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author | Steve Block <steveblock@google.com> | 2011-05-06 11:45:16 +0100 |
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committer | Steve Block <steveblock@google.com> | 2011-05-12 13:44:10 +0100 |
commit | cad810f21b803229eb11403f9209855525a25d57 (patch) | |
tree | 29a6fd0279be608e0fe9ffe9841f722f0f4e4269 /Source/WebCore/platform/Theme.h | |
parent | 121b0cf4517156d0ac5111caf9830c51b69bae8f (diff) | |
download | external_webkit-cad810f21b803229eb11403f9209855525a25d57.zip external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.gz external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.bz2 |
Merge WebKit at r75315: Initial merge by git.
Change-Id: I570314b346ce101c935ed22a626b48c2af266b84
Diffstat (limited to 'Source/WebCore/platform/Theme.h')
-rw-r--r-- | Source/WebCore/platform/Theme.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/Source/WebCore/platform/Theme.h b/Source/WebCore/platform/Theme.h new file mode 100644 index 0000000..f211576 --- /dev/null +++ b/Source/WebCore/platform/Theme.h @@ -0,0 +1,122 @@ +/* + * Copyright (C) 2008 Apple Inc. All Rights Reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef Theme_h +#define Theme_h + +#include "Color.h" +#include "Font.h" +#include "IntRect.h" +#include "LengthBox.h" +#include "LengthSize.h" +#include "PlatformString.h" +#include "ThemeTypes.h" + +namespace WebCore { + +class GraphicsContext; +class ScrollView; + +// Unlike other platform classes, Theme does extensively use virtual functions. This design allows a platform to switch between multiple themes at runtime. +class Theme { +public: + Theme() { } + virtual ~Theme() { } + + // A method to obtain the baseline position adjustment 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. The adjustment is an offset that adds to the baseline, e.g., marginTop() + height() + |offset|. + // The offset is not zoomed. + virtual int baselinePositionAdjustment(ControlPart) const { return 0; } + + // A method asking if the control changes its appearance when the window is inactive. + virtual bool controlHasInactiveAppearance(ControlPart) const { return false; } + + // General methods for whether or not any of the controls in the theme change appearance when the window is inactive or + // when hovered over. + virtual bool controlsCanHaveInactiveAppearance() const { return false; } + virtual bool controlsCanHaveHoveredAppearance() const { return false; } + + // Used by RenderTheme::isControlStyled to figure out if the native look and feel should be turned off. + virtual bool controlDrawsBorder(ControlPart) const { return true; } + virtual bool controlDrawsBackground(ControlPart) const { return true; } + virtual bool controlDrawsFocusOutline(ControlPart) const { return true; } + + // Methods for obtaining platform-specific colors. + virtual Color selectionColor(ControlPart, ControlState, SelectionPart) const { return Color(); } + virtual Color textSearchHighlightColor() const { return Color(); } + + // CSS system colors and fonts + virtual Color systemColor(ThemeColor) const { return Color(); } + virtual Font systemFont(ThemeFont, FontDescription&) const { return Font(); } + + // How fast the caret blinks in text fields. + virtual double caretBlinkInterval() const { return 0.5; } + + // Notification when the theme has changed + virtual void themeChanged() { } + + // Methods used to adjust the RenderStyles of controls. + + // The font description result should have a zoomed font size. + virtual FontDescription controlFont(ControlPart, const Font& font, float /*zoomFactor*/) const { return font.fontDescription(); } + + // The size here is in zoomed coordinates already. If a new size is returned, it also needs to be in zoomed coordinates. + virtual LengthSize controlSize(ControlPart, const Font&, const LengthSize& zoomedSize, float /*zoomFactor*/) const { return zoomedSize; } + + // Returns the minimum size for a control in zoomed coordinates. + virtual LengthSize minimumControlSize(ControlPart, const Font&, float /*zoomFactor*/) const { return LengthSize(Length(0, Fixed), Length(0, Fixed)); } + + // Allows the theme to modify the existing padding/border. + virtual LengthBox controlPadding(ControlPart, const Font&, const LengthBox& zoomedBox, float zoomFactor) const; + virtual LengthBox controlBorder(ControlPart, const Font&, const LengthBox& zoomedBox, float zoomFactor) const; + + // Whether or not whitespace: pre should be forced on always. + virtual bool controlRequiresPreWhiteSpace(ControlPart) const { return false; } + + // Method for painting a control. The rect is in zoomed coordinates. + virtual void paint(ControlPart, ControlStates, GraphicsContext*, const IntRect& /*zoomedRect*/, float /*zoomFactor*/, ScrollView*) const { } + + // 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. + // The rect passed in is in zoomed coordinates, so the inflation should take that into account and make sure the inflation + // amount is also scaled by the zoomFactor. + virtual void inflateControlPaintRect(ControlPart, ControlStates, IntRect& /*zoomedRect*/, float /*zoomFactor*/) const { } + + // This method is called once, from RenderTheme::adjustDefaultStyleSheet(), to let each platform adjust + // the default CSS rules in html.css. + static String defaultStyleSheet(); + +private: + mutable Color m_activeSelectionColor; + mutable Color m_inactiveSelectionColor; +}; + +// Function to obtain the theme. This is implemented in the platform-specific subclasses. +Theme* platformTheme(); + +} // namespace WebCore + +#endif // Theme_h |