// 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/cocoa/tab_contents/web_drag_bookmark_handler_mac.h"

#include "base/functional/callback_helpers.h"
#include "chrome/browser/ui/bookmarks/bookmark_tab_helper.h"
#include "chrome/browser/ui/browser_window/public/browser_window_interface.h"
#include "chrome/browser/ui/browser_window/public/global_browser_collection.h"
#include "content/public/browser/web_contents.h"
#include "ui/base/base_window.h"

using content::WebContents;

WebDragBookmarkHandlerMac::WebDragBookmarkHandlerMac()
    : bookmark_tab_helper_(nullptr), web_contents_(nullptr) {}

WebDragBookmarkHandlerMac::~WebDragBookmarkHandlerMac() {}

void WebDragBookmarkHandlerMac::DragInitialize(WebContents* contents) {
  web_contents_ = contents;
  if (!bookmark_tab_helper_) {
    bookmark_tab_helper_ = BookmarkTabHelper::FromWebContents(contents);
  }

  // This operation is synchronous on Mac.
  bookmarks::BookmarkNodeData::ReadFromClipboard(
      ui::ClipboardBuffer::kDrag,
      base::BindOnce(
          [](bookmarks::BookmarkNodeData* bookmark_drag_data,
             std::unique_ptr<bookmarks::BookmarkNodeData> data) {
            if (data) {
              *bookmark_drag_data = std::move(*data);
            }
          },
          &bookmark_drag_data_));
}

void WebDragBookmarkHandlerMac::OnDragOver() {
  if (bookmark_tab_helper_ && bookmark_tab_helper_->bookmark_drag_delegate()) {
    bookmark_tab_helper_->bookmark_drag_delegate()->OnDragOver(
        bookmark_drag_data_);
  }
}

void WebDragBookmarkHandlerMac::OnDragEnter() {
  if (bookmark_tab_helper_ && bookmark_tab_helper_->bookmark_drag_delegate()) {
    bookmark_tab_helper_->bookmark_drag_delegate()->OnDragEnter(
        bookmark_drag_data_);
  }
}

void WebDragBookmarkHandlerMac::OnDrop() {
  // This is non-null if the web_contents_ is showing an ExtensionUrlOverrides
  // with support for (at the moment experimental) drag and drop extensions.
  if (bookmark_tab_helper_) {
    if (bookmark_tab_helper_->bookmark_drag_delegate()) {
      bookmark_tab_helper_->bookmark_drag_delegate()->OnDrop(
          bookmark_drag_data_);
    }

    // Focus the target browser.
    BrowserWindowInterface* browser =
        GlobalBrowserCollection::GetInstance()->FindBrowserWithTab(
            web_contents_);
    if (browser) {
      browser->GetWindow()->Show();
    }
  }
}

void WebDragBookmarkHandlerMac::OnDragLeave() {
  if (bookmark_tab_helper_ && bookmark_tab_helper_->bookmark_drag_delegate()) {
    bookmark_tab_helper_->bookmark_drag_delegate()->OnDragLeave(
        bookmark_drag_data_);
  }
}
