/* ***** BEGIN LICENSE BLOCK *****
 * This file is part of DotClear.
 * Copyright (c) 2005 Nicolas Martin & Olivier Meunier and contributors. All
 * rights reserved.
 *
 * DotClear is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * DotClear is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with DotClear; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * ***** END LICENSE BLOCK *****
*/

/* Modified by JP LANG for textile formatting */

function jsToolBar(textarea) {
  if (!document.createElement) { return; }

  if (!textarea) { return; }

  if ((typeof(document["selection"]) == "undefined")
  && (typeof(textarea["setSelectionRange"]) == "undefined")) {
    return;
  }

  this.textarea = textarea;

  this.editor = document.createElement('div');
  this.editor.className = 'jstEditor';

  this.textarea.parentNode.insertBefore(this.editor,this.textarea);
  this.editor.appendChild(this.textarea);

  this.toolbar = document.createElement("div");
  this.toolbar.className = 'jstElements';
  this.editor.parentNode.insertBefore(this.toolbar,this.editor);

  // Dragable resizing (only for gecko)
  if (this.editor.addEventListener)
  {
    this.handle = document.createElement('div');
    this.handle.className = 'jstHandle';
    var dragStart = this.resizeDragStart;
    var This = this;
    this.handle.addEventListener('mousedown',function(event) { dragStart.call(This,event); },false);
    // fix memory leak in Firefox (bug #241518)
    window.addEventListener('unload',function() {
        var del = This.handle.parentNode.removeChild(This.handle);
        delete(This.handle);
    },false);

    this.editor.parentNode.insertBefore(this.handle,this.editor.nextSibling);
  }

  this.context = null;
  this.toolNodes = {}; // lorsque la toolbar est dessinée , cet objet est garni
          // de raccourcis vers les éléments DOM correspondants aux outils.
}

function jsButton(title, fn, scope, className) {
    if(typeof jsToolBar.strings == 'undefined') {
      this.title = title || null;
    } else {
      this.title = jsToolBar.strings[title] || title || null;
    }
  this.fn = fn || function(){};
  this.scope = scope || null;
  this.className = className || null;
}
jsButton.prototype.draw = function() {
  if (!this.scope) return null;

  var button = document.createElement('button');
  button.setAttribute('type','button');
  button.setAttribute('aria-label', this.title);
  if (this.className) button.className = this.className;
  button.title = this.title;

  if (this.icon != undefined) {
    button.style.backgroundImage = 'url('+this.icon+')';
  }
  if (typeof(this.fn) == 'function') {
    var This = this;
    button.onclick = function() { try { This.fn.apply(This.scope, arguments) } catch (e) {} return false; };
  }
  return button;
};

function jsSpace(id) {
  this.id = id || null;
  this.width = null;
}
jsSpace.prototype.draw = function() {
  var span = document.createElement('span');
  if (this.id) span.id = this.id;
  span.appendChild(document.createTextNode(String.fromCharCode(160)));
  span.className = 'jstSpacer';
  if (this.width) span.style.marginRight = this.width+'px';

  return span;
};

function jsCombo(title, options, scope, fn, className) {
  this.title = title || null;
  this.options = options || null;
  this.scope = scope || null;
  this.fn = fn || function(){};
  this.className = className || null;
}
jsCombo.prototype.draw = function() {
  if (!this.scope || !this.options) return null;

  var select = document.createElement('select');
  if (this.className) select.className = className;
  select.title = this.title;

  for (var o in this.options) {
    //var opt = this.options[o];
    var option = document.createElement('option');
    option.value = o;
    option.appendChild(document.createTextNode(this.options[o]));
    select.appendChild(option);
  }

  var This = this;
  select.onchange = function() {
    try {
      This.fn.call(This.scope, this.value);
    } catch (e) { alert(e); }

    return false;
  };

  return select;
};


jsToolBar.prototype = {
  base_url: '',
  mode: 'wiki',
  elements: {},
  help_link: '',

  getMode: function() {
    return this.mode;
  },

  setMode: function(mode) {
    this.mode = mode || 'wiki';
  },

  switchMode: function(mode) {
    mode = mode || 'wiki';
    this.draw(mode);
  },

  setHelpLink: function(link) {
    this.help_link = link;
  },

  button: function(toolName) {
    var tool = this.elements[toolName];
    if (typeof tool.fn[this.mode] != 'function') return null;
    var b = new jsButton(tool.title, tool.fn[this.mode], this, 'icon-small jstb_'+toolName);
    if (tool.icon != undefined) b.icon = tool.icon;
    return b;
  },
  space: function(toolName) {
    var tool = new jsSpace(toolName);
    if (this.elements[toolName].width !== undefined)
      tool.width = this.elements[toolName].width;
    return tool;
  },
  combo: function(toolName) {
    var tool = this.elements[toolName];
    var length = tool[this.mode].list.length;

    if (typeof tool[this.mode].fn != 'function' || length == 0) {
      return null;
    } else {
      var options = {};
      for (var i=0; i < length; i++) {
        var opt = tool[this.mode].list[i];
        options[opt] = tool.options[opt];
      }
      return new jsCombo(tool.title, options, this, tool[this.mode].fn);
    }
  },
  draw: function(mode) {
    this.setMode(mode);

    // Empty toolbar
    while (this.toolbar.hasChildNodes()) {
      this.toolbar.removeChild(this.toolbar.firstChild)
    }
    this.toolNodes = {}; // vide les raccourcis DOM/**/

    // Draw toolbar elements
    var b, tool, newTool;

    for (var i in this.elements) {
      b = this.elements[i];

      var disabled =
      b.type == undefined || b.type == ''
      || (b.disabled != undefined && b.disabled)
      || (b.context != undefined && b.context != null && b.context != this.context);

      if (!disabled && typeof this[b.type] == 'function') {
        tool = this[b.type](i);
        if (tool) newTool = tool.draw();
        if (newTool) {
          this.toolNodes[i] = newTool; //mémorise l'accès DOM pour usage éventuel ultérieur
          this.toolbar.appendChild(newTool);
        }
      }
    }
    this.toolbar.appendChild(this.help_link);
  },

  singleTag: function(stag,etag) {
    stag = stag || null;
    etag = etag || stag;

    if (!stag || !etag) { return; }

    this.encloseSelection(stag,etag);
  },

  encloseLineSelection: function (prefix, suffix, fn) {
      this.textarea.focus();
      prefix = prefix || '';
      suffix = suffix || '';
      var start, end, sel, scrollPos, subst, res;
      if (typeof(document["selection"]) != "undefined") {
        // just makes it work in IE8 somehow
        var helperRange = document.selection.createRange();
        var bookmark = helperRange.getBookmark();
        var origParent = helperRange.parentElement();
        var moveStart = 0;
        // we move the starting point of the selection to the last newline
        // and track the number of movements
        try {
          while (helperRange.text[0] != "\n" && helperRange.text[0] != "\r") {
            helperRange.moveStart("character", -1);
            if (origParent != helperRange.parentElement()) {
              throw "Outside of Textarea";
            }
            moveStart -= 1;
          }
          moveStart += 1;
        } catch(err) {
          if (err != "Outside of Textarea")
            throw err;
        }
        var range = document.selection.createRange();
        range.moveStart("character", moveStart);
        if (range.text.match(/ $/))
          range.moveEnd("character", -1);
        sel = range.text;
      } else if (typeof(this.textarea["setSelectionRange"]) != "undefined") {
          start = this.textarea.selectionStart;
          end = this.textarea.selectionEnd;
          scrollPos = this.textarea.scrollTop;
          // go to the start of the line
          start = this.textarea.value.substring(0, start).replace(/[^\r\n]*$/g,'').length;
          // go to the end of the line
          end = this.textarea.value.length - this.textarea.value.substring(end, this.textarea.value.length).replace(/^[^\r\n]*/, '').length;
          sel = this.textarea.value.substring(start, end);
      }
      if (sel.match(/ $/)) {
          sel = sel.substring(0, sel.length - 1);
          suffix = suffix + " ";
      }
      if (typeof(fn) == 'function') {
          res = (sel) ? fn.call(this, sel) : fn('');
      } else {
          res = (sel) ? sel : '';
      }
      subst = prefix + res + suffix;
      if (typeof(document["selection"]) != "undefined") {
          range.text = subst;
          this.textarea.caretPos -= suffix.length;
      } else if (typeof(this.textarea["setSelectionRange"]) != "undefined") {
          var cursorPosition = start;
          this.textarea.value = this.textarea.value.substring(0, start) + subst + this.textarea.value.substring(end);
          if (sel) {
              cursorPosition += subst.length;
          } else {
              cursorPosition += prefix.length + res.length;
          }
          this.textarea.setSelectionRange(cursorPosition, cursorPosition);
          this.textarea.scrollTop = scrollPos;
      }
  },

  encloseSelection: function (prefix, suffix, fn) {
      this.textarea.focus();
      prefix = prefix || '';
      suffix = suffix || '';
      var start, end, sel, scrollPos, subst, res;
      if (typeof(document["selection"]) != "undefined") {
          sel = document.selection.createRange().text;
      } else if (typeof(this.textarea["setSelectionRange"]) != "undefined") {
          start = this.textarea.selectionStart;
          end = this.textarea.selectionEnd;
          scrollPos = this.textarea.scrollTop;
          sel = this.textarea.value.substring(start, end);
      }
      if (sel.match(/ $/)) {
          sel = sel.substring(0, sel.length - 1);
          suffix = suffix + " ";
      }
      if (typeof(fn) == 'function') {
          res = (sel) ? fn.call(this, sel) : fn('');
      } else {
          res = (sel) ? sel : '';
      }
      subst = prefix + res + suffix;
      if (typeof(document["selection"]) != "undefined") {
          var range = document.selection.createRange().text = subst;
          this.textarea.caretPos -= suffix.length;
      } else if (typeof(this.textarea["setSelectionRange"]) != "undefined") {
          this.textarea.value = this.textarea.value.substring(0, start) + subst + this.textarea.value.substring(end);
          if (sel) {
              this.textarea.setSelectionRange(start + subst.length, start + subst.length);
          } else {
              this.textarea.setSelectionRange(start + prefix.length, start + prefix.length);
          }
          this.textarea.scrollTop = scrollPos;
      }
  },

  stripBaseURL: function(url) {
    if (this.base_url != '') {
      var pos = url.indexOf(this.base_url);
      if (pos == 0) {
        url = url.substr(this.base_url.length);
      }
    }

    return url;
  }
};

/** Resizer
-------------------------------------------------------- */
jsToolBar.prototype.resizeSetStartH = function() {
  this.dragStartH = this.textarea.offsetHeight + 0;
};
jsToolBar.prototype.resizeDragStart = function(event) {
  var This = this;
  this.dragStartY = event.clientY;
  this.resizeSetStartH();
  document.addEventListener('mousemove', this.dragMoveHdlr=function(event){This.resizeDragMove(event);}, false);
  document.addEventListener('mouseup', this.dragStopHdlr=function(event){This.resizeDragStop(event);}, false);
};

jsToolBar.prototype.resizeDragMove = function(event) {
  this.textarea.style.height = (this.dragStartH+event.clientY-this.dragStartY)+'px';
};

jsToolBar.prototype.resizeDragStop = function(event) {
  document.removeEventListener('mousemove', this.dragMoveHdlr, false);
  document.removeEventListener('mouseup', this.dragStopHdlr, false);
};