orbit-basic/app/assets/javascripts/codemirror/addon/hint/show-hint.js

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JavaScript
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2013-07-22 08:31:44 +00:00
(function() {
"use strict";
CodeMirror.showHint = function(cm, getHints, options) {
// We want a single cursor position.
if (cm.somethingSelected()) return;
if (cm.state.completionActive) cm.state.completionActive.close();
var completion = cm.state.completionActive = new Completion(cm, getHints, options || {});
CodeMirror.signal(cm, "startCompletion", cm);
if (completion.options.async)
getHints(cm, function(hints) { completion.showHints(hints); }, completion.options);
else
return completion.showHints(getHints(cm, completion.options));
};
function Completion(cm, getHints, options) {
this.cm = cm;
this.getHints = getHints;
this.options = options;
this.widget = this.onClose = null;
}
Completion.prototype = {
close: function() {
if (!this.active()) return;
if (this.widget) this.widget.close();
if (this.onClose) this.onClose();
this.cm.state.completionActive = null;
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), data.from, data.to);
this.close();
},
showHints: function(data) {
if (!data || !data.list.length || !this.active()) return this.close();
if (this.options.completeSingle != false && data.list.length == 1)
this.pick(data, 0);
else
this.showWidget(data);
},
showWidget: function(data) {
this.widget = new Widget(this, data);
CodeMirror.signal(data, "shown");
var debounce = null, completion = this, finished;
var closeOn = this.options.closeCharacters || /[\s()\[\]{};:>,]/;
var startPos = this.cm.getCursor(), startLen = this.cm.getLine(startPos.line).length;
function done() {
if (finished) return;
finished = true;
completion.close();
completion.cm.off("cursorActivity", activity);
CodeMirror.signal(data, "close");
}
function isDone() {
if (finished) return true;
if (!completion.widget) { done(); return true; }
}
function update() {
if (isDone()) return;
if (completion.options.async)
completion.getHints(completion.cm, finishUpdate, completion.options);
else
finishUpdate(completion.getHints(completion.cm, completion.options));
}
function finishUpdate(data) {
if (isDone()) return;
if (!data || !data.list.length) return done();
completion.widget.close();
completion.widget = new Widget(completion, data);
}
function activity() {
clearTimeout(debounce);
var pos = completion.cm.getCursor(), line = completion.cm.getLine(pos.line);
if (pos.line != startPos.line || line.length - pos.ch != startLen - startPos.ch ||
pos.ch < startPos.ch || completion.cm.somethingSelected() ||
(pos.ch && closeOn.test(line.charAt(pos.ch - 1))))
completion.close();
else
debounce = setTimeout(update, 170);
}
this.cm.on("cursorActivity", activity);
this.onClose = done;
}
};
function getText(completion) {
if (typeof completion == "string") return completion;
else return completion.text;
}
function buildKeyMap(options, handle) {
var baseMap = {
Up: function() {handle.moveFocus(-1);},
Down: function() {handle.moveFocus(1);},
PageUp: function() {handle.moveFocus(-handle.menuSize());},
PageDown: function() {handle.moveFocus(handle.menuSize());},
Home: function() {handle.setFocus(0);},
End: function() {handle.setFocus(handle.length);},
Enter: handle.pick,
Tab: handle.pick,
Esc: handle.close
};
var ourMap = options.customKeys ? {} : 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 (options.customKeys)
for (var key in options.customKeys) if (options.customKeys.hasOwnProperty(key))
addBinding(key, options.customKeys[key]);
if (options.extraKeys)
for (var key in options.extraKeys) if (options.extraKeys.hasOwnProperty(key))
addBinding(key, options.extraKeys[key]);
return ourMap;
}
function Widget(completion, data) {
this.completion = completion;
this.data = data;
var widget = this, cm = completion.cm, options = completion.options;
var hints = this.hints = document.createElement("ul");
hints.className = "CodeMirror-hints";
this.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 = "CodeMirror-hint" + (i ? "" : " CodeMirror-hint-active");
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(options.alignWithWord !== false ? 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);
var box = hints.getBoundingClientRect();
var overlapX = box.right - winW, overlapY = box.bottom - winH;
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";
}
if (overlapY > 0) {
var height = box.bottom - box.top;
if (box.top - (pos.bottom - pos.top) - height > 0) {
overlapY = height + (pos.bottom - pos.top);
below = false;
} else if (height > winH) {
hints.style.height = (winH - 5) + "px";
overlapY -= height - winH;
}
hints.style.top = (top = pos.bottom - overlapY) + "px";
}
(options.container || document.body).appendChild(hints);
cm.addKeyMap(this.keyMap = buildKeyMap(options, {
moveFocus: function(n) { widget.changeActive(widget.selectedHint + n); },
setFocus: function(n) { widget.changeActive(n); },
menuSize: function() { return widget.screenAmount(); },
length: completions.length,
close: function() { completion.close(); },
pick: function() { widget.pick(); }
}));
if (options.closeOnUnfocus !== false) {
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 = e.target || e.srcElement;
if (t.hintId != null) {widget.changeActive(t.hintId); widget.pick();}
});
CodeMirror.on(hints, "click", function(e) {
var t = e.target || e.srcElement;
if (t.hintId != null) widget.changeActive(t.hintId);
});
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 !== false) {
cm.off("blur", this.onBlur);
cm.off("focus", this.onFocus);
}
cm.off("scroll", this.onScroll);
},
pick: function() {
this.completion.pick(this.data, this.selectedHint);
},
changeActive: function(i) {
i = Math.max(0, Math.min(i, this.data.list.length - 1));
if (this.selectedHint == i) return;
var node = this.hints.childNodes[this.selectedHint];
node.className = node.className.replace(" CodeMirror-hint-active", "");
node = this.hints.childNodes[this.selectedHint = i];
node.className += " CodeMirror-hint-active";
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;
}
};
})();