// 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/renderer/render_view_impl.h"

#include "base/command_line.h"
#include "base/message_loop/message_loop.h"
#include "cc/trees/layer_tree_host.h"
#include "content/common/view_messages.h"
#include "content/renderer/gpu/render_widget_compositor.h"
#include "third_party/WebKit/public/web/WebView.h"

namespace content {

// Check content::TopControlsState, and blink::WebWidget::TopControlsState
// are kept in sync.
static_assert(
    int(TOP_CONTROLS_STATE_SHOWN) == int(blink::WebTopControlsShown),
    "mismatching enums: SHOWN");
static_assert(
    int(TOP_CONTROLS_STATE_HIDDEN) == int(blink::WebTopControlsHidden),
    "mismatching enums: HIDDEN");
static_assert(
    int(TOP_CONTROLS_STATE_BOTH) == int(blink::WebTopControlsBoth),
    "mismatching enums: BOTH");

blink::WebTopControlsState ContentToBlink(
    TopControlsState state) {
  return static_cast<blink::WebTopControlsState>(state);
}


// TODO(mvanouwerkerk): Stop calling this code path and delete it.
void RenderViewImpl::OnUpdateTopControlsState(bool enable_hiding,
                                              bool enable_showing,
                                              bool animate) {
  // TODO(tedchoc): Investigate why messages are getting here before the
  //                compositor has been initialized.
  LOG_IF(WARNING, !compositor_) << "OnUpdateTopControlsState was unhandled.";
  TopControlsState constraints = TOP_CONTROLS_STATE_BOTH;
  if (!enable_showing)
    constraints = TOP_CONTROLS_STATE_HIDDEN;
  if (!enable_hiding)
    constraints = TOP_CONTROLS_STATE_SHOWN;
  TopControlsState current = TOP_CONTROLS_STATE_BOTH;

  UpdateTopControlsState(constraints, current, animate);
}

void RenderViewImpl::UpdateTopControlsState(TopControlsState constraints,
                                            TopControlsState current,
                                            bool animate) {
  if (webwidget())
    webwidget()->updateTopControlsState(ContentToBlink(constraints),
                                        ContentToBlink(current),
                                        animate);

  top_controls_constraints_ = constraints;
}

void RenderViewImpl::didScrollWithKeyboard(const blink::WebSize& delta) {
  if (delta.height == 0)
    return;

  TopControlsState current = delta.height < 0 ? TOP_CONTROLS_STATE_SHOWN
                                              : TOP_CONTROLS_STATE_HIDDEN;

  UpdateTopControlsState(top_controls_constraints_, current, true);
}

void RenderViewImpl::OnExtractSmartClipData(const gfx::Rect& rect) {
  blink::WebString clip_text;
  blink::WebString clip_html;
  blink::WebRect clip_rect;
  webview()->extractSmartClipData(rect, clip_text, clip_html, clip_rect);
  Send(new ViewHostMsg_SmartClipDataExtracted(
      routing_id_, clip_text, clip_html, clip_rect));
}

}  // namespace content