/* * Copyright (C) 2005-2017 Apple Inc. All rights reserved. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public License * along with this library; see the file COPYING.LIB. If not, write to * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301, USA. * */ #pragma once #include "ColorHash.h" #include "ControlStates.h" #include "GraphicsContext.h" #include "PaintInfo.h" #include "PopupMenuStyle.h" #include "ScrollTypes.h" #include "StyleColor.h" #include "ThemeTypes.h" #include namespace WebCore { class BorderData; class Element; class FileList; class FillLayer; class HTMLInputElement; class HTMLMeterElement; class Icon; class Page; class RenderAttachment; class RenderBox; class RenderMeter; class RenderObject; class RenderProgress; class RenderStyle; class Settings; class RenderTheme { protected: RenderTheme(); virtual ~RenderTheme() = default; public: // This function is to be implemented in platform-specific theme implementations to hand back the // appropriate platform theme. WEBCORE_EXPORT static RenderTheme& singleton(); virtual void purgeCaches(); // This method is called whenever style has been computed for an element and the appearance // property has been set to a value other than "none". The theme should map in all of the appropriate // metrics and defaults given the contents of the style. This includes sophisticated operations like // selection of control size based off the font, the disabling of appearance when certain other properties like // "border" are set, or if the appearance is not supported by the theme. void adjustStyle(RenderStyle&, const Element*, const RenderStyle* userAgentAppearanceStyle); // This method is called to paint the widget as a background of the RenderObject. A widget's foreground, e.g., the // text of a button, is always rendered by the engine itself. The boolean return value indicates // whether the CSS border/background should also be painted. bool paint(const RenderBox&, ControlStates&, const PaintInfo&, const LayoutRect&); bool paintBorderOnly(const RenderBox&, const PaintInfo&, const LayoutRect&); void paintDecorations(const RenderBox&, const PaintInfo&, const LayoutRect&); // The remaining methods should be implemented by the platform-specific portion of the theme, e.g., // RenderThemeMac.cpp for Mac OS X. // These methods return the theme's extra style sheets rules, to let each platform // adjust the default CSS rules in html.css, quirks.css, mediaControls.css, or plugIns.css virtual String extraDefaultStyleSheet() { return String(); } virtual String extraQuirksStyleSheet() { return String(); } virtual String extraPlugInsStyleSheet() { return String(); } #if ENABLE(VIDEO) virtual String mediaControlsStyleSheet() { return String(); } virtual String extraMediaControlsStyleSheet() { return String(); } virtual Vector mediaControlsScripts() { return { }; } #if ENABLE(MODERN_MEDIA_CONTROLS) virtual String mediaControlsBase64StringForIconNameAndType(const String&, const String&) { return String(); } virtual String mediaControlsFormattedStringForDuration(double) { return String(); } #endif // ENABLE(MODERN_MEDIA_CONTROLS) #endif // ENABLE(VIDEO) #if ENABLE(FULLSCREEN_API) virtual String extraFullScreenStyleSheet() { return String(); } #endif #if ENABLE(DATALIST_ELEMENT) String dataListStyleSheet() const; #endif #if ENABLE(INPUT_TYPE_COLOR) virtual String colorInputStyleSheet(const Settings&) const; #endif virtual LayoutRect adjustedPaintRect(const RenderBox&, const LayoutRect& paintRect) const { return paintRect; } // A method to obtain the baseline position for a "leaf" control. This will only be used if a baseline // position cannot be determined by examining child content. Checkboxes and radio buttons are examples of // controls that need to do this. virtual int baselinePosition(const RenderBox&) const; // A method for asking if a control is a container or not. Leaf controls have to have some special behavior (like // the baseline position API above). bool isControlContainer(ControlPart) const; // A method asking if the control changes its tint when the window has focus or not. virtual bool controlSupportsTints(const RenderObject&) const { return false; } // Whether or not the control has been styled enough by the author to disable the native appearance. virtual bool isControlStyled(const RenderStyle&, const RenderStyle& userAgentStyle) const; // A general method asking if any control tinting is supported at all. virtual bool supportsControlTints() const { return false; } // Some controls may spill out of their containers (e.g., the check on an OS X checkbox). When these controls repaint, // the theme needs to communicate this inflated rect to the engine so that it can invalidate the whole control. virtual void adjustRepaintRect(const RenderObject&, FloatRect&); // This method is called whenever a relevant state changes on a particular themed object, e.g., the mouse becomes pressed // or a control becomes disabled. virtual bool stateChanged(const RenderObject&, ControlStates::States) const; // This method is called whenever the theme changes on the system in order to flush cached resources from the // old theme. virtual void themeChanged() { } // A method asking if the theme is able to draw the focus ring. virtual bool supportsFocusRing(const RenderStyle&) const; // A method asking if the theme's controls actually care about redrawing when hovered. virtual bool supportsHover(const RenderStyle&) const { return false; } // A method asking if the platform is able to show datalist suggestions for a given input type. virtual bool supportsDataListUI(const AtomString&) const { return false; } virtual bool supportsBoxShadow(const RenderStyle&) const { return false; } // Text selection colors. Color activeSelectionBackgroundColor(OptionSet) const; Color inactiveSelectionBackgroundColor(OptionSet) const; virtual Color transformSelectionBackgroundColor(const Color&, OptionSet) const; Color activeSelectionForegroundColor(OptionSet) const; Color inactiveSelectionForegroundColor(OptionSet) const; // List box selection colors Color activeListBoxSelectionBackgroundColor(OptionSet) const; Color activeListBoxSelectionForegroundColor(OptionSet) const; Color inactiveListBoxSelectionBackgroundColor(OptionSet) const; Color inactiveListBoxSelectionForegroundColor(OptionSet) const; // Highlighting color for search matches. Color textSearchHighlightColor(OptionSet) const; #if ENABLE(APP_HIGHLIGHTS) // Default highlighting color for app highlights. Color appHighlightColor(OptionSet) const; #endif Color defaultButtonTextColor(OptionSet) const; Color datePlaceholderTextColor(const Color& textColor, const Color& backgroundColor) const; virtual Color disabledTextColor(const Color& textColor, const Color& backgroundColor) const; WEBCORE_EXPORT Color focusRingColor(OptionSet) const; virtual Color platformFocusRingColor(OptionSet) const { return Color::black; } static void setCustomFocusRingColor(const Color&); static float platformFocusRingWidth() { return 3; } static float platformFocusRingOffset(float outlineWidth) { return std::max(outlineWidth - platformFocusRingWidth(), 0); } #if ENABLE(TOUCH_EVENTS) static Color tapHighlightColor(); virtual Color platformTapHighlightColor() const; #endif virtual void platformColorsDidChange(); virtual Seconds caretBlinkInterval() const { return 500_ms; } // System fonts and colors for CSS. void systemFont(CSSValueID, FontCascadeDescription&) const; virtual Color systemColor(CSSValueID, OptionSet) const; virtual int minimumMenuListSize(const RenderStyle&) const { return 0; } virtual void adjustSliderThumbSize(RenderStyle&, const Element*) const; virtual LengthBox popupInternalPaddingBox(const RenderStyle&, const Settings&) const { return { 0, 0, 0, 0 }; } virtual bool popupOptionSupportsTextIndent() const { return false; } virtual PopupMenuStyle::PopupMenuSize popupMenuSize(const RenderStyle&, IntRect&) const { return PopupMenuStyle::PopupMenuSizeNormal; } virtual ScrollbarControlSize scrollbarControlSizeForPart(ControlPart) { return ScrollbarControlSize::Regular; } // Returns the repeat interval of the animation for the progress bar. virtual Seconds animationRepeatIntervalForProgressBar(const RenderProgress&) const; // Returns the duration of the animation for the progress bar. virtual Seconds animationDurationForProgressBar(const RenderProgress&) const; virtual IntRect progressBarRectForBounds(const RenderObject&, const IntRect&) const; #if ENABLE(VIDEO) // Media controls virtual bool supportsClosedCaptioning() const { return false; } virtual bool hasOwnDisabledStateHandlingFor(ControlPart) const { return false; } virtual bool usesMediaControlStatusDisplay() { return false; } virtual bool usesMediaControlVolumeSlider() const { return true; } virtual bool usesVerticalVolumeSlider() const { return true; } virtual double mediaControlsFadeInDuration() { return 0.1; } virtual Seconds mediaControlsFadeOutDuration() { return 300_ms; } virtual String formatMediaControlsTime(float time) const; virtual String formatMediaControlsCurrentTime(float currentTime, float duration) const; virtual String formatMediaControlsRemainingTime(float currentTime, float duration) const; // Returns the media volume slider container's offset from the mute button. virtual LayoutPoint volumeSliderOffsetFromMuteButton(const RenderBox&, const LayoutSize&) const; #endif virtual IntSize meterSizeForBounds(const RenderMeter&, const IntRect&) const; virtual bool supportsMeter(ControlPart, const HTMLMeterElement&) const; #if ENABLE(DATALIST_ELEMENT) // Returns the threshold distance for snapping to a slider tick mark. virtual LayoutUnit sliderTickSnappingThreshold() const; // Returns size of one slider tick mark for a horizontal track. // For vertical tracks we rotate it and use it. i.e. Width is always length along the track. virtual IntSize sliderTickSize() const = 0; // Returns the distance of slider tick origin from the slider track center. virtual int sliderTickOffsetFromTrackCenter() const = 0; virtual void paintSliderTicks(const RenderObject&, const PaintInfo&, const FloatRect&); #endif virtual bool shouldHaveSpinButton(const HTMLInputElement&) const; virtual bool shouldHaveCapsLockIndicator(const HTMLInputElement&) const; // Functions for