--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/WebCore/rendering/RenderTheme.h Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,199 @@
+/*
+ * This file is part of the theme implementation for form controls in WebCore.
+ *
+ * Copyright (C) 2005 Apple Computer, Inc.
+ *
+ * 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.
+ *
+ */
+
+#ifndef RenderTheme_h
+#define RenderTheme_h
+
+#include "RenderObject.h"
+
+namespace WebCore {
+
+class Element;
+class PopupMenu;
+class RenderMenuList;
+
+enum ControlState {
+ HoverState,
+ PressedState,
+ FocusState,
+ EnabledState,
+ CheckedState,
+ ReadOnlyState
+};
+
+class RenderTheme {
+public:
+ RenderTheme() { }
+ virtual ~RenderTheme() { }
+
+ // 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(CSSStyleSelector*, RenderStyle*, Element*, bool UAHasAppearance,
+ const BorderData&, const BackgroundLayer&, const Color& backgroundColor);
+
+ // 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(RenderObject*, const RenderObject::PaintInfo&, const IntRect&);
+ bool paintBorderOnly(RenderObject*, const RenderObject::PaintInfo&, const IntRect&);
+ bool paintDecorations(RenderObject*, const RenderObject::PaintInfo&, const IntRect&);
+
+ // The remaining methods should be implemented by the platform-specific portion of the theme, e.g.,
+ // RenderThemeMac.cpp for Mac OS X.
+
+ // 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 short baselinePosition(const RenderObject*) 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).
+ virtual bool isControlContainer(EAppearance) 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 BorderData&, const BackgroundLayer&, const Color& backgroundColor) 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*, IntRect&) { }
+
+ // 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(RenderObject*, ControlState) 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; }
+
+ // The selection color.
+ Color activeSelectionBackgroundColor() const;
+ Color inactiveSelectionBackgroundColor() const;
+
+ // The platform selection color.
+ virtual Color platformActiveSelectionBackgroundColor() const;
+ virtual Color platformInactiveSelectionBackgroundColor() const;
+ virtual Color platformActiveSelectionForegroundColor() const;
+ virtual Color platformInactiveSelectionForegroundColor() const;
+
+ // List Box selection color
+ virtual Color activeListBoxSelectionBackgroundColor() const;
+ virtual Color activeListBoxSelectionForegroundColor() const;
+ virtual Color inactiveListBoxSelectionBackgroundColor() const;
+ virtual Color inactiveListBoxSelectionForegroundColor() const;
+
+ void platformColorsDidChange();
+
+ // System fonts.
+ virtual void systemFont(int propId, FontDescription&) const = 0;
+
+ virtual int minimumMenuListSize(RenderStyle*) const { return 0; }
+
+ virtual void adjustSliderThumbSize(RenderObject*) const;
+
+ // Methods for state querying
+ bool isChecked(const RenderObject*) const;
+ bool isIndeterminate(const RenderObject*) const;
+ bool isEnabled(const RenderObject*) const;
+ bool isFocused(const RenderObject*) const;
+ bool isPressed(const RenderObject*) const;
+ bool isHovered(const RenderObject*) const;
+ bool isReadOnlyControl(const RenderObject*) const;
+
+ virtual int popupInternalPaddingLeft(RenderStyle*) const { return 0; }
+ virtual int popupInternalPaddingRight(RenderStyle*) const { return 0; }
+ virtual int popupInternalPaddingTop(RenderStyle*) const { return 0; }
+ virtual int popupInternalPaddingBottom(RenderStyle*) const { return 0; }
+
+protected:
+ // Methods for each appearance value.
+ virtual void adjustCheckboxStyle(CSSStyleSelector*, RenderStyle*, Element*) const;
+ virtual bool paintCheckbox(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; }
+ virtual void setCheckboxSize(RenderStyle*) const { }
+
+ virtual void adjustRadioStyle(CSSStyleSelector*, RenderStyle*, Element*) const;
+ virtual bool paintRadio(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; }
+ virtual void setRadioSize(RenderStyle*) const { }
+
+ virtual void adjustButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const;
+ virtual bool paintButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; }
+ virtual void setButtonSize(RenderStyle*) const { }
+
+ virtual void adjustTextFieldStyle(CSSStyleSelector*, RenderStyle*, Element*) const;
+ virtual bool paintTextField(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; }
+
+ virtual void adjustTextAreaStyle(CSSStyleSelector*, RenderStyle*, Element*) const;
+ virtual bool paintTextArea(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; }
+
+ virtual void adjustMenuListStyle(CSSStyleSelector*, RenderStyle*, Element*) const;
+ virtual bool paintMenuList(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; }
+
+ virtual void adjustMenuListButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const;
+ virtual bool paintMenuListButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; }
+
+ virtual void adjustSliderTrackStyle(CSSStyleSelector*, RenderStyle*, Element*) const;
+ virtual bool paintSliderTrack(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; }
+
+ virtual void adjustSliderThumbStyle(CSSStyleSelector*, RenderStyle*, Element*) const;
+ virtual bool paintSliderThumb(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; }
+
+ virtual void adjustSearchFieldStyle(CSSStyleSelector*, RenderStyle*, Element*) const;
+ virtual bool paintSearchField(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; }
+
+ virtual void adjustSearchFieldCancelButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const;
+ virtual bool paintSearchFieldCancelButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; }
+
+ virtual void adjustSearchFieldDecorationStyle(CSSStyleSelector*, RenderStyle*, Element*) const;
+ virtual bool paintSearchFieldDecoration(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; }
+
+ virtual void adjustSearchFieldResultsDecorationStyle(CSSStyleSelector*, RenderStyle*, Element*) const;
+ virtual bool paintSearchFieldResultsDecoration(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; }
+
+ virtual void adjustSearchFieldResultsButtonStyle(CSSStyleSelector*, RenderStyle*, Element*) const;
+ virtual bool paintSearchFieldResultsButton(RenderObject*, const RenderObject::PaintInfo&, const IntRect&) { return true; }
+
+private:
+ mutable Color m_activeSelectionColor;
+ mutable Color m_inactiveSelectionColor;
+};
+
+// Function to obtain the theme. This is implemented in your platform-specific theme implementation to hand
+// back the appropriate platform theme.
+RenderTheme* theme();
+
+} // namespace WebCore
+
+#endif // RenderTheme_h