// Copyright 2012 The Chromium Authors
// 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/extensions/extension_view_views.h"

#include "base/functional/bind.h"
#include "build/build_config.h"
#include "chrome/browser/extensions/extension_view_host.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/views/extensions/extension_popup.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/browser/web_contents.h"
#include "extensions/common/mojom/view_type.mojom.h"
#include "ui/base/cursor/cursor.h"
#include "ui/base/metadata/metadata_impl_macros.h"
#include "ui/events/event.h"
#include "ui/views/controls/native/native_view_host.h"
#include "ui/views/property_effects.h"
#include "ui/views/widget/widget.h"

ExtensionViewViews::ExtensionViewViews(Profile* profile,
                                       extensions::ExtensionViewHost* host)
    : views::WebView(profile), host_(host) {
  web_contents_attached_subscription_ =
      AddWebContentsAttachedCallback(base::BindRepeating(
          &ExtensionViewViews::OnWebContentsAttached, base::Unretained(this)));
  host_->set_view(this);
  SetWebContents(host_->web_contents());
}

ExtensionViewViews::~ExtensionViewViews() {
  if (parent()) {
    parent()->RemoveChildView(this);
  }

  observers_.Notify(&Observer::OnViewDestroying);
}

void ExtensionViewViews::Init() {
  if (host_->extension_host_type() ==
      extensions::mojom::ViewType::kExtensionPopup) {
    DCHECK(container_);

    // This will set the max popup bounds for the duration of the popup's
    // lifetime; they won't be readjusted if the window moves. This is usually
    // okay, since moving the window typically (but not always) results in
    // the popup closing.
    EnableSizingFromWebContents(container_->GetMinBounds(),
                                container_->GetMaxBounds());
  }
}

void ExtensionViewViews::VisibilityChanged(View* starting_from,
                                           bool is_visible) {
  views::WebView::VisibilityChanged(starting_from, is_visible);

  if (starting_from == this) {
    if (is_visible) {
      web_contents()->WasShown();
    } else {
      web_contents()->WasHidden();
    }
  }
}

gfx::Size ExtensionViewViews::GetMinimumSize() const {
  return minimum_size_.value_or(GetPreferredSize());
}

void ExtensionViewViews::SetMinimumSize(const gfx::Size& minimum_size) {
  if (minimum_size_ && minimum_size_.value() == minimum_size) {
    return;
  }
  minimum_size_ = minimum_size;
  OnPropertyChanged(&minimum_size_,
                    views::PropertyEffects::kPreferredSizeChanged);
}

void ExtensionViewViews::SetContainer(
    ExtensionViewViews::Container* container) {
  container_ = container;
  OnPropertyChanged(&container_, views::PropertyEffects::kPreferredSizeChanged);
}

ExtensionViewViews::Container* ExtensionViewViews::GetContainer() const {
  return container_.get();
}

void ExtensionViewViews::AddObserver(Observer* observer) {
  observers_.AddObserver(observer);
}

void ExtensionViewViews::RemoveObserver(Observer* observer) {
  observers_.RemoveObserver(observer);
}

gfx::NativeView ExtensionViewViews::GetNativeView() {
  return holder()->native_view();
}

void ExtensionViewViews::ResizeDueToAutoResize(
    content::WebContents* web_contents,
    const gfx::Size& new_size) {
  // Don't actually do anything with this information until we have been shown.
  // Size changes will not be honored by lower layers while we are hidden.
  if (!GetVisible()) {
    pending_preferred_size_ = new_size;
    return;
  }

  WebView::ResizeDueToAutoResize(web_contents, new_size);
}

void ExtensionViewViews::RenderFrameCreated(
    content::RenderFrameHost* frame_host) {
  WebView::RenderFrameCreated(frame_host);
}

bool ExtensionViewViews::HandleKeyboardEvent(
    content::WebContents* source,
    const input::NativeWebKeyboardEvent& event) {
  return unhandled_keyboard_event_handler_.HandleKeyboardEvent(
      event, GetFocusManager());
}

void ExtensionViewViews::OnLoaded() {
  DCHECK(host_->has_loaded_once());

  // ExtensionPopup delegates showing the view to OnLoaded(). ExtensionDialog
  // handles visibility directly.
  if (GetVisible()) {
    return;
  }

  SetVisible(true);
  ResizeDueToAutoResize(web_contents(), pending_preferred_size_);
}

ui::Cursor ExtensionViewViews::GetCursor(const ui::MouseEvent& event) {
  return ui::Cursor();
}

void ExtensionViewViews::OnWebContentsAttached(views::WebView*) {
  host_->CreateRendererSoon();
  SetVisible(false);
}

BEGIN_METADATA(ExtensionViewViews)
ADD_PROPERTY_METADATA(gfx::Size, MinimumSize)
ADD_PROPERTY_METADATA(ExtensionViewViews::Container*, Container)
END_METADATA