Split ThemePainter out of LayoutTheme

Source/core/paint/ThemePainter.cpp

+/**
+ * This file is part of the theme implementation for form controls in WebCore.
+ *
+ * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2012 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.
+ */
+
+#include "config.h"
+#include "core/paint/ThemePainter.h"
+
+#include "core/InputTypeNames.h"
+#include "core/html/HTMLDataListElement.h"
+#include "core/html/HTMLDataListOptionsCollection.h"
+#include "core/html/HTMLInputElement.h"
+#include "core/html/HTMLOptionElement.h"
+#include "core/html/parser/HTMLParserIdioms.h"
+#include "core/html/shadow/ShadowElementNames.h"
+#include "core/layout/LayoutMeter.h"
+#include "core/layout/LayoutTheme.h"
+#include "core/layout/LayoutView.h"
+#include "core/paint/PaintInfo.h"
+#include "core/style/ComputedStyle.h"
+#include "platform/graphics/GraphicsContextStateSaver.h"
+#include "public/platform/Platform.h"
+#include "public/platform/WebFallbackThemeEngine.h"
+#include "public/platform/WebRect.h"
+
+#if USE(NEW_THEME)
+#include "platform/Theme.h"
+#endif
+
+// The methods in this file are shared by all themes on every platform.
+
+namespace blink {
+
+static WebFallbackThemeEngine::State getWebFallbackThemeState(const LayoutObject* o)
+{
+    if (!LayoutTheme::isEnabled(o))
+        return WebFallbackThemeEngine::StateDisabled;
+    if (LayoutTheme::isPressed(o))
+        return WebFallbackThemeEngine::StatePressed;
+    if (LayoutTheme::isHovered(o))
+        return WebFallbackThemeEngine::StateHover;
+
+    return WebFallbackThemeEngine::StateNormal;
+}
+
+bool ThemePainter::paint(LayoutObject* o, const PaintInfo& paintInfo, const IntRect& r)
+{
+    ControlPart part = o->styleRef().appearance();
+
+    if (LayoutTheme::theme().shouldUseFallbackTheme(o->styleRef()))
+        return paintUsingFallbackTheme(o, paintInfo, r);
+
+#if USE(NEW_THEME)
+    switch (part) {
+    case CheckboxPart:
+    case RadioPart:
+    case PushButtonPart:
+    case SquareButtonPart:
+    case ButtonPart:
+    case InnerSpinButtonPart:
+        platformTheme()->paint(part, LayoutTheme::controlStatesForLayoutObject(o), const_cast<GraphicsContext*>(paintInfo.context), r, o->styleRef().effectiveZoom(), o->view()->frameView());
+        return false;
+    default:
+        break;
+    }
+#endif
+
+    // Call the appropriate paint method based off the appearance value.
+    switch (part) {
+#if !USE(NEW_THEME)
+    case CheckboxPart:
+        return paintCheckbox(o, paintInfo, r);
+    case RadioPart:
+        return paintRadio(o, paintInfo, r);
+    case PushButtonPart:
+    case SquareButtonPart:
+    case ButtonPart:
+        return paintButton(o, paintInfo, r);
+    case InnerSpinButtonPart:
+        return paintInnerSpinButton(o, paintInfo, r);
+#endif
+    case MenulistPart:
+        return paintMenuList(o, paintInfo, r);
+    case MeterPart:
+    case RelevancyLevelIndicatorPart:
+    case ContinuousCapacityLevelIndicatorPart:
+    case DiscreteCapacityLevelIndicatorPart:
+    case RatingLevelIndicatorPart:
+        return paintMeter(o, paintInfo, r);
+    case ProgressBarPart:
+        return paintProgressBar(o, paintInfo, r);
+    case SliderHorizontalPart:
+    case SliderVerticalPart:
+        return paintSliderTrack(o, paintInfo, r);
+    case SliderThumbHorizontalPart:
+    case SliderThumbVerticalPart:
+        return paintSliderThumb(o, paintInfo, r);
+    case MediaEnterFullscreenButtonPart:
+    case MediaExitFullscreenButtonPart:
+        return paintMediaFullscreenButton(o, paintInfo, r);
+    case MediaPlayButtonPart:
+        return paintMediaPlayButton(o, paintInfo, r);
+    case MediaOverlayPlayButtonPart:
+        return paintMediaOverlayPlayButton(o, paintInfo, r);
+    case MediaMuteButtonPart:
+        return paintMediaMuteButton(o, paintInfo, r);
+    case MediaToggleClosedCaptionsButtonPart:
+        return paintMediaToggleClosedCaptionsButton(o, paintInfo, r);
+    case MediaSliderPart:
+        return paintMediaSliderTrack(o, paintInfo, r);
+    case MediaSliderThumbPart:
+        return paintMediaSliderThumb(o, paintInfo, r);
+    case MediaVolumeSliderContainerPart:
+        return paintMediaVolumeSliderContainer(o, paintInfo, r);
+    case MediaVolumeSliderPart:
+        return paintMediaVolumeSliderTrack(o, paintInfo, r);
+    case MediaVolumeSliderThumbPart:
+        return paintMediaVolumeSliderThumb(o, paintInfo, r);
+    case MediaFullScreenVolumeSliderPart:
+        return paintMediaFullScreenVolumeSliderTrack(o, paintInfo, r);
+    case MediaFullScreenVolumeSliderThumbPart:
+        return paintMediaFullScreenVolumeSliderThumb(o, paintInfo, r);
+    case MediaTimeRemainingPart:
+        return paintMediaTimeRemaining(o, paintInfo, r);
+    case MediaCurrentTimePart:
+        return paintMediaCurrentTime(o, paintInfo, r);
+    case MediaControlsBackgroundPart:
+        return paintMediaControlsBackground(o, paintInfo, r);
+    case MediaCastOffButtonPart:
+        return paintMediaCastButton(o, paintInfo, r);
+    case MediaOverlayCastOffButtonPart:
+        return paintMediaCastButton(o, paintInfo, r);
+    case MenulistButtonPart:
+    case TextFieldPart:
+    case TextAreaPart:
+        return true;
+    case SearchFieldPart:
+        return paintSearchField(o, paintInfo, r);
+    case SearchFieldCancelButtonPart:
+        return paintSearchFieldCancelButton(o, paintInfo, r);
+    case SearchFieldDecorationPart:
+        return paintSearchFieldDecoration(o, paintInfo, r);
+    case SearchFieldResultsDecorationPart:
+        return paintSearchFieldResultsDecoration(o, paintInfo, r);
+    default:
+        break;
+    }
+
+    return true; // We don't support the appearance, so let the normal background/border paint.
+}
+
+bool ThemePainter::paintBorderOnly(LayoutObject* o, const PaintInfo& paintInfo, const IntRect& r)
+{
+    // Call the appropriate paint method based off the appearance value.
+    switch (o->style()->appearance()) {
+    case TextFieldPart:
+        return paintTextField(o, paintInfo, r);
+    case TextAreaPart:
+        return paintTextArea(o, paintInfo, r);
+    case MenulistButtonPart:
+    case SearchFieldPart:
+    case ListboxPart:
+        return true;
+    case CheckboxPart:
+    case RadioPart:
+    case PushButtonPart:
+    case SquareButtonPart:
+    case ButtonPart:
+    case MenulistPart:
+    case MeterPart:
+    case RelevancyLevelIndicatorPart:
+    case ContinuousCapacityLevelIndicatorPart:
+    case DiscreteCapacityLevelIndicatorPart:
+    case RatingLevelIndicatorPart:
+    case ProgressBarPart:
+    case SliderHorizontalPart:
+    case SliderVerticalPart:
+    case SliderThumbHorizontalPart:
+    case SliderThumbVerticalPart:
+    case SearchFieldCancelButtonPart:
+    case SearchFieldDecorationPart:
+    case SearchFieldResultsDecorationPart:
+    default:
+        break;
+    }
+
+    return false;
+}
+
+bool ThemePainter::paintDecorations(LayoutObject* o, const PaintInfo& paintInfo, const IntRect& r)
+{
+    // Call the appropriate paint method based off the appearance value.
+    switch (o->style()->appearance()) {
+    case MenulistButtonPart:
+        return paintMenuListButton(o, paintInfo, r);
+    case TextFieldPart:
+    case TextAreaPart:
+    case CheckboxPart:
+    case RadioPart:
+    case PushButtonPart:
+    case SquareButtonPart:
+    case ButtonPart:
+    case MenulistPart:
+    case MeterPart:
+    case RelevancyLevelIndicatorPart:
+    case ContinuousCapacityLevelIndicatorPart:
+    case DiscreteCapacityLevelIndicatorPart:
+    case RatingLevelIndicatorPart:
+    case ProgressBarPart:
+    case SliderHorizontalPart:
+    case SliderVerticalPart:
+    case SliderThumbHorizontalPart:
+    case SliderThumbVerticalPart:
+    case SearchFieldPart:
+    case SearchFieldCancelButtonPart:
+    case SearchFieldDecorationPart:
+    case SearchFieldResultsDecorationPart:
+    default:
+        break;
+    }
+
+    return false;
+}
+
+bool ThemePainter::paintMeter(LayoutObject*, const PaintInfo&, const IntRect&)
+{
+    return true;
+}
+
+void ThemePainter::paintSliderTicks(LayoutObject* o, const PaintInfo& paintInfo, const IntRect& rect)
+{
+    Node* node = o->node();
+    if (!isHTMLInputElement(node))
+        return;
+
+    HTMLInputElement* input = toHTMLInputElement(node);
+    if (input->type() != InputTypeNames::range)
+        return;
+
+    HTMLDataListElement* dataList = input->dataList();
+    if (!dataList)
+        return;
+
+    double min = input->minimum();
+    double max = input->maximum();
+    ControlPart part = o->style()->appearance();
+    // We don't support ticks on alternate sliders like MediaVolumeSliders.
+    if (part !=  SliderHorizontalPart && part != SliderVerticalPart)
+        return;
+    bool isHorizontal = part ==  SliderHorizontalPart;
+
+    IntSize thumbSize;
+    LayoutObject* thumbLayoutObject = input->userAgentShadowRoot()->getElementById(ShadowElementNames::sliderThumb())->layoutObject();
+    if (thumbLayoutObject) {
+        const ComputedStyle& thumbStyle = thumbLayoutObject->styleRef();
+        int thumbWidth = thumbStyle.width().intValue();
+        int thumbHeight = thumbStyle.height().intValue();
+        thumbSize.setWidth(isHorizontal ? thumbWidth : thumbHeight);
+        thumbSize.setHeight(isHorizontal ? thumbHeight : thumbWidth);
+    }
+
+    IntSize tickSize = LayoutTheme::theme().sliderTickSize();
+    float zoomFactor = o->style()->effectiveZoom();
+    FloatRect tickRect;
+    int tickRegionSideMargin = 0;
+    int tickRegionWidth = 0;
+    IntRect trackBounds;
+    LayoutObject* trackLayoutObject = input->userAgentShadowRoot()->getElementById(ShadowElementNames::sliderTrack())->layoutObject();
+    // We can ignoring transforms because transform is handled by the graphics context.
+    if (trackLayoutObject)
+        trackBounds = trackLayoutObject->absoluteBoundingBoxRectIgnoringTransforms();
+    IntRect sliderBounds = o->absoluteBoundingBoxRectIgnoringTransforms();
+
+    // Make position relative to the transformed ancestor element.
+    trackBounds.setX(trackBounds.x() - sliderBounds.x() + rect.x());
+    trackBounds.setY(trackBounds.y() - sliderBounds.y() + rect.y());
+
+    if (isHorizontal) {
+        tickRect.setWidth(floor(tickSize.width() * zoomFactor));
+        tickRect.setHeight(floor(tickSize.height() * zoomFactor));
+        tickRect.setY(floor(rect.y() + rect.height() / 2.0 + LayoutTheme::theme().sliderTickOffsetFromTrackCenter() * zoomFactor));
+        tickRegionSideMargin = trackBounds.x() + (thumbSize.width() - tickSize.width() * zoomFactor) / 2.0;
+        tickRegionWidth = trackBounds.width() - thumbSize.width();
+    } else {
+        tickRect.setWidth(floor(tickSize.height() * zoomFactor));
+        tickRect.setHeight(floor(tickSize.width() * zoomFactor));
+        tickRect.setX(floor(rect.x() + rect.width() / 2.0 + LayoutTheme::theme().sliderTickOffsetFromTrackCenter() * zoomFactor));
+        tickRegionSideMargin = trackBounds.y() + (thumbSize.width() - tickSize.width() * zoomFactor) / 2.0;
+        tickRegionWidth = trackBounds.height() - thumbSize.width();
+    }
+    RefPtrWillBeRawPtr<HTMLDataListOptionsCollection> options = dataList->options();
+    for (unsigned i = 0; HTMLOptionElement* optionElement = options->item(i); i++) {
+        String value = optionElement->value();
+        if (!input->isValidValue(value))
+            continue;
+        double parsedValue = parseToDoubleForNumberType(input->sanitizeValue(value));
+        double tickFraction = (parsedValue - min) / (max - min);
+        double tickRatio = isHorizontal && o->style()->isLeftToRightDirection() ? tickFraction : 1.0 - tickFraction;
+        double tickPosition = round(tickRegionSideMargin + tickRegionWidth * tickRatio);
+        if (isHorizontal)
+            tickRect.setX(tickPosition);
+        else
+            tickRect.setY(tickPosition);
+        paintInfo.context->fillRect(tickRect, o->resolveColor(CSSPropertyColor));
+    }
+}
+
+bool ThemePainter::paintUsingFallbackTheme(LayoutObject* o, const PaintInfo& i, const IntRect& r)
+{
+    ControlPart part = o->style()->appearance();
+    switch (part) {
+    case CheckboxPart:
+        return paintCheckboxUsingFallbackTheme(o, i, r);
+    case RadioPart:
+        return paintRadioUsingFallbackTheme(o, i, r);
+    default:
+        break;
+    }
+    return true;
+}
+
+bool ThemePainter::paintCheckboxUsingFallbackTheme(LayoutObject* o, const PaintInfo& i, const IntRect& r)
+{
+    WebFallbackThemeEngine::ExtraParams extraParams;
+    WebCanvas* canvas = i.context->canvas();
+    extraParams.button.checked = LayoutTheme::isChecked(o);
+    extraParams.button.indeterminate = LayoutTheme::isIndeterminate(o);
+
+    float zoomLevel = o->style()->effectiveZoom();
+    GraphicsContextStateSaver stateSaver(*i.context);
+    IntRect unzoomedRect = r;
+    if (zoomLevel != 1) {
+        unzoomedRect.setWidth(unzoomedRect.width() / zoomLevel);
+        unzoomedRect.setHeight(unzoomedRect.height() / zoomLevel);
+        i.context->translate(unzoomedRect.x(), unzoomedRect.y());
+        i.context->scale(zoomLevel, zoomLevel);
+        i.context->translate(-unzoomedRect.x(), -unzoomedRect.y());
+    }
+
+    Platform::current()->fallbackThemeEngine()->paint(canvas, WebFallbackThemeEngine::PartCheckbox, getWebFallbackThemeState(o), WebRect(unzoomedRect), &extraParams);
+    return false;
+}
+
+bool ThemePainter::paintRadioUsingFallbackTheme(LayoutObject* o, const PaintInfo& i, const IntRect& r)
+{
+    WebFallbackThemeEngine::ExtraParams extraParams;
+    WebCanvas* canvas = i.context->canvas();
+    extraParams.button.checked = LayoutTheme::isChecked(o);
+    extraParams.button.indeterminate = LayoutTheme::isIndeterminate(o);
+
+    float zoomLevel = o->style()->effectiveZoom();
+    GraphicsContextStateSaver stateSaver(*i.context);
+    IntRect unzoomedRect = r;
+    if (zoomLevel != 1) {
+        unzoomedRect.setWidth(unzoomedRect.width() / zoomLevel);
+        unzoomedRect.setHeight(unzoomedRect.height() / zoomLevel);
+        i.context->translate(unzoomedRect.x(), unzoomedRect.y());
+        i.context->scale(zoomLevel, zoomLevel);
+        i.context->translate(-unzoomedRect.x(), -unzoomedRect.y());
+    }
+
+    Platform::current()->fallbackThemeEngine()->paint(canvas, WebFallbackThemeEngine::PartRadio, getWebFallbackThemeState(o), WebRect(unzoomedRect), &extraParams);
+    return false;
+}
+
+} // namespace blink