auto import from //depot/cupcake/@136594

1 files changed, 148 insertions, 0 deletions

diff --git a/WebCore/platform/chromium/ScrollbarThemeChromiumLinux.cpp b/WebCore/platform/chromium/ScrollbarThemeChromiumLinux.cpp
new file mode 100644
index 0000000..95d0f78
--- /dev/null
+++ b/WebCore/platform/chromium/ScrollbarThemeChromiumLinux.cpp
@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 2008, 2009, Google 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:
+ * 
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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 THE COPYRIGHT
+ * OWNER 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.
+ */
+
+#include "config.h"
+#include "ScrollbarThemeChromium.h"
+
+#include "NotImplemented.h"
+#include "PlatformContextSkia.h"
+#include "PlatformMouseEvent.h"
+#include "Scrollbar.h"
+#include "TransformationMatrix.h"
+
+#include "gtkdrawing.h"
+#include <gtk/gtk.h>
+#include "skia/ext/GdkSkia.h"
+
+namespace WebCore {
+
+int ScrollbarThemeChromium::scrollbarThickness(ScrollbarControlSize controlSize)
+{
+    static int size = 0;
+    if (!size) {
+        MozGtkScrollbarMetrics metrics;
+        moz_gtk_get_scrollbar_metrics(&metrics);
+        size = metrics.slider_width;
+    }
+    return size;
+}
+
+bool ScrollbarThemeChromium::invalidateOnMouseEnterExit()
+{
+    notImplemented();
+    return false;
+}
+
+// Given an uninitialised widget state object, set the members such that it's
+// sane for drawing scrollbars
+static void initMozState(GtkWidgetState* mozState)
+{
+    mozState->active = true;
+    mozState->focused = false;
+    mozState->inHover = false;
+    mozState->disabled = false;
+    mozState->isDefault = false;
+    mozState->canDefault = false;
+    mozState->depressed = false;
+    mozState->curpos = 0;
+    mozState->maxpos = 0;
+}
+
+// Paint a GTK widget
+//   gc: context to draw onto
+//   rect: the area of the widget
+//   widget_type: the type of widget to draw
+//   flags: widget dependent flags (e.g. direction of scrollbar arrows etc)
+//
+// See paintMozWiget in RenderThemeGtk.cpp for an explanation of the clipping.
+static void paintScrollbarWidget(GraphicsContext* gc, const IntRect& rect,
+                                 GtkThemeWidgetType widget_type, gint flags)
+{
+    PlatformContextSkia* pcs = gc->platformContext();
+
+    GdkRectangle gdkRect = { rect.x(), rect.y(), rect.width(), rect.height() };
+
+    const SkIRect clip_region = pcs->canvas()->getTotalClip().getBounds();
+    TransformationMatrix ctm = gc->getCTM().inverse();
+    IntPoint pos = ctm.mapPoint(
+        IntPoint(SkScalarRound(clip_region.fLeft), SkScalarRound(clip_region.fTop)));
+    GdkRectangle gdkClipRect;
+    gdkClipRect.x = pos.x();
+    gdkClipRect.y = pos.y();
+    gdkClipRect.width = clip_region.width();
+    gdkClipRect.height = clip_region.height();
+
+    gdk_rectangle_intersect(&gdkRect, &gdkClipRect, &gdkClipRect);
+
+    GtkWidgetState mozState;
+    initMozState(&mozState);
+
+    moz_gtk_widget_paint(widget_type, pcs->gdk_skia(), &gdkRect, &gdkClipRect,
+                         &mozState, flags, GTK_TEXT_DIR_LTR);
+}
+
+void ScrollbarThemeChromium::paintTrackPiece(GraphicsContext* gc, Scrollbar* scrollbar,
+                                             const IntRect& rect, ScrollbarPart partType)
+{
+    const bool horz = scrollbar->orientation() == HorizontalScrollbar;
+    const GtkThemeWidgetType track_type =
+        horz ? MOZ_GTK_SCROLLBAR_TRACK_HORIZONTAL : MOZ_GTK_SCROLLBAR_TRACK_VERTICAL;
+    paintScrollbarWidget(gc, rect, track_type, 0);
+}
+
+void ScrollbarThemeChromium::paintButton(GraphicsContext* gc, Scrollbar* scrollbar,
+                                    const IntRect& rect, ScrollbarPart part)
+{
+    // FIXME: It appears the either we're upsetting GTK by forcing WebKit sizes
+    // on it, or the buttons expect the track to be drawn under them.  Either
+    // way, we end up with unpainted pixels which are upsetting the pixel
+    // tests. Thus we paint green under the buttons to, at least, make the
+    // pixel output the same between debug and opt builds.
+    SkPaint paint;
+    paint.setARGB(255, 0, 255, 128);
+    SkRect skrect;
+    skrect.set(rect.x(), rect.y(), rect.x() + rect.width() - 1, rect.y() + rect.height() - 1);
+    gc->platformContext()->canvas()->drawRect(skrect, paint);
+
+    const bool horz = scrollbar->orientation() == HorizontalScrollbar;
+    gint flags = horz ? 0 : MOZ_GTK_STEPPER_VERTICAL;
+    flags |= ForwardButtonEndPart == part ? MOZ_GTK_STEPPER_DOWN : 0;
+    paintScrollbarWidget(gc, rect, MOZ_GTK_SCROLLBAR_BUTTON, flags);
+}
+
+void ScrollbarThemeChromium::paintThumb(GraphicsContext* gc, Scrollbar* scrollbar, const IntRect& rect)
+{
+    const bool horz = scrollbar->orientation() == HorizontalScrollbar;
+    const GtkThemeWidgetType thumb_type =
+        horz ? MOZ_GTK_SCROLLBAR_THUMB_HORIZONTAL : MOZ_GTK_SCROLLBAR_THUMB_VERTICAL;
+    paintScrollbarWidget(gc, rect, thumb_type, 0);
+}
+
+} // namespace WebCore