cc: Remove all remaining use of WebCore Rect/Point/Size types from the compositor.

cc/page_scale_animation.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "cc/page_scale_animation.h"
 
-#include "FloatPoint.h"
-#include "FloatSize.h"
-#include "IntPoint.h"
-#include "IntSize.h"
+#include "cc/geometry.h"
 #include "ui/gfx/rect_f.h"
+#include "ui/gfx/vector2d_conversions.h"
+#include "ui/gfx/vector2d_f.h"
 
 #include <math.h>
 
 namespace cc {
 
-scoped_ptr<PageScaleAnimation> PageScaleAnimation::create(const IntSize& scrollStart, float pageScaleStart, const gfx::Size& windowSize, const gfx::Size& contentSize, double startTime)
+scoped_ptr<PageScaleAnimation> PageScaleAnimation::create(gfx::Vector2d scrollStart, float pageScaleStart, const gfx::Size& windowSize, const gfx::Size& contentSize, double startTime)
 {
     return make_scoped_ptr(new PageScaleAnimation(scrollStart, pageScaleStart, windowSize, contentSize, startTime));
 }
 
-PageScaleAnimation::PageScaleAnimation(const IntSize& scrollStart, float pageScaleStart, const gfx::Size& windowSize, const gfx::Size& contentSize, double startTime)
+PageScaleAnimation::PageScaleAnimation(gfx::Vector2d scrollStart, float pageScaleStart, const gfx::Size& windowSize, const gfx::Size& contentSize, double startTime)
     : m_scrollStart(scrollStart)
     , m_pageScaleStart(pageScaleStart)
     , m_windowSize(windowSize)
     , m_contentSize(contentSize)
     , m_anchorMode(false)
     , m_scrollEnd(scrollStart)
     , m_pageScaleEnd(pageScaleStart)
     , m_startTime(startTime)
     , m_duration(0)
 {
 }
 
 PageScaleAnimation::~PageScaleAnimation()
 {
 }
 
-void PageScaleAnimation::zoomTo(const IntSize& finalScroll, float finalPageScale, double duration)
+void PageScaleAnimation::zoomTo(gfx::Vector2d finalScroll, float finalPageScale, double duration)
 {
     if (m_pageScaleStart != finalPageScale) {
         // For uniform-looking zooming, infer the anchor (point that remains in
         // place throughout the zoom) from the start and end rects.
-        gfx::RectF startRect(cc::FloatPoint(cc::IntPoint(m_scrollStart)), m_windowSize);
-        gfx::RectF endRect(cc::FloatPoint(cc::IntPoint(finalScroll)), m_windowSize);
+        gfx::RectF startRect(gfx::PointAtOffsetFromOrigin(m_scrollStart), m_windowSize);
+        gfx::RectF endRect(gfx::PointAtOffsetFromOrigin(finalScroll), m_windowSize);
         endRect.Scale(m_pageScaleStart / finalPageScale);
 
         // The anchor is the point which is at the same ratio of the sides of
         // both startRect and endRect. For example, a zoom-in double-tap to a
         // perfectly centered rect will have anchor ratios (0.5, 0.5), while one
         // to a rect touching the bottom-right of the screen will have anchor
         // ratios (1.0, 1.0). In other words, it obeys the equations:
         // anchorX = start_width * ratioX + start_x
         // anchorX = end_width * ratioX + end_x
         // anchorY = start_height * ratioY + start_y
         // anchorY = end_height * ratioY + end_y
         // where both anchor{x,y} and ratio{x,y} begin as unknowns. Solving
         // for the ratios, we get the following formulas:
         float ratioX = (startRect.x() - endRect.x()) / (endRect.width() - startRect.width());
         float ratioY = (startRect.y() - endRect.y()) / (endRect.height() - startRect.height());
 
-        IntSize anchor(m_windowSize.width() * ratioX, m_windowSize.height() * ratioY);
+        gfx::Vector2d anchor(m_windowSize.width() * ratioX, m_windowSize.height() * ratioY);
         zoomWithAnchor(anchor, finalPageScale, duration);
     } else {
         // If this is a pure translation, then there exists no anchor. Linearly
         // interpolate the scroll offset instead.
         m_scrollEnd = finalScroll;
         m_pageScaleEnd = finalPageScale;
         m_duration = duration;
         m_anchorMode = false;
     }
 }
 
-void PageScaleAnimation::zoomWithAnchor(const IntSize& anchor, float finalPageScale, double duration)
+void PageScaleAnimation::zoomWithAnchor(gfx::Vector2d anchor, float finalPageScale, double duration)
 {
     m_scrollEnd = m_scrollStart + anchor;
-    m_scrollEnd.scale(finalPageScale / m_pageScaleStart);
+    m_scrollEnd = gfx::ToFlooredVector2d(cc::ScaleVector2d(m_scrollEnd, finalPageScale / m_pageScaleStart));
     m_scrollEnd -= anchor;
 
-    m_scrollEnd.clampNegativeToZero();
+    m_scrollEnd = ClampFromBelow(m_scrollEnd, gfx::Vector2d());
     gfx::SizeF scaledContentSize = m_contentSize.Scale(finalPageScale / m_pageScaleStart);
-    IntSize maxScrollPosition = roundedIntSize(cc::FloatSize(scaledContentSize) - cc::IntSize(m_windowSize));
-    m_scrollEnd = m_scrollEnd.shrunkTo(maxScrollPosition);
+    gfx::Vector2d maxScrollOffset = gfx::ToRoundedVector2d(BottomRight(gfx::RectF(scaledContentSize)) - BottomRight(gfx::Rect(m_windowSize)));
+    m_scrollEnd = m_scrollEnd;
+    m_scrollEnd = ClampFromAbove(m_scrollEnd, maxScrollOffset);
 
     m_anchor = anchor;
     m_pageScaleEnd = finalPageScale;
     m_duration = duration;
     m_anchorMode = true;
 }
 
-IntSize PageScaleAnimation::scrollOffsetAtTime(double time) const
+gfx::Vector2d PageScaleAnimation::scrollOffsetAtTime(double time) const
 {
     return scrollOffsetAtRatio(progressRatioForTime(time));
 }
 
 float PageScaleAnimation::pageScaleAtTime(double time) const
 {
     return pageScaleAtRatio(progressRatioForTime(time));
 }
 
 bool PageScaleAnimation::isAnimationCompleteAtTime(double time) const
 {
     return time >= endTime();
 }
 
 float PageScaleAnimation::progressRatioForTime(double time) const
 {
     if (isAnimationCompleteAtTime(time))
         return 1;
 
     return (time - m_startTime) / m_duration;
 }
 
-IntSize PageScaleAnimation::scrollOffsetAtRatio(float ratio) const
+gfx::Vector2d PageScaleAnimation::scrollOffsetAtRatio(float ratio) const
 {
     if (ratio <= 0)
         return m_scrollStart;
     if (ratio >= 1)
         return m_scrollEnd;
 
     float currentPageScale = pageScaleAtRatio(ratio);
-    IntSize currentScrollOffset;
+    gfx::Vector2d currentScrollOffset;
     if (m_anchorMode) {
         // Keep the anchor stable on the screen at the current scale.
-        IntSize documentAnchor = m_scrollStart + m_anchor;
-        documentAnchor.scale(currentPageScale / m_pageScaleStart);
-        currentScrollOffset = documentAnchor - m_anchor;
+        gfx::Vector2dF documentAnchor = m_scrollStart + m_anchor;
+        documentAnchor.Scale(currentPageScale / m_pageScaleStart);
+        currentScrollOffset = gfx::ToRoundedVector2d(documentAnchor - m_anchor);
     } else {
         // First move both scroll offsets to the current coordinate space.
-        FloatSize scaledStartScroll(m_scrollStart);
-        scaledStartScroll.scale(currentPageScale / m_pageScaleStart);
-        FloatSize scaledEndScroll(m_scrollEnd);
-        scaledEndScroll.scale(currentPageScale / m_pageScaleEnd);
+        gfx::Vector2dF scaledStartScroll(m_scrollStart);
+        scaledStartScroll.Scale(currentPageScale / m_pageScaleStart);
+        gfx::Vector2dF scaledEndScroll(m_scrollEnd);
+        scaledEndScroll.Scale(currentPageScale / m_pageScaleEnd);
 
         // Linearly interpolate between them.
-        FloatSize delta = scaledEndScroll - scaledStartScroll;
-        delta.scale(ratio);
-        currentScrollOffset = roundedIntSize(scaledStartScroll + delta);
+        gfx::Vector2dF delta = scaledEndScroll - scaledStartScroll;
+        delta.Scale(ratio);
+        currentScrollOffset = gfx::ToRoundedVector2d(scaledStartScroll + delta);
     }
 
     return currentScrollOffset;
 }
 
 float PageScaleAnimation::pageScaleAtRatio(float ratio) const
 {
     if (ratio <= 0)
         return m_pageScaleStart;
     if (ratio >= 1)
         return m_pageScaleEnd;
 
     // Linearly interpolate the magnitude in log scale.
     // Log scale is needed to maintain the appearance of uniform zoom. For
     // example, if we zoom from 0.5 to 4.0 in 3 seconds, then we should
     // be zooming by 2x every second.
     float diff = m_pageScaleEnd / m_pageScaleStart;
     float logDiff = log(diff);
     logDiff *= ratio;
     diff = exp(logDiff);
     return m_pageScaleStart * diff;
 }
 
 }  // namespace cc