// 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 "chrome/browser/ui/bookmarks/bookmark_utils.h"

#include <stddef.h>

#include "base/logging.h"
#include "build/build_config.h"
#include "chrome/browser/bookmarks/bookmark_model_factory.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/search/search.h"
#include "chrome/common/pref_names.h"
#include "chrome/common/url_constants.h"
#include "components/bookmarks/browser/bookmark_model.h"
#include "components/bookmarks/browser/bookmark_node_data.h"
#include "components/bookmarks/common/bookmark_pref_names.h"
#include "components/prefs/pref_service.h"
#include "components/search/search.h"
#include "components/url_formatter/url_formatter.h"
#include "components/user_prefs/user_prefs.h"
#include "components/vector_icons/vector_icons.h"
#include "content/public/browser/web_contents.h"
#include "extensions/buildflags/buildflags.h"
#include "ui/base/dragdrop/drag_drop_types.h"
#include "ui/base/dragdrop/drop_target_event.h"
#include "ui/base/material_design/material_design_controller.h"

#if BUILDFLAG(ENABLE_EXTENSIONS)
#include "chrome/browser/extensions/api/commands/command_service.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/common/extension_set.h"
#endif

#if defined(TOOLKIT_VIEWS)
#include "ui/gfx/color_utils.h"
#include "ui/gfx/paint_vector_icon.h"
#endif

#if defined(OS_WIN) || defined(OS_MACOSX)
#include "chrome/grit/theme_resources.h"
#include "ui/base/resource/resource_bundle.h"
#endif

using bookmarks::BookmarkModel;
using bookmarks::BookmarkNode;

namespace chrome {

namespace {

// The ways in which extensions may customize the bookmark shortcut.
enum BookmarkShortcutDisposition {
  BOOKMARK_SHORTCUT_DISPOSITION_UNCHANGED,
  BOOKMARK_SHORTCUT_DISPOSITION_REMOVED,
  BOOKMARK_SHORTCUT_DISPOSITION_OVERRIDE_REQUESTED
};

// Indicates how the bookmark shortcut has been changed by extensions associated
// with |profile|, if at all.
BookmarkShortcutDisposition GetBookmarkShortcutDisposition(Profile* profile) {
#if BUILDFLAG(ENABLE_EXTENSIONS)
  extensions::CommandService* command_service =
      extensions::CommandService::Get(profile);

  extensions::ExtensionRegistry* registry =
      extensions::ExtensionRegistry::Get(profile);
  if (!registry)
    return BOOKMARK_SHORTCUT_DISPOSITION_UNCHANGED;

  const extensions::ExtensionSet& extension_set =
      registry->enabled_extensions();

  // This flag tracks whether any extension wants the disposition to be
  // removed.
  bool removed = false;
  for (extensions::ExtensionSet::const_iterator i = extension_set.begin();
       i != extension_set.end();
       ++i) {
    // Use the overridden disposition if any extension wants it.
    if (command_service->RequestsBookmarkShortcutOverride(i->get()))
      return BOOKMARK_SHORTCUT_DISPOSITION_OVERRIDE_REQUESTED;

    if (!removed &&
        extensions::CommandService::RemovesBookmarkShortcut(i->get())) {
      removed = true;
    }
  }

  if (removed)
    return BOOKMARK_SHORTCUT_DISPOSITION_REMOVED;
#endif
  return BOOKMARK_SHORTCUT_DISPOSITION_UNCHANGED;
}

#if defined(TOOLKIT_VIEWS) && !defined(OS_WIN)
gfx::ImageSkia GetFolderIcon(const gfx::VectorIcon& icon, SkColor text_color) {
  return gfx::CreateVectorIcon(icon,
                               color_utils::DeriveDefaultIconColor(text_color));
}
#endif

}  // namespace

GURL GetURLToBookmark(content::WebContents* web_contents) {
  DCHECK(web_contents);
  return search::IsInstantNTP(web_contents) ? GURL(kChromeUINewTabURL)
                                            : web_contents->GetURL();
}

void GetURLAndTitleToBookmark(content::WebContents* web_contents,
                              GURL* url,
                              base::string16* title) {
  *url = GetURLToBookmark(web_contents);
  *title = web_contents->GetTitle();
}

void ToggleBookmarkBarWhenVisible(content::BrowserContext* browser_context) {
  PrefService* prefs = user_prefs::UserPrefs::Get(browser_context);
  const bool always_show =
      !prefs->GetBoolean(bookmarks::prefs::kShowBookmarkBar);

  // The user changed when the bookmark bar is shown, update the preferences.
  prefs->SetBoolean(bookmarks::prefs::kShowBookmarkBar, always_show);
}

base::string16 FormatBookmarkURLForDisplay(const GURL& url) {
  // Because this gets re-parsed by FixupURL(), it's safe to omit the scheme
  // and trailing slash, and unescape most characters. However, it's
  // important not to drop any username/password, or unescape anything that
  // changes the URL's meaning.
  url_formatter::FormatUrlTypes format_types =
      url_formatter::kFormatUrlOmitDefaults &
      ~url_formatter::kFormatUrlOmitUsernamePassword;

  // If username is present, we must not omit the scheme because FixupURL() will
  // subsequently interpret the username as a scheme. crbug.com/639126
  if (url.has_username())
    format_types &= ~url_formatter::kFormatUrlOmitHTTP;

  return url_formatter::FormatUrl(url, format_types, net::UnescapeRule::SPACES,
                                  nullptr, nullptr, nullptr);
}

bool IsAppsShortcutEnabled(Profile* profile) {
  // Legacy supervised users can not have apps installed currently so there's no
  // need to show the apps shortcut.
  if (profile->IsLegacySupervised())
    return false;

#if defined(OS_CHROMEOS)
  // Chrome OS uses the app list / app launcher.
  return false;
#else
  return search::IsInstantExtendedAPIEnabled() && !profile->IsOffTheRecord();
#endif
}

bool ShouldShowAppsShortcutInBookmarkBar(Profile* profile) {
  return IsAppsShortcutEnabled(profile) &&
         profile->GetPrefs()->GetBoolean(
             bookmarks::prefs::kShowAppsShortcutInBookmarkBar);
}

bool ShouldRemoveBookmarkThisPageUI(Profile* profile) {
  return GetBookmarkShortcutDisposition(profile) ==
         BOOKMARK_SHORTCUT_DISPOSITION_REMOVED;
}

bool ShouldRemoveBookmarkOpenPagesUI(Profile* profile) {
#if BUILDFLAG(ENABLE_EXTENSIONS)
  extensions::ExtensionRegistry* registry =
      extensions::ExtensionRegistry::Get(profile);
  if (!registry)
    return false;

  const extensions::ExtensionSet& extension_set =
      registry->enabled_extensions();

  for (extensions::ExtensionSet::const_iterator i = extension_set.begin();
       i != extension_set.end();
       ++i) {
    if (extensions::CommandService::RemovesBookmarkOpenPagesShortcut(i->get()))
      return true;
  }
#endif

  return false;
}

int GetBookmarkDragOperation(content::BrowserContext* browser_context,
                             const BookmarkNode* node) {
  PrefService* prefs = user_prefs::UserPrefs::Get(browser_context);
  BookmarkModel* model =
      BookmarkModelFactory::GetForBrowserContext(browser_context);

  int move = ui::DragDropTypes::DRAG_MOVE;
  if (!prefs->GetBoolean(bookmarks::prefs::kEditBookmarksEnabled) ||
      !model->client()->CanBeEditedByUser(node)) {
    move = ui::DragDropTypes::DRAG_NONE;
  }
  if (node->is_url())
    return ui::DragDropTypes::DRAG_COPY | ui::DragDropTypes::DRAG_LINK | move;
  return ui::DragDropTypes::DRAG_COPY | move;
}

int GetPreferredBookmarkDropOperation(int source_operations, int operations) {
  int common_ops = (source_operations & operations);
  if (!common_ops)
    return ui::DragDropTypes::DRAG_NONE;
  if (ui::DragDropTypes::DRAG_COPY & common_ops)
    return ui::DragDropTypes::DRAG_COPY;
  if (ui::DragDropTypes::DRAG_LINK & common_ops)
    return ui::DragDropTypes::DRAG_LINK;
  if (ui::DragDropTypes::DRAG_MOVE & common_ops)
    return ui::DragDropTypes::DRAG_MOVE;
  return ui::DragDropTypes::DRAG_NONE;
}

int GetBookmarkDropOperation(Profile* profile,
                             const ui::DropTargetEvent& event,
                             const bookmarks::BookmarkNodeData& data,
                             const BookmarkNode* parent,
                             int index) {
  const base::FilePath& profile_path = profile->GetPath();

  if (data.IsFromProfilePath(profile_path) && data.size() > 1)
    // Currently only accept one dragged node at a time.
    return ui::DragDropTypes::DRAG_NONE;

  if (!IsValidBookmarkDropLocation(profile, data, parent, index))
    return ui::DragDropTypes::DRAG_NONE;

  BookmarkModel* model = BookmarkModelFactory::GetForBrowserContext(profile);
  if (!model->client()->CanBeEditedByUser(parent))
    return ui::DragDropTypes::DRAG_NONE;

  const BookmarkNode* dragged_node =
      data.GetFirstNode(model, profile->GetPath());
  if (dragged_node) {
    // User is dragging from this profile.
    if (!model->client()->CanBeEditedByUser(dragged_node)) {
      // Do a copy instead of a move when dragging bookmarks that the user can't
      // modify.
      return ui::DragDropTypes::DRAG_COPY;
    }
    return ui::DragDropTypes::DRAG_MOVE;
  }

  // User is dragging from another app, copy.
  return GetPreferredBookmarkDropOperation(event.source_operations(),
      ui::DragDropTypes::DRAG_COPY | ui::DragDropTypes::DRAG_LINK);
}

bool IsValidBookmarkDropLocation(Profile* profile,
                                 const bookmarks::BookmarkNodeData& data,
                                 const BookmarkNode* drop_parent,
                                 int index) {
  if (!drop_parent->is_folder()) {
    NOTREACHED();
    return false;
  }

  if (!data.is_valid())
    return false;

  BookmarkModel* model = BookmarkModelFactory::GetForBrowserContext(profile);
  if (!model->client()->CanBeEditedByUser(drop_parent))
    return false;

  const base::FilePath& profile_path = profile->GetPath();
  if (data.IsFromProfilePath(profile_path)) {
    std::vector<const BookmarkNode*> nodes = data.GetNodes(model, profile_path);
    for (size_t i = 0; i < nodes.size(); ++i) {
      // Don't allow the drop if the user is attempting to drop on one of the
      // nodes being dragged.
      const BookmarkNode* node = nodes[i];
      int node_index = (drop_parent == node->parent()) ?
          drop_parent->GetIndexOf(nodes[i]) : -1;
      if (node_index != -1 && (index == node_index || index == node_index + 1))
        return false;

      // drop_parent can't accept a child that is an ancestor.
      if (drop_parent->HasAncestor(node))
        return false;
    }
    return true;
  }
  // From another profile, always accept.
  return true;
}

#if defined(TOOLKIT_VIEWS)
// TODO(bsep): vectorize the Windows versions: crbug.com/564112
gfx::ImageSkia GetBookmarkFolderIcon(SkColor text_color) {
#if defined(OS_WIN)
  return *ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
      IDR_BOOKMARK_BAR_FOLDER);
#elif defined(OS_MACOSX)
  int resource_id = color_utils::IsDark(text_color)
                        ? IDR_BOOKMARK_BAR_FOLDER
                        : IDR_BOOKMARK_BAR_FOLDER_WHITE;
  return *ui::ResourceBundle::GetSharedInstance()
              .GetNativeImageNamed(resource_id)
              .ToImageSkia();
#else
  return GetFolderIcon(ui::MaterialDesignController::touch_ui()
                           ? vector_icons::kFolderTouchIcon
                           : vector_icons::kFolderIcon,
                       text_color);
#endif
}

gfx::ImageSkia GetBookmarkManagedFolderIcon(SkColor text_color) {
#if defined(OS_WIN)
  return *ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
      IDR_BOOKMARK_BAR_FOLDER_MANAGED);
#else
  return GetFolderIcon(ui::MaterialDesignController::touch_ui()
                           ? vector_icons::kFolderManagedTouchIcon
                           : vector_icons::kFolderManagedIcon,
                       text_color);
#endif
}
#endif

}  // namespace chrome