1 /* 2 * This file is part of the theme implementation for form controls in WebCore. 3 * 4 * Copyright (C) 2005, 2006, 2007, 2008 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 "Theme.h" 28 #else 29 #include "ThemeTypes.h" 30 #endif 31 #include "RenderObject.h" 32 #include "RenderTheme.h" 33 #include "ScrollTypes.h" 34 #include <wtf/PassRefPtr.h> 35 #include <wtf/RefCounted.h> 36 37 namespace WebCore { 38 39 class Element; 40 class PopupMenu; 41 class RenderMenuList; 42 class CSSStyleSheet; 43 44 class RenderTheme : public RefCounted<RenderTheme> { 45 protected: 46 RenderTheme(); 47 48 public: 49 virtual ~RenderTheme() { } 50 51 // This function is to be implemented in your platform-specific theme implementation to hand back the 52 // appropriate platform theme. When the theme is needed in non-page dependent code, a default theme is 53 // used as fallback, which is returned for a nulled page, so the platform code needs to account for this. 54 static PassRefPtr<RenderTheme> themeForPage(Page* page); 55 56 // When the theme is needed in non-page dependent code, the defaultTheme() is used as fallback. 57 static inline PassRefPtr<RenderTheme> defaultTheme() 58 { 59 return themeForPage(0); 60 }; 61 62 // This method is called whenever style has been computed for an element and the appearance 63 // property has been set to a value other than "none". The theme should map in all of the appropriate 64 // metrics and defaults given the contents of the style. This includes sophisticated operations like 65 // selection of control size based off the font, the disabling of appearance when certain other properties like 66 // "border" are set, or if the appearance is not supported by the theme. 67 void adjustStyle(CSSStyleSelector*, RenderStyle*, Element*, bool UAHasAppearance, 68 const BorderData&, const FillLayer&, const Color& backgroundColor); 69 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 RenderObject::PaintInfo&, const IntRect&); 74 bool paintBorderOnly(RenderObject*, const RenderObject::PaintInfo&, const IntRect&); 75 bool paintDecorations(RenderObject*, const RenderObject::PaintInfo&, const IntRect&); 76 77 // The remaining methods should be implemented by the platform-specific portion of the theme, e.g., 78 // RenderThemeMac.cpp for Mac OS X. 79 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() { return String(); } 83 virtual String extraQuirksStyleSheet() { return String(); } 84 #if ENABLE(VIDEO) 85 virtual String extraMediaControlsStyleSheet() { return String(); }; 86 #endif 87 88 // A method to obtain the baseline position for a "leaf" control. This will only be used if a baseline 89 // position cannot be determined by examining child content. Checkboxes and radio buttons are examples of 90 // controls that need to do this. 91 virtual int baselinePosition(const RenderObject*) const; 92 93 // A method for asking if a control is a container or not. Leaf controls have to have some special behavior (like 94 // the baseline position API above). 95 bool isControlContainer(ControlPart) const; 96 97 // A method asking if the control changes its tint when the window has focus or not. 98 virtual bool controlSupportsTints(const RenderObject*) const { return false; } 99 100 // Whether or not the control has been styled enough by the author to disable the native appearance. 101 virtual bool isControlStyled(const RenderStyle*, const BorderData&, const FillLayer&, const Color& backgroundColor) const; 102 103 // A general method asking if any control tinting is supported at all. 104 virtual bool supportsControlTints() const { return false; } 105 106 // Some controls may spill out of their containers (e.g., the check on an OS X checkbox). When these controls repaint, 107 // the theme needs to communicate this inflated rect to the engine so that it can invalidate the whole control. 108 virtual void adjustRepaintRect(const RenderObject*, IntRect&); 109 110 // This method is called whenever a relevant state changes on a particular themed object, e.g., the mouse becomes pressed 111 // or a control becomes disabled. 112 virtual bool stateChanged(RenderObject*, ControlState) const; 113 114 // This method is called whenever the theme changes on the system in order to flush cached resources from the 115 // old theme. 116 virtual void themeChanged() { } 117 118 // A method asking if the theme is able to draw the focus ring. 119 virtual bool supportsFocusRing(const RenderStyle*) const; 120 121 // A method asking if the theme's controls actually care about redrawing when hovered. 122 virtual bool supportsHover(const RenderStyle*) const { return false; } 123 124 // Text selection colors. 125 Color activeSelectionBackgroundColor() const; 126 Color inactiveSelectionBackgroundColor() const; 127 Color activeSelectionForegroundColor() const; 128 Color inactiveSelectionForegroundColor() const; 129 130 // List box selection colors 131 Color activeListBoxSelectionBackgroundColor() const; 132 Color activeListBoxSelectionForegroundColor() const; 133 Color inactiveListBoxSelectionBackgroundColor() const; 134 Color inactiveListBoxSelectionForegroundColor() const; 135 136 // Highlighting colors for TextMatches. 137 virtual Color platformActiveTextSearchHighlightColor() const; 138 virtual Color platformInactiveTextSearchHighlightColor() const; 139 140 static Color focusRingColor(); 141 virtual Color platformFocusRingColor() const { return Color(0, 0, 0); } 142 static void setCustomFocusRingColor(const Color&); 143 144 virtual void platformColorsDidChange(); 145 146 virtual double caretBlinkInterval() const { return 0.5; } 147 148 // System fonts and colors for CSS. 149 virtual void systemFont(int cssValueId, FontDescription&) const = 0; 150 virtual Color systemColor(int cssValueId) const; 151 152 virtual int minimumMenuListSize(RenderStyle*) const { return 0; } 153 154 virtual void adjustSliderThumbSize(RenderObject*) const; 155 156 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; } 161 162 virtual int buttonInternalPaddingLeft() const { return 0; } 163 virtual int buttonInternalPaddingRight() const { return 0; } 164 virtual int buttonInternalPaddingTop() const { return 0; } 165 virtual int buttonInternalPaddingBottom() const { return 0; } 166 167 virtual ScrollbarControlSize scrollbarControlSizeForPart(ControlPart) { return RegularScrollbar; } 168 169 // Method for painting the caps lock indicator 170 virtual bool paintCapsLockIndicator(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return 0; }; 171 172 #if ENABLE(VIDEO) 173 // Media controls 174 virtual bool hitTestMediaControlPart(RenderObject*, const IntPoint& absPoint); 175 virtual bool shouldRenderMediaControlPart(ControlPart, Element*); 176 virtual double mediaControlsFadeInDuration() { return 0.1; } 177 virtual double mediaControlsFadeOutDuration() { return 0.3; } 178 virtual String formatMediaControlsTime(float time) const; 179 virtual String formatMediaControlsCurrentTime(float currentTime, float duration) const; 180 virtual String formatMediaControlsRemainingTime(float currentTime, float duration) const; 181 #endif 182 183 protected: 184 // The platform selection color. 185 virtual Color platformActiveSelectionBackgroundColor() const; 186 virtual Color platformInactiveSelectionBackgroundColor() const; 187 virtual Color platformActiveSelectionForegroundColor() const; 188 virtual Color platformInactiveSelectionForegroundColor() const; 189 190 virtual Color platformActiveListBoxSelectionBackgroundColor() const; 191 virtual Color platformInactiveListBoxSelectionBackgroundColor() const; 192 virtual Color platformActiveListBoxSelectionForegroundColor() const; 193 virtual Color platformInactiveListBoxSelectionForegroundColor() const; 194 195 virtual bool supportsSelectionForegroundColors() const { return true; } 196 virtual bool supportsListBoxSelectionForegroundColors() const { return true; } 197 198 #if !USE(NEW_THEME) 199 // Methods for each appearance value. 200 virtual void adjustCheckboxStyle(CSSStyleSelector*, RenderStyle*, Element*) const; 201 virtual bool paintCheckbox(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 202 virtual void setCheckboxSize(RenderStyle*) const { } 203 204 virtual void adjustRadioStyle(CSSStyleSelector*, RenderStyle*, Element*) const; 205 virtual bool paintRadio(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 206 virtual void setRadioSize(RenderStyle*) const { } 207 208 virtual void adjustButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const; 209 virtual bool paintButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 210 virtual void setButtonSize(RenderStyle*) const { } 211 212 virtual void adjustInnerSpinButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const; 213 virtual bool paintInnerSpinButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 214 virtual void adjustOuterSpinButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const; 215 virtual bool paintOuterSpinButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 216 #endif 217 218 virtual void adjustTextFieldStyle(CSSStyleSelector*, RenderStyle*, Element*) const; 219 virtual bool paintTextField(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 220 221 virtual void adjustTextAreaStyle(CSSStyleSelector*, RenderStyle*, Element*) const; 222 virtual bool paintTextArea(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 223 224 #ifdef ANDROID_LISTBOX_USES_MENU_LIST 225 virtual void adjustListboxStyle(CSSStyleSelector*, RenderStyle*, Element*) const {} 226 #endif 227 virtual void adjustMenuListStyle(CSSStyleSelector*, RenderStyle*, Element*) const; 228 virtual bool paintMenuList(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 229 230 virtual void adjustMenuListButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const; 231 virtual bool paintMenuListButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 232 233 virtual void adjustSliderTrackStyle(CSSStyleSelector*, RenderStyle*, Element*) const; 234 virtual bool paintSliderTrack(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 235 236 virtual void adjustSliderThumbStyle(CSSStyleSelector*, RenderStyle*, Element*) const; 237 virtual bool paintSliderThumb(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 238 239 virtual void adjustSearchFieldStyle(CSSStyleSelector*, RenderStyle*, Element*) const; 240 virtual bool paintSearchField(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 241 242 virtual void adjustSearchFieldCancelButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const; 243 virtual bool paintSearchFieldCancelButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 244 245 virtual void adjustSearchFieldDecorationStyle(CSSStyleSelector*, RenderStyle*, Element*) const; 246 virtual bool paintSearchFieldDecoration(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 247 248 virtual void adjustSearchFieldResultsDecorationStyle(CSSStyleSelector*, RenderStyle*, Element*) const; 249 virtual bool paintSearchFieldResultsDecoration(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 250 251 virtual void adjustSearchFieldResultsButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const; 252 virtual bool paintSearchFieldResultsButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 253 254 virtual bool paintMediaFullscreenButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 255 virtual bool paintMediaPlayButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 256 virtual bool paintMediaMuteButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 257 virtual bool paintMediaSeekBackButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 258 virtual bool paintMediaSeekForwardButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 259 virtual bool paintMediaSliderTrack(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 260 virtual bool paintMediaSliderThumb(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 261 virtual bool paintMediaVolumeSliderContainer(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 262 virtual bool paintMediaVolumeSliderTrack(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 263 virtual bool paintMediaVolumeSliderThumb(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 264 virtual bool paintMediaRewindButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 265 virtual bool paintMediaReturnToRealtimeButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 266 virtual bool paintMediaToggleClosedCaptionsButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 267 virtual bool paintMediaControlsBackground(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 268 virtual bool paintMediaCurrentTime(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 269 virtual bool paintMediaTimeRemaining(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; } 270 271 public: 272 // Methods for state querying 273 ControlStates controlStatesForRenderer(const RenderObject* o) const; 274 bool isActive(const RenderObject*) const; 275 bool isChecked(const RenderObject*) const; 276 bool isIndeterminate(const RenderObject*) const; 277 bool isEnabled(const RenderObject*) const; 278 bool isFocused(const RenderObject*) const; 279 bool isPressed(const RenderObject*) const; 280 bool isHovered(const RenderObject*) const; 281 bool isReadOnlyControl(const RenderObject*) const; 282 bool isDefault(const RenderObject*) const; 283 284 private: 285 mutable Color m_activeSelectionBackgroundColor; 286 mutable Color m_inactiveSelectionBackgroundColor; 287 mutable Color m_activeSelectionForegroundColor; 288 mutable Color m_inactiveSelectionForegroundColor; 289 290 mutable Color m_activeListBoxSelectionBackgroundColor; 291 mutable Color m_inactiveListBoxSelectionBackgroundColor; 292 mutable Color m_activeListBoxSelectionForegroundColor; 293 mutable Color m_inactiveListBoxSelectionForegroundColor; 294 295 #if USE(NEW_THEME) 296 Theme* m_theme; // The platform-specific theme. 297 #endif 298 }; 299 300 } // namespace WebCore 301 302 #endif // RenderTheme_h 303
