Reland "Refactor ContentViewClient (4/6)"

content/browser/renderer_host/render_widget_host_view_android.cc

 // Copyright (c) 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 "content/browser/renderer_host/render_widget_host_view_android.h"
 
 #include <android/bitmap.h>
 
 #include <utility>
 
@@ skipping 381 matching lines @@
 
   gl_helper->CropScaleReadbackAndCleanMailbox(
       texture_mailbox.mailbox(), texture_mailbox.sync_token(), result->size(),
       gfx::Rect(result->size()), output_size_in_pixel, pixels, color_type,
       base::Bind(&CopyFromCompositingSurfaceFinished, callback,
                  base::Passed(&release_callback), base::Passed(&bitmap),
                  start_time, base::Passed(&bitmap_pixels_lock), readback_lock),
       display_compositor::GLHelper::SCALER_QUALITY_GOOD);
 }
 
+bool FloatEquals(float a, float b) {
+  return std::abs(a - b) < FLT_EPSILON;
+}
+
 }  // namespace
 
 void RenderWidgetHostViewAndroid::OnContextLost() {
   std::unique_ptr<RenderWidgetHostIterator> widgets(
       RenderWidgetHostImpl::GetAllRenderWidgetHosts());
   while (RenderWidgetHost* widget = widgets->GetNextHost()) {
     if (widget->GetView()) {
       static_cast<RenderWidgetHostViewAndroid*>(widget->GetView())
           ->OnLostResources();
     }
@@ skipping 15 matching lines @@
       cached_background_color_(SK_ColorWHITE),
       last_compositor_frame_sink_id_(kUndefinedCompositorFrameSinkId),
       gesture_provider_(ui::GetGestureProviderConfig(
                             ui::GestureProviderConfigType::CURRENT_PLATFORM),
                         this),
       stylus_text_selector_(this),
       using_browser_compositor_(CompositorImpl::IsInitialized()),
       synchronous_compositor_client_(nullptr),
       frame_evictor_(new DelegatedFrameEvictor(this)),
       observing_root_window_(false),
+      prev_top_shown_pix_(0.f),
+      prev_bottom_shown_pix_(0.f),
       weak_ptr_factory_(this) {
   // Set the layer which will hold the content layer for this view. The content
   // layer is managed by the DelegatedFrameHost.
   view_.SetLayer(cc::Layer::Create());
   if (using_browser_compositor_) {
     cc::FrameSinkId frame_sink_id =
         host_->AllocateFrameSinkId(false /* is_guest_view_hack */);
     delegated_frame_host_.reset(new ui::DelegatedFrameHostAndroid(
         &view_, cached_background_color_, this, frame_sink_id));
   }
@@ skipping 330 matching lines @@
 
 void RenderWidgetHostViewAndroid::UpdateBackgroundColor(SkColor color) {
   if (cached_background_color_ == color)
     return;
 
   cached_background_color_ = color;
 
   if (delegated_frame_host_)
     delegated_frame_host_->UpdateBackgroundColor(color);
 
-  if (content_view_core_)
-    content_view_core_->OnBackgroundColorChanged(color);
+  view_.OnBackgroundColorChanged(color);
 }
 
 void RenderWidgetHostViewAndroid::SetNeedsBeginFrames(bool needs_begin_frames) {
   TRACE_EVENT1("cc", "RenderWidgetHostViewAndroid::SetNeedsBeginFrames",
                "needs_begin_frames", needs_begin_frames);
   if (needs_begin_frames)
     AddBeginFrameRequest(PERSISTENT_BEGIN_FRAME);
   else
     ClearBeginFrameRequest(PERSISTENT_BEGIN_FRAME);
 }
 
 void RenderWidgetHostViewAndroid::OnStartContentIntent(
     const GURL& content_url, bool is_main_frame) {
-  if (content_view_core_)
-    content_view_core_->StartContentIntent(content_url, is_main_frame);
+  view_.StartContentIntent(content_url, is_main_frame);
 }
 
 bool RenderWidgetHostViewAndroid::OnTouchEvent(
     const ui::MotionEvent& event) {
   if (!host_)
     return false;
 
   ComputeEventLatencyOSTouchHistograms(event);
 
   // If a browser-based widget consumes the touch event, it's critical that
@@ skipping 447 matching lines @@
     selection_controller_->OnViewportChanged(viewport_rect);
   }
 
   UpdateBackgroundColor(is_transparent ? SK_ColorTRANSPARENT
                                        : frame_metadata.root_background_color);
 
   view_.set_content_offset(gfx::Vector2dF(0.0f,
       frame_metadata.top_controls_height *
           frame_metadata.top_controls_shown_ratio));
 
+  float dip_scale = ui::GetScaleFactorForNativeView(GetNativeView());
+  float top_controls_pix = frame_metadata.top_controls_height * dip_scale;
+  float top_shown_pix =
+      top_controls_pix * frame_metadata.top_controls_shown_ratio;
+  bool top_changed = !FloatEquals(top_shown_pix, prev_top_shown_pix_);
+
+  float bottom_controls_pix = frame_metadata.bottom_controls_height * dip_scale;
+  float bottom_shown_pix =
+      bottom_controls_pix * frame_metadata.bottom_controls_shown_ratio;
+  bool bottom_changed = !FloatEquals(bottom_shown_pix, prev_bottom_shown_pix_);
+
+  if (top_changed) {
+    float translate = top_shown_pix - top_controls_pix;
+    view_.OnTopControlsChanged(translate, top_shown_pix);
+    prev_top_shown_pix_ = top_shown_pix;
+  }
+  if (bottom_changed) {
+    float translate = bottom_controls_pix - bottom_shown_pix;
+    view_.OnBottomControlsChanged(translate, bottom_shown_pix);
+    prev_bottom_shown_pix_ = bottom_shown_pix;
+  }
+
   // All offsets and sizes are in CSS pixels.
   content_view_core_->UpdateFrameInfo(
       frame_metadata.root_scroll_offset,
       frame_metadata.page_scale_factor,
       gfx::Vector2dF(frame_metadata.min_page_scale_factor,
                      frame_metadata.max_page_scale_factor),
       frame_metadata.root_layer_size,
       frame_metadata.scrollable_viewport_size,
       frame_metadata.top_controls_height,
       frame_metadata.top_controls_shown_ratio,
-      frame_metadata.bottom_controls_height,
-      frame_metadata.bottom_controls_shown_ratio,
       is_mobile_optimized,
       frame_metadata.selection.start);
 }
 
 void RenderWidgetHostViewAndroid::ShowInternal() {
   bool show = is_showing_ && is_window_activity_started_ && is_window_visible_;
   if (!show)
     return;
 
   if (!host_ || !host_->is_hidden())
@@ skipping 675 matching lines @@
   ui::WindowAndroidCompositor* compositor = window_android->GetCompositor();
   if (!compositor)
     return;
 
   overscroll_controller_ = base::MakeUnique<OverscrollControllerAndroid>(
       overscroll_refresh_handler, compositor,
       ui::GetScaleFactorForNativeView(GetNativeView()));
 }
 
 }  // namespace content