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// Copyright 2008 The Closure Library Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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//      http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS-IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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 * @fileoverview Handles applying header styles to text.
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 *
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 */
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goog.provide('goog.editor.plugins.HeaderFormatter');
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goog.require('goog.editor.Command');
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goog.require('goog.editor.Plugin');
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goog.require('goog.userAgent');
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/**
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 * Applies header styles to text.
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 * @constructor
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 * @extends {goog.editor.Plugin}
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 * @final
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 */
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goog.editor.plugins.HeaderFormatter = function() {
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  goog.editor.Plugin.call(this);
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};
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goog.inherits(goog.editor.plugins.HeaderFormatter, goog.editor.Plugin);
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/** @override */
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goog.editor.plugins.HeaderFormatter.prototype.getTrogClassId = function() {
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  return 'HeaderFormatter';
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};
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// TODO(user):  Move execCommand functionality from basictextformatter into
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// here for headers.  I'm not doing this now because it depends on the
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// switch statements in basictextformatter and we'll need to abstract that out
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// in order to separate out any of the functions from basictextformatter.
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/**
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 * Commands that can be passed as the optional argument to execCommand.
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 * @enum {string}
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 */
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goog.editor.plugins.HeaderFormatter.HEADER_COMMAND = {
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  H1: 'H1',
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  H2: 'H2',
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  H3: 'H3',
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  H4: 'H4'
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};
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/**
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 * @override
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 */
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goog.editor.plugins.HeaderFormatter.prototype.handleKeyboardShortcut = function(
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    e, key, isModifierPressed) {
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  if (!isModifierPressed) {
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    return false;
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  }
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  var command = null;
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  switch (key) {
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    case '1':
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      command = goog.editor.plugins.HeaderFormatter.HEADER_COMMAND.H1;
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      break;
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    case '2':
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      command = goog.editor.plugins.HeaderFormatter.HEADER_COMMAND.H2;
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      break;
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    case '3':
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      command = goog.editor.plugins.HeaderFormatter.HEADER_COMMAND.H3;
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      break;
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    case '4':
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      command = goog.editor.plugins.HeaderFormatter.HEADER_COMMAND.H4;
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      break;
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  }
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  if (command) {
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    this.getFieldObject().execCommand(
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        goog.editor.Command.FORMAT_BLOCK, command);
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    // Prevent default isn't enough to cancel tab navigation in FF.
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    if (goog.userAgent.GECKO) {
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      e.stopPropagation();
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    }
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    return true;
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  }
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  return false;
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};
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