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 blink { 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 // 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; 95 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&); 99 100 // 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; 103 104 bool shouldDrawDefaultFocusRing(RenderObject*) const; 105 106 // A method asking if the theme's controls actually care about redrawing when hovered. 107 virtual bool supportsHover(const RenderStyle*) const { return false; } 108 109 #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; 112 #endif 113 114 // Text selection colors. 115 Color activeSelectionBackgroundColor() const; 116 Color inactiveSelectionBackgroundColor() const; 117 Color activeSelectionForegroundColor() const; 118 Color inactiveSelectionForegroundColor() const; 119 120 // List box selection colors 121 Color activeListBoxSelectionBackgroundColor() const; 122 Color activeListBoxSelectionForegroundColor() const; 123 Color inactiveListBoxSelectionBackgroundColor() const; 124 Color inactiveListBoxSelectionForegroundColor() const; 125 126 // Highlighting colors for TextMatches. 127 virtual Color platformActiveTextSearchHighlightColor() const; 128 virtual Color platformInactiveTextSearchHighlightColor() const; 129 130 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(); 137 138 virtual double caretBlinkInterval() const { return 0.5; } 139 140 // System fonts and colors for CSS. 141 virtual void systemFont(CSSValueID, FontDescription&) const = 0; 142 virtual Color systemColor(CSSValueID) const; 143 144 virtual int minimumMenuListSize(RenderStyle*) const { return 0; } 145 146 virtual void adjustSliderThumbSize(RenderStyle*, Element*) const; 147 148 virtual int popupInternalPaddingLeft(RenderStyle*) const { return 0; } 149 virtual int popupInternalPaddingRight(RenderStyle*) const { return 0; } 150 virtual int popupInternalPaddingTop(RenderStyle*) const { return 0; } 151 virtual int popupInternalPaddingBottom(RenderStyle*) const { return 0; } 152 virtual bool popupOptionSupportsTextIndent() const { return false; } 153 154 virtual ScrollbarControlSize scrollbarControlSizeForPart(ControlPart) { return RegularScrollbar; } 155 156 // Method for painting the caps lock indicator 157 virtual bool paintCapsLockIndicator(RenderObject*, const PaintInfo&, const IntRect&) { return 0; }; 158 159 // Returns the repeat interval of the animation for the progress bar. 160 virtual double animationRepeatIntervalForProgressBar(RenderProgress*) const; 161 // Returns the duration of the animation for the progress bar. 162 virtual double animationDurationForProgressBar(RenderProgress*) const; 163 164 // Media controls 165 virtual String formatMediaControlsTime(float time) const; 166 virtual String formatMediaControlsCurrentTime(float currentTime, float duration) const; 167 168 virtual IntSize meterSizeForBounds(const RenderMeter*, const IntRect&) const; 169 virtual bool supportsMeter(ControlPart) const; 170 171 // Returns size of one slider tick mark for a horizontal track. 172 // For vertical tracks we rotate it and use it. i.e. Width is always length along the track. 173 virtual IntSize sliderTickSize() const = 0; 174 // Returns the distance of slider tick origin from the slider track center. 175 virtual int sliderTickOffsetFromTrackCenter() const = 0; 176 void paintSliderTicks(RenderObject*, const PaintInfo&, const IntRect&); 177 178 virtual bool shouldShowPlaceholderWhenFocused() const { return false; } 179 virtual bool shouldHaveSpinButton(HTMLInputElement*) const; 180 181 // Functions for <select> elements. 182 virtual bool delegatesMenuListRendering() const { return false; } 183 virtual bool popsMenuByArrowKeys() const { return false; } 184 virtual bool popsMenuBySpaceKey() const { return false; } 185 virtual bool popsMenuByReturnKey() const { return false; } 186 virtual bool popsMenuByAltDownUpOrF4Key() const { return false; } 187 188 virtual String fileListNameForWidth(Locale&, const FileList*, const Font&, int width) const; 189 190 virtual bool shouldOpenPickerWithF4Key() const; 191 192 virtual bool supportsSelectionForegroundColors() const { return true; } 193 194 virtual bool isModalColorChooser() const { return true; } 195 196 protected: 197 // The platform selection color. 198 virtual Color platformActiveSelectionBackgroundColor() const; 199 virtual Color platformInactiveSelectionBackgroundColor() const; 200 virtual Color platformActiveSelectionForegroundColor() const; 201 virtual Color platformInactiveSelectionForegroundColor() const; 202 203 virtual Color platformActiveListBoxSelectionBackgroundColor() const; 204 virtual Color platformInactiveListBoxSelectionBackgroundColor() const; 205 virtual Color platformActiveListBoxSelectionForegroundColor() const; 206 virtual Color platformInactiveListBoxSelectionForegroundColor() const; 207 208 // A method asking if the theme is able to draw the focus ring. 209 virtual bool supportsFocusRing(const RenderStyle*) const; 210 211 #if !USE(NEW_THEME) 212 // Methods for each appearance value. 213 virtual void adjustCheckboxStyle(RenderStyle*, Element*) const; 214 virtual bool paintCheckbox(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 215 virtual void setCheckboxSize(RenderStyle*) const { } 216 217 virtual void adjustRadioStyle(RenderStyle*, Element*) const; 218 virtual bool paintRadio(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 219 virtual void setRadioSize(RenderStyle*) const { } 220 221 virtual void adjustButtonStyle(RenderStyle*, Element*) const; 222 virtual bool paintButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 223 224 virtual void adjustInnerSpinButtonStyle(RenderStyle*, Element*) const; 225 virtual bool paintInnerSpinButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 226 #endif 227 228 virtual bool paintTextField(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 229 230 virtual bool paintTextArea(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 231 232 virtual void adjustMenuListStyle(RenderStyle*, Element*) const; 233 virtual bool paintMenuList(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 234 235 virtual void adjustMenuListButtonStyle(RenderStyle*, Element*) const; 236 virtual bool paintMenuListButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 237 238 virtual bool paintMeter(RenderObject*, const PaintInfo&, const IntRect&); 239 240 virtual bool paintProgressBar(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 241 242 virtual bool paintSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 243 244 virtual void adjustSliderThumbStyle(RenderStyle*, Element*) const; 245 virtual bool paintSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 246 247 virtual void adjustSearchFieldStyle(RenderStyle*, Element*) const; 248 virtual bool paintSearchField(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 249 250 virtual void adjustSearchFieldCancelButtonStyle(RenderStyle*, Element*) const; 251 virtual bool paintSearchFieldCancelButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 252 253 virtual void adjustSearchFieldDecorationStyle(RenderStyle*, Element*) const; 254 virtual bool paintSearchFieldDecoration(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 255 256 virtual void adjustSearchFieldResultsDecorationStyle(RenderStyle*, Element*) const; 257 virtual bool paintSearchFieldResultsDecoration(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 258 259 virtual bool paintMediaFullscreenButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 260 virtual bool paintMediaPlayButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 261 virtual bool paintMediaOverlayPlayButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 262 virtual bool paintMediaMuteButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 263 virtual bool paintMediaSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 264 virtual bool paintMediaSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 265 virtual bool paintMediaVolumeSliderContainer(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 266 virtual bool paintMediaVolumeSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 267 virtual bool paintMediaVolumeSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 268 virtual bool paintMediaToggleClosedCaptionsButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 269 virtual bool paintMediaCastButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }; 270 virtual bool paintMediaControlsBackground(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 271 virtual bool paintMediaCurrentTime(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 272 virtual bool paintMediaTimeRemaining(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 273 virtual bool paintMediaFullScreenVolumeSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 274 virtual bool paintMediaFullScreenVolumeSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; } 275 276 virtual bool shouldUseFallbackTheme(RenderStyle*) const; 277 void adjustStyleUsingFallbackTheme(RenderStyle*, Element*); 278 bool paintUsingFallbackTheme(RenderObject*, const PaintInfo&, const IntRect&); 279 void adjustCheckboxStyleUsingFallbackTheme(RenderStyle*, Element*) const; 280 bool paintCheckboxUsingFallbackTheme(RenderObject*, const PaintInfo&, const IntRect&); 281 void adjustRadioStyleUsingFallbackTheme(RenderStyle*, Element*) const; 282 bool paintRadioUsingFallbackTheme(RenderObject*, const PaintInfo&, const IntRect&); 283 284 public: 285 // Methods for state querying 286 ControlStates controlStatesForRenderer(const RenderObject* o) const; 287 bool isActive(const RenderObject*) const; 288 bool isChecked(const RenderObject*) const; 289 bool isIndeterminate(const RenderObject*) const; 290 bool isEnabled(const RenderObject*) const; 291 bool isFocused(const RenderObject*) const; 292 bool isPressed(const RenderObject*) const; 293 bool isSpinUpButtonPartPressed(const RenderObject*) const; 294 bool isHovered(const RenderObject*) const; 295 bool isSpinUpButtonPartHovered(const RenderObject*) const; 296 bool isReadOnlyControl(const RenderObject*) const; 297 298 private: 299 Color m_customFocusRingColor; 300 bool m_hasCustomFocusRingColor; 301 302 // This color is expected to be drawn on a semi-transparent overlay, 303 // making it more transparent than its alpha value indicates. 304 static const RGBA32 defaultTapHighlightColor = 0x66000000; 305 306 static const RGBA32 defaultCompositionBackgroundColor = 0xFFFFDD55; 307 308 #if USE(NEW_THEME) 309 Theme* m_platformTheme; // The platform-specific theme. 310 #endif 311 }; 312 313 } // namespace blink 314 315 #endif // RenderTheme_h 316
