github.com/elliott5/community@v0.14.1-0.20160709191136-823126fb026a/app/public/codemirror/addon/display/panel.js (about)

     1  // CodeMirror, copyright (c) by Marijn Haverbeke and others
     2  // Distributed under an MIT license: http://codemirror.net/LICENSE
     3  
     4  (function(mod) {
     5    if (typeof exports == "object" && typeof module == "object") // CommonJS
     6      mod(require("../../lib/codemirror"));
     7    else if (typeof define == "function" && define.amd) // AMD
     8      define(["../../lib/codemirror"], mod);
     9    else // Plain browser env
    10      mod(CodeMirror);
    11  })(function(CodeMirror) {
    12    CodeMirror.defineExtension("addPanel", function(node, options) {
    13      options = options || {};
    14  
    15      if (!this.state.panels) initPanels(this);
    16  
    17      var info = this.state.panels;
    18      var wrapper = info.wrapper;
    19      var cmWrapper = this.getWrapperElement();
    20  
    21      if (options.after instanceof Panel && !options.after.cleared) {
    22        wrapper.insertBefore(node, options.before.node.nextSibling);
    23      } else if (options.before instanceof Panel && !options.before.cleared) {
    24        wrapper.insertBefore(node, options.before.node);
    25      } else if (options.replace instanceof Panel && !options.replace.cleared) {
    26        wrapper.insertBefore(node, options.replace.node);
    27        options.replace.clear();
    28      } else if (options.position == "bottom") {
    29        wrapper.appendChild(node);
    30      } else if (options.position == "before-bottom") {
    31        wrapper.insertBefore(node, cmWrapper.nextSibling);
    32      } else if (options.position == "after-top") {
    33        wrapper.insertBefore(node, cmWrapper);
    34      } else {
    35        wrapper.insertBefore(node, wrapper.firstChild);
    36      }
    37  
    38      var height = (options && options.height) || node.offsetHeight;
    39      this._setSize(null, info.heightLeft -= height);
    40      info.panels++;
    41      return new Panel(this, node, options, height);
    42    });
    43  
    44    function Panel(cm, node, options, height) {
    45      this.cm = cm;
    46      this.node = node;
    47      this.options = options;
    48      this.height = height;
    49      this.cleared = false;
    50    }
    51  
    52    Panel.prototype.clear = function() {
    53      if (this.cleared) return;
    54      this.cleared = true;
    55      var info = this.cm.state.panels;
    56      this.cm._setSize(null, info.heightLeft += this.height);
    57      info.wrapper.removeChild(this.node);
    58      if (--info.panels == 0) removePanels(this.cm);
    59    };
    60  
    61    Panel.prototype.changed = function(height) {
    62      var newHeight = height == null ? this.node.offsetHeight : height;
    63      var info = this.cm.state.panels;
    64      this.cm._setSize(null, info.height += (newHeight - this.height));
    65      this.height = newHeight;
    66    };
    67  
    68    function initPanels(cm) {
    69      var wrap = cm.getWrapperElement();
    70      var style = window.getComputedStyle ? window.getComputedStyle(wrap) : wrap.currentStyle;
    71      var height = parseInt(style.height);
    72      var info = cm.state.panels = {
    73        setHeight: wrap.style.height,
    74        heightLeft: height,
    75        panels: 0,
    76        wrapper: document.createElement("div")
    77      };
    78      wrap.parentNode.insertBefore(info.wrapper, wrap);
    79      var hasFocus = cm.hasFocus();
    80      info.wrapper.appendChild(wrap);
    81      if (hasFocus) cm.focus();
    82  
    83      cm._setSize = cm.setSize;
    84      if (height != null) cm.setSize = function(width, newHeight) {
    85        if (newHeight == null) return this._setSize(width, newHeight);
    86        info.setHeight = newHeight;
    87        if (typeof newHeight != "number") {
    88          var px = /^(\d+\.?\d*)px$/.exec(newHeight);
    89          if (px) {
    90            newHeight = Number(px[1]);
    91          } else {
    92            info.wrapper.style.height = newHeight;
    93            newHeight = info.wrapper.offsetHeight;
    94            info.wrapper.style.height = "";
    95          }
    96        }
    97        cm._setSize(width, info.heightLeft += (newHeight - height));
    98        height = newHeight;
    99      };
   100    }
   101  
   102    function removePanels(cm) {
   103      var info = cm.state.panels;
   104      cm.state.panels = null;
   105  
   106      var wrap = cm.getWrapperElement();
   107      info.wrapper.parentNode.replaceChild(wrap, info.wrapper);
   108      wrap.style.height = info.setHeight;
   109      cm.setSize = cm._setSize;
   110      cm.setSize();
   111    }
   112  });