const RenderObject*) const;
292 bool isIndeterminate(const RenderObject*) const;
293 bool isEnabled(const RenderObject*) const;
294 bool isFocused(const RenderObject*) const;
295 bool isPressed(const RenderObject*) const;
296 bool isSpinUpButtonPartPressed(const RenderObject*) const;
297 bool isHovered(const RenderObject*) const;
298 bool isSpinUpButtonPartHovered(const RenderObject*) const;
299 bool isReadOnlyControl(const RenderObject*) const;
302 Color m_customFocusRingColor;
303 bool m_hasCustomFocusRingColor;
305 // This color is expected to be drawn on a semi-transparent overlay,
306 // making it more transparent than its alpha value indicates.
307 static const RGBA32 defaultTapHighlightColor = 0x66000000;
310 Theme* m_platformTheme; // The platform-specific theme.
314 } // namespace WebCore
316 #endif // RenderTheme_h