Subversion-Projekte lars-tiefland.cienc

// CodeMirror, copyright (c) by Marijn Haverbeke and others

// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {

  if (typeof exports == "object" && typeof module == "object") // CommonJS

    mod(require("../../lib/codemirror"));

  else if (typeof define == "function" && define.amd) // AMD

    define(["../../lib/codemirror"], mod);

  else // Plain browser env

    mod(CodeMirror);

})(function(CodeMirror) {

  "use strict";

  var HINT_ELEMENT_CLASS        = "CodeMirror-hint";

  var ACTIVE_HINT_ELEMENT_CLASS = "CodeMirror-hint-active";

  // This is the old interface, kept around for now to stay

  // backwards-compatible.

  CodeMirror.showHint = function(cm, getHints, options) {

    if (!getHints) return cm.showHint(options);

    if (options && options.async) getHints.async = true;

    var newOpts = {hint: getHints};

    if (options) for (var prop in options) newOpts[prop] = options[prop];

    return cm.showHint(newOpts);

  };

  CodeMirror.defineExtension("showHint", function(options) {

    // We want a single cursor position.

    if (this.listSelections().length > 1 || this.somethingSelected()) return;

    if (this.state.completionActive) this.state.completionActive.close();

    var completion = this.state.completionActive = new Completion(this, options);

    if (!completion.options.hint) return;

    CodeMirror.signal(this, "startCompletion", this);

    completion.update(true);

  });

  function Completion(cm, options) {

    this.cm = cm;

    this.options = this.buildOptions(options);

    this.widget = null;

    this.debounce = 0;

    this.tick = 0;

    this.startPos = this.cm.getCursor();

    this.startLen = this.cm.getLine(this.startPos.line).length;

    var self = this;

    cm.on("cursorActivity", this.activityFunc = function() { self.cursorActivity(); });

  }

  var requestAnimationFrame = window.requestAnimationFrame || function(fn) {

    return setTimeout(fn, 1000/60);

  };

  var cancelAnimationFrame = window.cancelAnimationFrame || clearTimeout;

  Completion.prototype = {

    close: function() {

      if (!this.active()) return;

      this.cm.state.completionActive = null;

      this.tick = null;

      this.cm.off("cursorActivity", this.activityFunc);

      if (this.widget && this.data) CodeMirror.signal(this.data, "close");

      if (this.widget) this.widget.close();

      CodeMirror.signal(this.cm, "endCompletion", this.cm);

    },

    active: function() {

      return this.cm.state.completionActive == this;

    },

    pick: function(data, i) {

      var completion = data.list[i];

      if (completion.hint) completion.hint(this.cm, data, completion);

      else this.cm.replaceRange(getText(completion), completion.from || data.from,

                                completion.to || data.to, "complete");

      CodeMirror.signal(data, "pick", completion);

      this.close();

    },

    cursorActivity: function() {

      if (this.debounce) {

        cancelAnimationFrame(this.debounce);

        this.debounce = 0;

      }

      var pos = this.cm.getCursor(), line = this.cm.getLine(pos.line);

      if (pos.line != this.startPos.line || line.length - pos.ch != this.startLen - this.startPos.ch ||

          pos.ch < this.startPos.ch || this.cm.somethingSelected() ||

          (pos.ch && this.options.closeCharacters.test(line.charAt(pos.ch - 1)))) {

        this.close();

      } else {

        var self = this;

        this.debounce = requestAnimationFrame(function() {self.update();});

        if (this.widget) this.widget.disable();

      }

    },

    update: function(first) {

      if (this.tick == null) return;

      if (!this.options.hint.async) {

        this.finishUpdate(this.options.hint(this.cm, this.options), first);

      } else {

        var myTick = ++this.tick, self = this;

        this.options.hint(this.cm, function(data) {

          if (self.tick == myTick) self.finishUpdate(data, first);

        }, this.options);

      }

    },

    finishUpdate: function(data, first) {

      if (this.data) CodeMirror.signal(this.data, "update");

      if (data && this.data && CodeMirror.cmpPos(data.from, this.data.from)) data = null;

      this.data = data;

      var picked = (this.widget && this.widget.picked) || (first && this.options.completeSingle);

      if (this.widget) this.widget.close();

      if (data && data.list.length) {

        if (picked && data.list.length == 1) {

          this.pick(data, 0);

        } else {

          this.widget = new Widget(this, data);

          CodeMirror.signal(data, "shown");

        }

      }

    },

    buildOptions: function(options) {

      var editor = this.cm.options.hintOptions;

      var out = {};

      for (var prop in defaultOptions) out[prop] = defaultOptions[prop];

      if (editor) for (var prop in editor)

        if (editor[prop] !== undefined) out[prop] = editor[prop];

      if (options) for (var prop in options)

        if (options[prop] !== undefined) out[prop] = options[prop];

      return out;

    }

  };

  function getText(completion) {

    if (typeof completion == "string") return completion;

    else return completion.text;

  }

  function buildKeyMap(completion, handle) {

    var baseMap = {

      Up: function() {handle.moveFocus(-1);},

      Down: function() {handle.moveFocus(1);},

      PageUp: function() {handle.moveFocus(-handle.menuSize() + 1, true);},

      PageDown: function() {handle.moveFocus(handle.menuSize() - 1, true);},

      Home: function() {handle.setFocus(0);},

      End: function() {handle.setFocus(handle.length - 1);},

      Enter: handle.pick,

      Tab: handle.pick,

      Esc: handle.close

    };

    var custom = completion.options.customKeys;

    var ourMap = custom ? {} : baseMap;

    function addBinding(key, val) {

      var bound;

      if (typeof val != "string")

        bound = function(cm) { return val(cm, handle); };

      // This mechanism is deprecated

      else if (baseMap.hasOwnProperty(val))

        bound = baseMap[val];

      else

        bound = val;

      ourMap[key] = bound;

    }

    if (custom)

      for (var key in custom) if (custom.hasOwnProperty(key))

        addBinding(key, custom[key]);

    var extra = completion.options.extraKeys;

    if (extra)

      for (var key in extra) if (extra.hasOwnProperty(key))

        addBinding(key, extra[key]);

    return ourMap;

  }

  function getHintElement(hintsElement, el) {

    while (el && el != hintsElement) {

      if (el.nodeName.toUpperCase() === "LI" && el.parentNode == hintsElement) return el;

      el = el.parentNode;

    }

  }

  function Widget(completion, data) {

    this.completion = completion;

    this.data = data;

    this.picked = false;

    var widget = this, cm = completion.cm;

    var hints = this.hints = document.createElement("ul");

    hints.className = "CodeMirror-hints";

    this.selectedHint = data.selectedHint || 0;

    var completions = data.list;

    for (var i = 0; i < completions.length; ++i) {

      var elt = hints.appendChild(document.createElement("li")), cur = completions[i];

      var className = HINT_ELEMENT_CLASS + (i != this.selectedHint ? "" : " " + ACTIVE_HINT_ELEMENT_CLASS);

      if (cur.className != null) className = cur.className + " " + className;

      elt.className = className;

      if (cur.render) cur.render(elt, data, cur);

      else elt.appendChild(document.createTextNode(cur.displayText || getText(cur)));

      elt.hintId = i;

    }

    var pos = cm.cursorCoords(completion.options.alignWithWord ? data.from : null);

    var left = pos.left, top = pos.bottom, below = true;

    hints.style.left = left + "px";

    hints.style.top = top + "px";

    // If we're at the edge of the screen, then we want the menu to appear on the left of the cursor.

    var winW = window.innerWidth || Math.max(document.body.offsetWidth, document.documentElement.offsetWidth);

    var winH = window.innerHeight || Math.max(document.body.offsetHeight, document.documentElement.offsetHeight);

    (completion.options.container || document.body).appendChild(hints);

    var box = hints.getBoundingClientRect(), overlapY = box.bottom - winH;

    if (overlapY > 0) {

      var height = box.bottom - box.top, curTop = pos.top - (pos.bottom - box.top);

      if (curTop - height > 0) { // Fits above cursor

        hints.style.top = (top = pos.top - height) + "px";

        below = false;

      } else if (height > winH) {

        hints.style.height = (winH - 5) + "px";

        hints.style.top = (top = pos.bottom - box.top) + "px";

        var cursor = cm.getCursor();

        if (data.from.ch != cursor.ch) {

          pos = cm.cursorCoords(cursor);

          hints.style.left = (left = pos.left) + "px";

          box = hints.getBoundingClientRect();

        }

      }

    }

    var overlapX = box.right - winW;

    if (overlapX > 0) {

      if (box.right - box.left > winW) {

        hints.style.width = (winW - 5) + "px";

        overlapX -= (box.right - box.left) - winW;

      }

      hints.style.left = (left = pos.left - overlapX) + "px";

    }

    cm.addKeyMap(this.keyMap = buildKeyMap(completion, {

      moveFocus: function(n, avoidWrap) { widget.changeActive(widget.selectedHint + n, avoidWrap); },

      setFocus: function(n) { widget.changeActive(n); },

      menuSize: function() { return widget.screenAmount(); },

      length: completions.length,

      close: function() { completion.close(); },

      pick: function() { widget.pick(); },

      data: data

    }));

    if (completion.options.closeOnUnfocus) {

      var closingOnBlur;

      cm.on("blur", this.onBlur = function() { closingOnBlur = setTimeout(function() { completion.close(); }, 100); });

      cm.on("focus", this.onFocus = function() { clearTimeout(closingOnBlur); });

    }

    var startScroll = cm.getScrollInfo();

    cm.on("scroll", this.onScroll = function() {

      var curScroll = cm.getScrollInfo(), editor = cm.getWrapperElement().getBoundingClientRect();

      var newTop = top + startScroll.top - curScroll.top;

      var point = newTop - (window.pageYOffset || (document.documentElement || document.body).scrollTop);

      if (!below) point += hints.offsetHeight;

      if (point <= editor.top || point >= editor.bottom) return completion.close();

      hints.style.top = newTop + "px";

      hints.style.left = (left + startScroll.left - curScroll.left) + "px";

    });

    CodeMirror.on(hints, "dblclick", function(e) {

      var t = getHintElement(hints, e.target || e.srcElement);

      if (t && t.hintId != null) {widget.changeActive(t.hintId); widget.pick();}

    });

    CodeMirror.on(hints, "click", function(e) {

      var t = getHintElement(hints, e.target || e.srcElement);

      if (t && t.hintId != null) {

        widget.changeActive(t.hintId);

        if (completion.options.completeOnSingleClick) widget.pick();

      }

    });

    CodeMirror.on(hints, "mousedown", function() {

      setTimeout(function(){cm.focus();}, 20);

    });

    CodeMirror.signal(data, "select", completions[0], hints.firstChild);

    return true;

  }

  Widget.prototype = {

    close: function() {

      if (this.completion.widget != this) return;

      this.completion.widget = null;

      this.hints.parentNode.removeChild(this.hints);

      this.completion.cm.removeKeyMap(this.keyMap);

      var cm = this.completion.cm;

      if (this.completion.options.closeOnUnfocus) {

        cm.off("blur", this.onBlur);

        cm.off("focus", this.onFocus);

      }

      cm.off("scroll", this.onScroll);

    },

    disable: function() {

      this.completion.cm.removeKeyMap(this.keyMap);

      var widget = this;

      this.keyMap = {Enter: function() { widget.picked = true; }};

      this.completion.cm.addKeyMap(this.keyMap);

    },

    pick: function() {

      this.completion.pick(this.data, this.selectedHint);

    },

    changeActive: function(i, avoidWrap) {

      if (i >= this.data.list.length)

        i = avoidWrap ? this.data.list.length - 1 : 0;

      else if (i < 0)

        i = avoidWrap ? 0  : this.data.list.length - 1;

      if (this.selectedHint == i) return;

      var node = this.hints.childNodes[this.selectedHint];

      node.className = node.className.replace(" " + ACTIVE_HINT_ELEMENT_CLASS, "");

      node = this.hints.childNodes[this.selectedHint = i];

      node.className += " " + ACTIVE_HINT_ELEMENT_CLASS;

      if (node.offsetTop < this.hints.scrollTop)

        this.hints.scrollTop = node.offsetTop - 3;

      else if (node.offsetTop + node.offsetHeight > this.hints.scrollTop + this.hints.clientHeight)

        this.hints.scrollTop = node.offsetTop + node.offsetHeight - this.hints.clientHeight + 3;

      CodeMirror.signal(this.data, "select", this.data.list[this.selectedHint], node);

    },

    screenAmount: function() {

      return Math.floor(this.hints.clientHeight / this.hints.firstChild.offsetHeight) || 1;

    }

  };

  CodeMirror.registerHelper("hint", "auto", function(cm, options) {

    var helpers = cm.getHelpers(cm.getCursor(), "hint"), words;

    if (helpers.length) {

      for (var i = 0; i < helpers.length; i++) {

        var cur = helpers[i](cm, options);

        if (cur && cur.list.length) return cur;

      }

    } else if (words = cm.getHelper(cm.getCursor(), "hintWords")) {

      if (words) return CodeMirror.hint.fromList(cm, {words: words});

    } else if (CodeMirror.hint.anyword) {

      return CodeMirror.hint.anyword(cm, options);

    }

  });

  CodeMirror.registerHelper("hint", "fromList", function(cm, options) {

    var cur = cm.getCursor(), token = cm.getTokenAt(cur);

    var to = CodeMirror.Pos(cur.line, token.end);

    if (token.string && /\w/.test(token.string[token.string.length - 1])) {

      var term = token.string, from = CodeMirror.Pos(cur.line, token.start);

    } else {

      var term = "", from = to;

    }

    var found = [];

    for (var i = 0; i < options.words.length; i++) {

      var word = options.words[i];

      if (word.slice(0, term.length) == term)

        found.push(word);

    }

    if (found.length) return {list: found, from: from, to: to};

  });

  CodeMirror.commands.autocomplete = CodeMirror.showHint;

  var defaultOptions = {

    hint: CodeMirror.hint.auto,

    completeSingle: true,

    alignWithWord: true,

    closeCharacters: /[\s()\[\]{};:>,]/,

    closeOnUnfocus: true,

    completeOnSingleClick: false,

    container: null,

    customKeys: null,

    extraKeys: null

  };

  CodeMirror.defineOption("hintOptions", null);

});