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
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
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 // A method asking if the control changes its tint when the window has focus or not.
94 virtual bool controlSupportsTints(const RenderObject*) const { return false; }
96 // Whether or not the control has been styled enough by the author to disable the native appearance.
97 virtual bool isControlStyled(const RenderStyle*, const CachedUAStyle*) const;
99 // A general method asking if any control tinting is supported at all.
100 virtual bool supportsControlTints() const { return false; }
102 // Some controls may spill out of their containers (e.g., the check on an OS X checkbox). When these controls repaint,
103 // the theme needs to communicate this inflated rect to the engine so that it can invalidate the whole control.
104 virtual void adjustRepaintRect(const RenderObject*, IntRect&);
106 // This method is called whenever a relevant state changes on a particular themed object, e.g., the mouse becomes pressed
107 // or a control becomes disabled.
108 virtual bool stateChanged(RenderObject*, ControlState) const;
110 bool shouldDrawDefaultFocusRing(RenderObject*) const;
112 // A method asking if the theme's controls actually care about redrawing when hovered.
113 virtual bool supportsHover(const RenderStyle*) const { return false; }
115 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
116 // A method asking if the platform is able to show a calendar picker for a given input type.
117 virtual bool supportsCalendarPicker(const AtomicString&) const;
120 // Text selection colors.
121 Color activeSelectionBackgroundColor() const;
122 Color inactiveSelectionBackgroundColor() const;
123 Color activeSelectionForegroundColor() const;
124 Color inactiveSelectionForegroundColor() const;
126 // List box selection colors
127 Color activeListBoxSelectionBackgroundColor() const;
128 Color activeListBoxSelectionForegroundColor() const;
129 Color inactiveListBoxSelectionBackgroundColor() const;
130 Color inactiveListBoxSelectionForegroundColor() const;
132 // Highlighting colors for TextMatches.
133 virtual Color platformActiveTextSearchHighlightColor() const;
134 virtual Color platformInactiveTextSearchHighlightColor() const;
136 Color focusRingColor() const;
137 virtual Color platformFocusRingColor() const { return Color(0, 0, 0); }
138 void setCustomFocusRingColor(const Color&);
139 static Color tapHighlightColor();
140 virtual Color platformTapHighlightColor() const { return RenderTheme::defaultTapHighlightColor; }
141 virtual Color platformDefaultCompositionBackgroundColor() const { return defaultCompositionBackgroundColor; }
142 virtual void platformColorsDidChange();
144 virtual double caretBlinkInterval() const { return 0.5; }
146 // System fonts and colors for CSS.
147 virtual void systemFont(CSSValueID, FontDescription&) const = 0;
148 virtual Color systemColor(CSSValueID) const;
150 virtual int minimumMenuListSize(RenderStyle*) const { return 0; }
152 virtual void adjustSliderThumbSize(RenderStyle*, Element*) const;
154 virtual int popupInternalPaddingLeft(RenderStyle*) const { return 0; }
155 virtual int popupInternalPaddingRight(RenderStyle*) const { return 0; }
156 virtual int popupInternalPaddingTop(RenderStyle*) const { return 0; }
157 virtual int popupInternalPaddingBottom(RenderStyle*) const { return 0; }
158 virtual bool popupOptionSupportsTextIndent() const { return false; }
160 virtual ScrollbarControlSize scrollbarControlSizeForPart(ControlPart) { return RegularScrollbar; }
162 // Method for painting the caps lock indicator
163 virtual bool paintCapsLockIndicator(RenderObject*, const PaintInfo&, const IntRect&) { return 0; };
165 // Returns the repeat interval of the animation for the progress bar.
166 virtual double animationRepeatIntervalForProgressBar(RenderProgress*) const;
167 // Returns the duration of the animation for the progress bar.
168 virtual double animationDurationForProgressBar(RenderProgress*) const;
171 virtual String formatMediaControlsTime(float time) const;
172 virtual String formatMediaControlsCurrentTime(float currentTime, float duration) const;
174 virtual IntSize meterSizeForBounds(const RenderMeter*, const IntRect&) const;
175 virtual bool supportsMeter(ControlPart) const;
177 // Returns size of one slider tick mark for a horizontal track.
178 // For vertical tracks we rotate it and use it. i.e. Width is always length along the track.
179 virtual IntSize sliderTickSize() const = 0;
180 // Returns the distance of slider tick origin from the slider track center.
181 virtual int sliderTickOffsetFromTrackCenter() const = 0;
182 void paintSliderTicks(RenderObject*, const PaintInfo&, const IntRect&);
184 virtual bool shouldShowPlaceholderWhenFocused() const { return false; }
185 virtual bool shouldHaveSpinButton(HTMLInputElement*) const;
187 // Functions for <select> elements.
188 virtual bool delegatesMenuListRendering() const { return false; }
189 virtual bool popsMenuByArrowKeys() const { return false; }
190 virtual bool popsMenuBySpaceOrReturn() const { return false; }
192 virtual String fileListNameForWidth(Locale&, const FileList*, const Font&, int width) const;
194 virtual bool shouldOpenPickerWithF4Key() const;
196 virtual bool supportsSelectionForegroundColors() const { return true; }
199 // The platform selection color.
200 virtual Color platformActiveSelectionBackgroundColor() const;
201 virtual Color platformInactiveSelectionBackgroundColor() const;
202 virtual Color platformActiveSelectionForegroundColor() const;
203 virtual Color platformInactiveSelectionForegroundColor() const;
205 virtual Color platformActiveListBoxSelectionBackgroundColor() const;
206 virtual Color platformInactiveListBoxSelectionBackgroundColor() const;
207 virtual Color platformActiveListBoxSelectionForegroundColor() const;
208 virtual Color platformInactiveListBoxSelectionForegroundColor() const;
210 // A method asking if the theme is able to draw the focus ring.
211 virtual bool supportsFocusRing(const RenderStyle*) const;
214 // Methods for each appearance value.
215 virtual void adjustCheckboxStyle(RenderStyle*, Element*) const;
216 virtual bool paintCheckbox(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
217 virtual void setCheckboxSize(RenderStyle*) const { }
219 virtual void adjustRadioStyle(RenderStyle*, Element*) const;
220 virtual bool paintRadio(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
221 virtual void setRadioSize(RenderStyle*) const { }
223 virtual void adjustButtonStyle(RenderStyle*, Element*) const;
224 virtual bool paintButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
226 virtual void adjustInnerSpinButtonStyle(RenderStyle*, Element*) const;
227 virtual bool paintInnerSpinButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
230 virtual bool paintTextField(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
232 virtual bool paintTextArea(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
234 virtual void adjustMenuListStyle(RenderStyle*, Element*) const;
235 virtual bool paintMenuList(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
237 virtual void adjustMenuListButtonStyle(RenderStyle*, Element*) const;
238 virtual bool paintMenuListButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
240 virtual bool paintMeter(RenderObject*, const PaintInfo&, const IntRect&);
242 virtual bool paintProgressBar(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
244 virtual bool paintSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
246 virtual void adjustSliderThumbStyle(RenderStyle*, Element*) const;
247 virtual bool paintSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
249 virtual void adjustSearchFieldStyle(RenderStyle*, Element*) const;
250 virtual bool paintSearchField(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
252 virtual void adjustSearchFieldCancelButtonStyle(RenderStyle*, Element*) const;
253 virtual bool paintSearchFieldCancelButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
255 virtual void adjustSearchFieldDecorationStyle(RenderStyle*, Element*) const;
256 virtual bool paintSearchFieldDecoration(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
258 virtual void adjustSearchFieldResultsDecorationStyle(RenderStyle*, Element*) const;
259 virtual bool paintSearchFieldResultsDecoration(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
261 virtual bool paintMediaFullscreenButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
262 virtual bool paintMediaPlayButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
263 virtual bool paintMediaOverlayPlayButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
264 virtual bool paintMediaMuteButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
265 virtual bool paintMediaSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
266 virtual bool paintMediaSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
267 virtual bool paintMediaVolumeSliderContainer(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
268 virtual bool paintMediaVolumeSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
269 virtual bool paintMediaVolumeSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
270 virtual bool paintMediaToggleClosedCaptionsButton(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.
314 } // namespace WebCore
316 #endif // RenderTheme_h