1 /* 2 * This file is part of the theme implementation for form controls in WebCore. 3 * 4 * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Computer, Inc. 5 * 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. 10 * 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. 15 * 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. 20 * 21 */ 22 23 #ifndef RenderTheme_h 24 #define RenderTheme_h 25 26 #if USE(NEW_THEME) 27 #include "platform/Theme.h" 28 #else 29 #include "platform/ThemeTypes.h" 30 #endif 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" 37 38 namespace WebCore { 39 40 class Element; 41 class FileList; 42 class HTMLInputElement; 43 class RenderMeter; 44 class RenderProgress; 45 46 47 class RenderTheme : public RefCounted<RenderTheme> { 48 protected: 49 RenderTheme(); 50 51 public: 52 virtual ~RenderTheme() { } 53 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(); 57 58 static void setSizeIfAuto(RenderStyle*, const IntSize&); 59 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*); 66 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&); 73 74 // The remaining methods should be implemented by the platform-specific portion of the theme, e.g., 75 // RenderThemeMac.cpp for Mac OS X. 76 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(); } 83 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; 88 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; 92 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; } 95 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; 98 99 // A general method asking if any control tinting is supported at all. 100 virtual bool supportsControlTints() const { return false; } 101 102 // 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&); 105 106 // 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; 109 110 bool shouldDrawDefaultFocusRing(RenderObject*) const; 111 112 // A method asking if the theme's controls actually care about redrawing when hovered. 113 virtual bool supportsHover(const RenderStyle*) const { return false; } 114 115 #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; 118 #endif 119 120 // Text selection colors. 121 Color activeSelectionBackgroundColor() const; 122 Color inactiveSelectionBackgroundColor() const; 123 Color activeSelectionForegroundColor() const; 124 Color inactiveSelectionForegroundColor() const; 125 126 // List box selection colors 127 Color activeListBoxSelectionBackgroundColor() const; 128 Color activeListBoxSelectionForegroundColor() const; 129 Color inactiveListBoxSelectionBackgroundColor() const; 130 Color inactiveListBoxSelectionForegroundColor() const; 131 132 // Highlighting colors for TextMatches. 133 virtual Color platformActiveTextSearchHighlightColor() const; 134 virtual Color platformInactiveTextSearchHighlightColor() const; 135 136 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(); 143 144 virtual double caretBlinkInterval() const { return 0.5; } 145 146 // System fonts and colors for CSS. 147 virtual void systemFont(CSSValueID, FontDescription&) const = 0; 148 virtual Color systemColor(CSSValueID) const; 149 150 virtual int minimumMenuListSize(RenderStyle*) const { return 0; } 151 152 virtual void adjustSliderThumbSize(RenderStyle*, Element*) const; 153 154 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; } 159 160 virtual ScrollbarControlSize scrollbarControlSizeForPart(ControlPart) { return RegularScrollbar; } 161 162 // Method for painting the caps lock indicator 163 virtual bool paintCapsLockIndicator(RenderObject*, const PaintInfo&, const IntRect&) { return 0; }; 164 165 // 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; 169 170 // Media controls 171 virtual String formatMediaControlsTime(float time) const; 172 virtual String formatMediaControlsCurrentTime(float currentTime, float duration) const; 173 174 virtual IntSize meterSizeForBounds(const RenderMeter*, const IntRect&) const; 175 virtual bool supportsMeter(ControlPart) const; 176 177 // 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&); 183 184 virtual bool shouldShowPlaceholderWhenFocused() const { return false; } 185 virtual bool shouldHaveSpinButton(HTMLInputElement*) const; 186 187 // 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; } 191 192 virtual String fileListNameForWidth(Locale&, const FileList*, const Font&, int width) const; 193 194 virtual bool shouldOpenPickerWithF4Key() const; 195 196 virtual bool supportsSelectionForegroundColors() const { return true; } 197 198 protected: 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; 204 205 virtual Color platformActiveListBoxSelectionBackgroundColor() const; 206 virtual Color platformInactiveListBoxSelectionBackgroundColor() const; 207 virtual Color platformActiveListBoxSelectionForegroundColor() const; 208 virtual Color platformInactiveListBoxSelectionForegroundColor() const; 209 210 // A method asking if the theme is able to draw the focus ring. 211 virtual bool supportsFocusRing(const RenderStyle*) const; 212 213 #if !USE(NEW_THEME) 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 { } 218 219 virtual void adjustRadioStyle(RenderStyle*, Element*) const; 220 virtual bool paintRadio(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 221 virtual void setRadioSize(RenderStyle*) const { } 222 223 virtual void adjustButtonStyle(RenderStyle*, Element*) const; 224 virtual bool paintButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 225 226 virtual void adjustInnerSpinButtonStyle(RenderStyle*, Element*) const; 227 virtual bool paintInnerSpinButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 228 #endif 229 230 virtual bool paintTextField(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 231 232 virtual bool paintTextArea(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 233 234 virtual void adjustMenuListStyle(RenderStyle*, Element*) const; 235 virtual bool paintMenuList(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 236 237 virtual void adjustMenuListButtonStyle(RenderStyle*, Element*) const; 238 virtual bool paintMenuListButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 239 240 virtual bool paintMeter(RenderObject*, const PaintInfo&, const IntRect&); 241 242 virtual bool paintProgressBar(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 243 244 virtual bool paintSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 245 246 virtual void adjustSliderThumbStyle(RenderStyle*, Element*) const; 247 virtual bool paintSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 248 249 virtual void adjustSearchFieldStyle(RenderStyle*, Element*) const; 250 virtual bool paintSearchField(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 251 252 virtual void adjustSearchFieldCancelButtonStyle(RenderStyle*, Element*) const; 253 virtual bool paintSearchFieldCancelButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 254 255 virtual void adjustSearchFieldDecorationStyle(RenderStyle*, Element*) const; 256 virtual bool paintSearchFieldDecoration(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 257 258 virtual void adjustSearchFieldResultsDecorationStyle(RenderStyle*, Element*) const; 259 virtual bool paintSearchFieldResultsDecoration(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 260 261 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; } 276 277 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&); 284 285 public: 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; 298 299 private: 300 Color m_customFocusRingColor; 301 bool m_hasCustomFocusRingColor; 302 303 // 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; 306 307 static const RGBA32 defaultCompositionBackgroundColor = 0xFFFFDD55; 308 309 #if USE(NEW_THEME) 310 Theme* m_platformTheme; // The platform-specific theme. 311 #endif 312 }; 313 314 } // namespace WebCore 315 316 #endif // RenderTheme_h 317
