common/textarea.js

   1 // Copyright (c) 2012 Google, Inc.
   2 //
   3 // Permission is hereby granted, free of charge, to any person obtaining a copy
   4 // of this software and associated documentation files (the "Software"), to deal
   5 // in the Software without restriction, including without limitation the rights
   6 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   7 // copies of the Software, and to permit persons to whom the Software is
   8 // furnished to do so, subject to the following conditions:
   9 //
  10 // The above copyright notice and this permission notice shall be included in
  11 // all copies or substantial portions of the Software.
  12 //
  13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  16 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  17 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  18 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  19 // THE SOFTWARE.
  20
  21 /**
  22  * @fileoverview Dygraphs options palette text area.
  23  *
  24  * @author konigsberg@google.com (Robert Konigsberg)
  25  */
  26 "use strict";
  27
  28 function TextArea(parent) {
  29   var body = document.getElementsByTagName("body")[0];
  30   if (!parent) {
  31     parent = body;
  32   }
  33   this.elem = TextArea.createChild("div", parent, "textarea");
  34   this.title = TextArea.createChild("div", this.elem, "title");
  35   this.textarea = TextArea.createChild("textarea", this.elem, "editor");
  36   this.buttons = TextArea.createChild("div", this.elem, "buttons");
  37   this.ok = TextArea.createChild("button", this.buttons);
  38   this.ok.textContent = "OK";
  39   this.cancel = TextArea.createChild("button", this.buttons);
  40   this.cancel.textContent = "Cancel";
  41   this.height = 315;
  42   this.width = 445;
  43
  44   var textarea = this;
  45   this.ok.onclick = function() {
  46     textarea.hide();
  47     textarea.okCallback(textarea.textarea.value);
  48   };
  49   this.cancel.onclick = function() {
  50     textarea.hide();
  51     textarea.cancelCallback();
  52   };
  53   this.reposition = function() {
  54     var left = (document.documentElement.clientWidth - textarea.elem.offsetWidth) / 2;
  55     var top = (document.documentElement.clientHeight - textarea.elem.offsetHeight) / 2;
  56     textarea.elem.style.left = Math.max(left, 0) + "px";
  57     textarea.elem.style.top = Math.max(top, 0) + "px";
  58   }
  59
  60   this.background = TextArea.createChild("div", body, "background");
  61   this.background.id = "modalBackground";
  62   this.hide();
  63 }
  64
  65 /* I think this is the third place I've copied this function */
  66 TextArea.createChild = function(type, parent, className) {
  67   var elem = document.createElement(type);
  68   parent.appendChild(elem);
  69   if (className) {
  70     elem.className = className;
  71   }
  72   return elem;
  73 };
  74
  75 TextArea.prototype.cancelCallback = function() {
  76 };
  77
  78 TextArea.prototype.okCallback = function(content) {
  79 };
  80
  81 TextArea.prototype.show = function(title, content) {
  82   this.title.textContent = title;
  83   this.textarea.value = content;
  84
  85   var sums = function(adds, subtracts, field) {
  86     var total = 0;
  87     for (var idx in adds) {
  88       total += parseInt(adds[idx][field]);
  89     }
  90     for (var idx2 in subtracts) {
  91       total -= parseInt(subtracts[idx2][field]);
  92     }
  93     return total;
  94   }
  95   this.elem.style.display = "block";
  96   this.background.style.display = "block";
  97
  98   this.elem.style.height = this.height + "px";
  99   this.elem.style.width = this.width + "px";
 100
 101   this.textarea.style.height = (-18 + sums([this.elem], [this.title, this.buttons], "offsetHeight")) + "px";
 102   this.textarea.style.width = (-16 + sums([this.elem], [ ], "offsetWidth")) + "px";
 103
 104   var textarea = this;
 105
 106   this.keyDownListener_ = function(event) {
 107     if(event.keyCode == 13) { // enter / return
 108       textarea.hide();
 109     }
 110     if(event.keyCode == 27) { // esc
 111       textarea.hide();
 112     }
 113   }
 114
 115   document.addEventListener("keydown", this.keyDownListener_);
 116   this.reposition();
 117   window.addEventListener('resize', this.reposition, false);
 118   document.documentElement.addEventListener('onscroll', this.reposition);
 119 }
 120
 121 TextArea.prototype.hide = function() {
 122   document.removeEventListener('keypress', this.keyDownListener_);
 123   this.keyDownListener_ = null;
 124   this.elem.style.display = "none";
 125   this.background.style.display = "none";
 126   window.removeEventListener("resize", this.reposition);
 127   document.documentElement.removeEventListener("onscroll", this.reposition);
 128 }