// Copyright (c) 2011 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 "chrome/browser/ui/views/browser_bubble.h"

#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/views/frame/browser_view.h"
#include "ui/views/widget/widget.h"

BrowserBubble::BrowserBubble(Browser* browser,
                             views::View* view,
                             const gfx::Rect& relative_to,
                             views::BubbleBorder::ArrowLocation arrow_location)
    : frame_(NULL),
      view_(view),
      relative_to_(relative_to),
      arrow_location_(arrow_location),
      delegate_(NULL),
      attached_(false),
      bubble_host_(NULL) {
  BrowserView* browser_view = BrowserView::GetBrowserViewForBrowser(browser);
  frame_ = browser_view->GetWidget();
  bubble_host_ = browser_view;
  // Keep relative_to_ in frame-relative coordinates to aid in drag
  // positioning.
  gfx::Point origin = relative_to_.origin();
  views::View::ConvertPointToView(NULL, frame_->GetRootView(), &origin);
  relative_to_.set_origin(origin);

  // Use half the corner radius as contents margins so that contents fit better
  // in the bubble. See http://crbug.com/80416.
  int corner_inset = views::BubbleBorder::GetCornerRadius() / 2;
  gfx::Insets content_margins(corner_inset, corner_inset,
                              corner_inset, corner_inset);
  InitPopup(content_margins);
}

BrowserBubble::~BrowserBubble() {
  DCHECK(!attached_);
  popup_->Close();

  // Don't call DetachFromBrowser from here.  It needs to talk to the
  // BrowserView to deregister itself, and if BrowserBubble is owned
  // by a child of BrowserView, then it's possible that this stack frame
  // is a descendant of BrowserView's destructor, which leads to problems.
  // In that case, Detach doesn't need to get called anyway since BrowserView
  // will do the necessary cleanup.
}

void BrowserBubble::DetachFromBrowser() {
  DCHECK(attached_);
  if (!attached_)
    return;
  attached_ = false;

  if (bubble_host_)
    bubble_host_->DetachBrowserBubble(this);
}

void BrowserBubble::AttachToBrowser() {
  DCHECK(!attached_);
  if (attached_)
    return;

  if (bubble_host_)
    bubble_host_->AttachBrowserBubble(this);

  attached_ = true;
}

void BrowserBubble::BrowserWindowMoved() {
  if (delegate_)
    delegate_->BubbleBrowserWindowMoved(this);
  else
    Hide();
  if (popup_->IsVisible())
    Reposition();
}

void BrowserBubble::BrowserWindowClosing() {
  if (delegate_)
    delegate_->BubbleBrowserWindowClosing(this);
  else
    Hide();
}

void BrowserBubble::SetBounds(int x, int y, int w, int h) {
  // If the UI layout is RTL, we don't need to mirror coordinates, since
  // View logic will do that for us.
  bounds_.SetRect(x, y, w, h);
  Reposition();
}

void BrowserBubble::MoveTo(int x, int y) {
  SetBounds(x, y, bounds_.width(), bounds_.height());
}

void BrowserBubble::Reposition() {
  gfx::Point top_left;
  views::View::ConvertPointToScreen(frame_->GetRootView(), &top_left);
  MovePopup(top_left.x() + bounds_.x(),
            top_left.y() + bounds_.y(),
            bounds_.width(),
            bounds_.height());
}

gfx::Rect BrowserBubble::GetAbsoluteRelativeTo() {
  // |relative_to_| is in browser-relative coordinates, so convert it to
  // screen coordinates for use in placing the popup widgets.
  gfx::Rect relative_rect = relative_to_;
  gfx::Point relative_origin = relative_rect.origin();
  views::View::ConvertPointToScreen(frame_->GetRootView(), &relative_origin);
  relative_rect.set_origin(relative_origin);

  return relative_rect;
}

void BrowserBubble::SetAbsoluteBounds(const gfx::Rect& window_bounds) {
  // Convert screen coordinates to frame relative.
  gfx::Point relative_origin = window_bounds.origin();
  views::View::ConvertPointToView(NULL, frame_->GetRootView(),
                                  &relative_origin);
  SetBounds(relative_origin.x(), relative_origin.y(),
            window_bounds.width(), window_bounds.height());
}

void BrowserBubble::MovePopup(int x, int y, int w, int h) {
  popup_->SetBounds(gfx::Rect(x, y, w, h));
}