// Copyright (c) 2009 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/gtk/bookmark_bubble_gtk.h"

#include <gtk/gtk.h>

#include "app/l10n_util.h"
#include "app/resource_bundle.h"
#include "base/basictypes.h"
#include "base/logging.h"
#include "base/message_loop.h"
#include "chrome/browser/bookmarks/bookmark_editor.h"
#include "chrome/browser/bookmarks/bookmark_model.h"
#include "chrome/browser/bookmarks/bookmark_utils.h"
#include "chrome/browser/gtk/gtk_chrome_link_button.h"
#include "chrome/browser/gtk/info_bubble_gtk.h"
#include "chrome/browser/metrics/user_metrics.h"
#include "chrome/browser/profile.h"
#include "chrome/common/gtk_util.h"
#include "chrome/common/notification_service.h"
#include "grit/generated_resources.h"

namespace {

// We basically have a singleton, since a bubble is sort of app-modal.  This
// keeps track of the currently open bubble, or NULL if none is open.
BookmarkBubbleGtk* g_bubble = NULL;

// Max number of most recently used folders.
const size_t kMaxMRUFolders = 5;

std::vector<const BookmarkNode*> PopulateFolderCombo(BookmarkModel* model,
                                                     const GURL& url,
                                                     GtkWidget* folder_combo) {
  const BookmarkNode* node = model->GetMostRecentlyAddedNodeForURL(url);
  const BookmarkNode* parent = node->GetParent();
  const BookmarkNode* bookmark_bar = model->GetBookmarkBarNode();
  const BookmarkNode* other = model->other_node();

  // Use + 2 to account for bookmark bar and other node.
  std::vector<const BookmarkNode*> recent_nodes =
      bookmark_utils::GetMostRecentlyModifiedGroups(model, kMaxMRUFolders + 2);

  std::vector<const BookmarkNode*> nodes;
  // Make the parent the first item, unless it's the bookmark bar or other node.
  if (parent != bookmark_bar && parent != other)
    nodes.push_back(parent);

  for (size_t i = 0; i < recent_nodes.size(); ++i) {
    if (recent_nodes[i] != parent &&
        recent_nodes[i] != bookmark_bar &&
        recent_nodes[i] != other) {
      nodes.push_back(recent_nodes[i]);
    }
    // Make sure we only have kMaxMRUFolders in the first chunk.
    if (nodes.size() == kMaxMRUFolders)
      break;
  }

  // And put the bookmark bar and other nodes at the end of the list.
  nodes.push_back(bookmark_bar);
  nodes.push_back(other);

  // We always have nodes + 1 entries in the combo.  The last entry will be
  // the 'Select another folder...' entry that opens the bookmark editor.
  for (size_t i = 0; i < nodes.size(); ++i) {
    gtk_combo_box_append_text(GTK_COMBO_BOX(folder_combo),
                              WideToUTF8(nodes[i]->GetTitle()).c_str());
  }
  gtk_combo_box_append_text(GTK_COMBO_BOX(folder_combo),
      l10n_util::GetStringUTF8(
          IDS_BOOMARK_BUBBLE_CHOOSER_ANOTHER_FOLDER).c_str());

  int parent_index = static_cast<int>(
      std::find(nodes.begin(), nodes.end(), parent) - nodes.begin());
  gtk_combo_box_set_active(GTK_COMBO_BOX(folder_combo), parent_index);

  return nodes;
}

}  // namespace

// static
void BookmarkBubbleGtk::Show(GtkWindow* transient_toplevel,
                             const gfx::Rect& rect,
                             Profile* profile,
                             const GURL& url,
                             bool newly_bookmarked) {
  // TODO(deanm): The Views code deals with the possibility of a bubble already
  // being open, and then it just does nothing.  I am not sure how this could
  // happen with the style of our GTK bubble since it has a grab.  I would also
  // think that closing the previous bubble and opening the new one would make
  // more sense, but I guess then you would commit the bubble's changes.
  DCHECK(!g_bubble);
  g_bubble = new BookmarkBubbleGtk(transient_toplevel, rect, profile,
                                   url, newly_bookmarked);
}

void BookmarkBubbleGtk::InfoBubbleClosing(InfoBubbleGtk* info_bubble,
                                          bool closed_by_escape) {
  if (closed_by_escape) {
    remove_bookmark_ = newly_bookmarked_;
    apply_edits_ = false;
  }

  NotificationService::current()->Notify(
      NotificationType::BOOKMARK_BUBBLE_HIDDEN,
      Source<Profile>(profile_->GetOriginalProfile()),
      NotificationService::NoDetails());
}

BookmarkBubbleGtk::BookmarkBubbleGtk(GtkWindow* transient_toplevel,
                                     const gfx::Rect& rect,
                                     Profile* profile,
                                     const GURL& url,
                                     bool newly_bookmarked)
    : url_(url),
      profile_(profile),
      transient_toplevel_(transient_toplevel),
      content_(NULL),
      name_entry_(NULL),
      folder_combo_(NULL),
      bubble_(NULL),
      factory_(this),
      newly_bookmarked_(newly_bookmarked),
      apply_edits_(true),
      remove_bookmark_(false) {
  GtkWidget* label = gtk_label_new(l10n_util::GetStringUTF8(
      newly_bookmarked_ ? IDS_BOOMARK_BUBBLE_PAGE_BOOKMARKED :
                          IDS_BOOMARK_BUBBLE_PAGE_BOOKMARK).c_str());
  GtkWidget* remove_button = gtk_chrome_link_button_new(
      l10n_util::GetStringUTF8(IDS_BOOMARK_BUBBLE_REMOVE_BOOKMARK).c_str());
  GtkWidget* edit_button = gtk_button_new_with_label(
      l10n_util::GetStringUTF8(IDS_BOOMARK_BUBBLE_OPTIONS).c_str());
  GtkWidget* close_button = gtk_button_new_with_label(
      l10n_util::GetStringUTF8(IDS_CLOSE).c_str());

  // Our content is arrange in 3 rows.  |top| contains a left justified
  // message, and a right justified remove link button.  |table| is the middle
  // portion with the name entry and the folder combo.  |bottom| is the final
  // row with a spacer, and the edit... and close buttons on the right.
  GtkWidget* content = gtk_vbox_new(FALSE, 5);
  GtkWidget* top = gtk_hbox_new(FALSE, 0);

  gtk_misc_set_alignment(GTK_MISC(label), 0, 1);
  gtk_box_pack_start(GTK_BOX(top), label,
                     TRUE, TRUE, 0);
  gtk_box_pack_start(GTK_BOX(top), remove_button,
                     FALSE, FALSE, 0);

  // TODO(deanm): We should show the bookmark bar folder along with the top
  // other choices and an entry to go into the bookmark editor.  Since we don't
  // have the editor up yet on Linux, just show the bookmark bar for now.
  folder_combo_ = gtk_combo_box_new_text();
  folder_nodes_ = PopulateFolderCombo(profile_->GetBookmarkModel(),
                                      url_, folder_combo_);

  // Create the edit entry for updating the bookmark name / title.
  name_entry_ = gtk_entry_new();
  gtk_entry_set_text(GTK_ENTRY(name_entry_), GetTitle().c_str());

  // We use a table to allow the labels to line up with each other, along
  // with the entry and folder combo lining up.
  GtkWidget* table = gtk_util::CreateLabeledControlsGroup(
      l10n_util::GetStringUTF8(IDS_BOOMARK_BUBBLE_TITLE_TEXT).c_str(),
      name_entry_,
      l10n_util::GetStringUTF8(IDS_BOOMARK_BUBBLE_FOLDER_TEXT).c_str(),
      folder_combo_,
      NULL);

  GtkWidget* bottom = gtk_hbox_new(FALSE, 0);
  // We want the buttons on the right, so just use an expanding label to fill
  // all of the extra space on the right.
  gtk_box_pack_start(GTK_BOX(bottom), gtk_label_new(""),
                     TRUE, TRUE, 0);
  gtk_box_pack_start(GTK_BOX(bottom), edit_button,
                     FALSE, FALSE, 4);
  gtk_box_pack_start(GTK_BOX(bottom), close_button,
                     FALSE, FALSE, 0);

  gtk_box_pack_start(GTK_BOX(content), top, TRUE, TRUE, 0);
  gtk_box_pack_start(GTK_BOX(content), table, TRUE, TRUE, 0);
  gtk_box_pack_start(GTK_BOX(content), bottom, TRUE, TRUE, 0);
  // We want the focus to start on the entry, not on the remove button.
  gtk_container_set_focus_child(GTK_CONTAINER(content), table);

  bubble_ = InfoBubbleGtk::Show(transient_toplevel_,
                                rect, content, this);
  if (!bubble_) {
    NOTREACHED();
    return;
  }

  g_signal_connect(content, "destroy",
                   G_CALLBACK(&HandleDestroyThunk), this);
  g_signal_connect(name_entry_, "activate",
                   G_CALLBACK(&HandleNameActivateThunk), this);
  g_signal_connect(folder_combo_, "changed",
                   G_CALLBACK(&HandleFolderChangedThunk), this);
  g_signal_connect(edit_button, "clicked",
                   G_CALLBACK(&HandleEditButtonThunk), this);
  g_signal_connect(close_button, "clicked",
                   G_CALLBACK(&HandleCloseButtonThunk), this);
  g_signal_connect(remove_button, "clicked",
                   G_CALLBACK(&HandleRemoveButtonThunk), this);
}

BookmarkBubbleGtk::~BookmarkBubbleGtk() {
  DCHECK(!content_);  // |content_| should have already been destroyed.

  DCHECK(g_bubble);
  g_bubble = NULL;

  if (apply_edits_) {
    ApplyEdits();
  } else if (remove_bookmark_) {
    BookmarkModel* model = profile_->GetBookmarkModel();
    const BookmarkNode* node = model->GetMostRecentlyAddedNodeForURL(url_);
    if (node)
      model->Remove(node->GetParent(), node->GetParent()->IndexOfChild(node));
  }
}

void BookmarkBubbleGtk::HandleDestroy() {
  // We are self deleting, we have a destroy signal setup to catch when we
  // destroyed (via the InfoBubble being destroyed), and delete ourself.
  content_ = NULL;  // We are being destroyed.
  delete this;
}

void BookmarkBubbleGtk::HandleNameActivate() {
  bubble_->Close();
}

void BookmarkBubbleGtk::HandleFolderChanged() {
  size_t cur_folder = gtk_combo_box_get_active(GTK_COMBO_BOX(folder_combo_));
  if (cur_folder == folder_nodes_.size()) {
    UserMetrics::RecordAction(L"BookmarkBubble_EditFromCombobox", profile_);
    // GTK doesn't handle having the combo box destroyed from the changed
    // signal.  Since showing the editor also closes the bubble, delay this
    // so that GTK can unwind.  Specifically gtk_menu_shell_button_release
    // will run, and we need to keep the combo box alive until then.
    MessageLoop::current()->PostTask(FROM_HERE,
        factory_.NewRunnableMethod(&BookmarkBubbleGtk::ShowEditor));
  }
}

void BookmarkBubbleGtk::HandleEditButton() {
  UserMetrics::RecordAction(L"BookmarkBubble_Edit", profile_);
  ShowEditor();
}

void BookmarkBubbleGtk::HandleCloseButton() {
  bubble_->Close();
}

void BookmarkBubbleGtk::HandleRemoveButton() {
  UserMetrics::RecordAction(L"BookmarkBubble_Unstar", profile_);

  apply_edits_ = false;
  remove_bookmark_ = true;
  bubble_->Close();
}

void BookmarkBubbleGtk::ApplyEdits() {
  // Set this to make sure we don't attempt to apply edits again.
  apply_edits_ = false;

  BookmarkModel* model = profile_->GetBookmarkModel();
  const BookmarkNode* node = model->GetMostRecentlyAddedNodeForURL(url_);
  if (node) {
    // NOTE: Would be nice to save a strlen and use gtk_entry_get_text_length,
    // but it is fairly new and not always in our GTK version.
    const std::wstring new_title(
        UTF8ToWide(gtk_entry_get_text(GTK_ENTRY(name_entry_))));

    if (new_title != node->GetTitle()) {
      model->SetTitle(node, new_title);
      UserMetrics::RecordAction(L"BookmarkBubble_ChangeTitleInBubble",
                                profile_);
    }

    size_t cur_folder = gtk_combo_box_get_active(GTK_COMBO_BOX(folder_combo_));

    // Last index ('Choose another folder...') is not in folder_nodes_.
    if (cur_folder < folder_nodes_.size()) {
      const BookmarkNode* new_parent = folder_nodes_[cur_folder];
      if (new_parent != node->GetParent()) {
        UserMetrics::RecordAction(L"BookmarkBubble_ChangeParent", profile_);
        model->Move(node, new_parent, new_parent->GetChildCount());
      }
    }
  }
}

std::string BookmarkBubbleGtk::GetTitle() {
  BookmarkModel* bookmark_model= profile_->GetBookmarkModel();
  const BookmarkNode* node =
      bookmark_model->GetMostRecentlyAddedNodeForURL(url_);
  if (!node) {
    NOTREACHED();
    return std::string();
  }

  return WideToUTF8(node->GetTitle());
}

void BookmarkBubbleGtk::ShowEditor() {
  const BookmarkNode* node =
      profile_->GetBookmarkModel()->GetMostRecentlyAddedNodeForURL(url_);

  // Commit any edits now.
  ApplyEdits();

  // Closing might delete us, so we'll cache what we want we need on the stack.
  Profile* profile = profile_;
  GtkWidget* toplevel = GTK_WIDGET(transient_toplevel_);

  // Close the bubble, deleting the C++ objects, etc.
  bubble_->Close();

  if (node) {
    BookmarkEditor::Show(toplevel, profile, NULL, node,
                         BookmarkEditor::SHOW_TREE, NULL);
  }
}