296 lines
11 KiB
JavaScript
296 lines
11 KiB
JavaScript
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(function() {
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"use strict";
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CodeMirror.showHint = function(cm, getHints, options) {
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// We want a single cursor position.
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if (cm.somethingSelected()) return;
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if (getHints == null) getHints = cm.getHelper(cm.getCursor(), "hint");
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if (getHints == null) return;
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if (cm.state.completionActive) cm.state.completionActive.close();
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var completion = cm.state.completionActive = new Completion(cm, getHints, options || {});
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CodeMirror.signal(cm, "startCompletion", cm);
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if (completion.options.async)
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getHints(cm, function(hints) { completion.showHints(hints); }, completion.options);
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else
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return completion.showHints(getHints(cm, completion.options));
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};
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function Completion(cm, getHints, options) {
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this.cm = cm;
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this.getHints = getHints;
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this.options = options;
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this.widget = this.onClose = null;
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}
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Completion.prototype = {
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close: function() {
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if (!this.active()) return;
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this.cm.state.completionActive = null;
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if (this.widget) this.widget.close();
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if (this.onClose) this.onClose();
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CodeMirror.signal(this.cm, "endCompletion", this.cm);
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},
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active: function() {
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return this.cm.state.completionActive == this;
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},
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pick: function(data, i) {
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var completion = data.list[i];
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if (completion.hint) completion.hint(this.cm, data, completion);
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else this.cm.replaceRange(getText(completion), data.from, data.to);
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this.close();
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},
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showHints: function(data) {
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if (!data || !data.list.length || !this.active()) return this.close();
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if (this.options.completeSingle != false && data.list.length == 1)
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this.pick(data, 0);
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else
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this.showWidget(data);
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},
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showWidget: function(data) {
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this.widget = new Widget(this, data);
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CodeMirror.signal(data, "shown");
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var debounce = null, completion = this, finished;
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var closeOn = this.options.closeCharacters || /[\s()\[\]{};:>,-]/;
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var startPos = this.cm.getCursor(), startLen = this.cm.getLine(startPos.line).length;
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function done() {
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if (finished) return;
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finished = true;
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completion.close();
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completion.cm.off("cursorActivity", activity);
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if (data) CodeMirror.signal(data, "close");
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}
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function update() {
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if (finished) return;
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CodeMirror.signal(data, "update");
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if (completion.options.async)
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completion.getHints(completion.cm, finishUpdate, completion.options);
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else
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finishUpdate(completion.getHints(completion.cm, completion.options));
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}
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function finishUpdate(data_) {
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data = data_;
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if (finished) return;
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if (!data || !data.list.length) return done();
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completion.widget = new Widget(completion, data);
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}
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function activity() {
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clearTimeout(debounce);
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var pos = completion.cm.getCursor(), line = completion.cm.getLine(pos.line);
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if (pos.line != startPos.line || line.length - pos.ch != startLen - startPos.ch ||
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pos.ch < startPos.ch || completion.cm.somethingSelected() ||
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(pos.ch && closeOn.test(line.charAt(pos.ch - 1)))) {
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completion.close();
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} else {
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debounce = setTimeout(update, 170);
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if (completion.widget) completion.widget.close();
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}
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}
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this.cm.on("cursorActivity", activity);
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this.onClose = done;
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}
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};
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function getText(completion) {
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if (typeof completion == "string") return completion;
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else if (typeof completion == "object") return completion[0];
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else return completion.text;
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}
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function getType(completion) {
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if (typeof completion == "object") return completion[1];
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else return "";
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}
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function buildKeyMap(options, handle) {
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var baseMap = {
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Up: function() {handle.moveFocus(-1);},
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Down: function() {handle.moveFocus(1);},
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PageUp: function() {handle.moveFocus(-handle.menuSize());},
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PageDown: function() {handle.moveFocus(handle.menuSize());},
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Home: function() {handle.setFocus(0);},
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End: function() {handle.setFocus(handle.length);},
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Enter: handle.pick,
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Tab: handle.pick,
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Esc: handle.close
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};
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var ourMap = options.customKeys ? {} : baseMap;
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function addBinding(key, val) {
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var bound;
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if (typeof val != "string")
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bound = function(cm) { return val(cm, handle); };
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// This mechanism is deprecated
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else if (baseMap.hasOwnProperty(val))
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bound = baseMap[val];
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else
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bound = val;
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ourMap[key] = bound;
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}
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if (options.customKeys)
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for (var key in options.customKeys) if (options.customKeys.hasOwnProperty(key))
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addBinding(key, options.customKeys[key]);
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if (options.extraKeys)
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for (var key in options.extraKeys) if (options.extraKeys.hasOwnProperty(key))
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addBinding(key, options.extraKeys[key]);
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return ourMap;
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}
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function Widget(completion, data) {
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this.completion = completion;
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this.data = data;
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var widget = this, cm = completion.cm, options = completion.options;
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var hints = this.hints = document.createElement("ul");
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hints.className = "CodeMirror-hints";
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this.selectedHint = 0;
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var completions = data.list;
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for (var i = 0; i < completions.length; ++i) {
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var elt = hints.appendChild(document.createElement("li")), cur = getText(completions[i]);
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var className = "CodeMirror-hint" + (i ? "" : " CodeMirror-hint-active");
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if (cur.className != null) className = cur.className + " " + className;
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elt.className = className;
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if (cur.render) cur.render(elt, data, cur);
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else {
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var value = document.createElement("span");
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value.className = (typeof completions[i] == "string") ? "text" : "value";
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value.innerHTML = cur.displayText || cur;
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value.title = cur.displayText || cur;
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value.hintId = i;
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if (getType(completions[i])) {
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var type = document.createElement("span");
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type.className = "type";
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type.hintId = i;
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type.innerHTML = getType(completions[i]);
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elt.appendChild(type);
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}
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elt.appendChild(value);
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}
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elt.hintId = i;
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}
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var pos = cm.cursorCoords(options.alignWithWord !== false ? data.from : null);
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var left = pos.left, top = pos.bottom, below = true;
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hints.style.left = left + "px";
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hints.style.top = top + "px";
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// If we're at the edge of the screen, then we want the menu to appear on the left of the cursor.
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var winW = window.innerWidth || Math.max(document.body.offsetWidth, document.documentElement.offsetWidth);
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var winH = window.innerHeight || Math.max(document.body.offsetHeight, document.documentElement.offsetHeight);
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(options.container || document.body).appendChild(hints);
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var box = hints.getBoundingClientRect();
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var overlapX = box.right - winW, overlapY = box.bottom - winH;
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if (overlapX > 0) {
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if (box.right - box.left > winW) {
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hints.style.width = (winW - 5) + "px";
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overlapX -= (box.right - box.left) - winW;
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}
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hints.style.left = (left = pos.left - overlapX) + "px";
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}
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if (overlapY > 0) {
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var height = box.bottom - box.top;
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if (box.top - (pos.bottom - pos.top) - height > 0) {
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overlapY = height + (pos.bottom - pos.top);
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below = false;
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} else if (height > winH) {
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hints.style.height = (winH - 5) + "px";
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overlapY -= height - winH;
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}
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hints.style.top = (top = pos.bottom - overlapY) + "px";
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}
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cm.addKeyMap(this.keyMap = buildKeyMap(options, {
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moveFocus: function(n) { widget.changeActive(widget.selectedHint + n); },
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setFocus: function(n) { widget.changeActive(n); },
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menuSize: function() { return widget.screenAmount(); },
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length: completions.length,
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close: function() { completion.close(); },
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pick: function() { widget.pick(); }
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}));
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if (options.closeOnUnfocus !== false) {
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var closingOnBlur;
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cm.on("blur", this.onBlur = function() { closingOnBlur = setTimeout(function() { completion.close(); }, 100); });
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cm.on("focus", this.onFocus = function() { clearTimeout(closingOnBlur); });
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}
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var startScroll = cm.getScrollInfo();
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cm.on("scroll", this.onScroll = function() {
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var curScroll = cm.getScrollInfo(), editor = cm.getWrapperElement().getBoundingClientRect();
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var newTop = top + startScroll.top - curScroll.top;
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var point = newTop - (window.pageYOffset || (document.documentElement || document.body).scrollTop);
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if (!below) point += hints.offsetHeight;
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if (point <= editor.top || point >= editor.bottom) return completion.close();
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hints.style.top = newTop + "px";
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hints.style.left = (left + startScroll.left - curScroll.left) + "px";
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});
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CodeMirror.on(hints, "click", function(e) {
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var t = e.target || e.srcElement;
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if (t.hintId != null) {widget.changeActive(t.hintId); widget.pick();}
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});
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CodeMirror.on(hints, "mouseover", function(e) {
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var t = e.target || e.srcElement;
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if (t.hintId != null) widget.changeActive(t.hintId);
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});
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CodeMirror.on(hints, "mousedown", function() {
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setTimeout(function(){cm.focus();}, 20);
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});
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CodeMirror.signal(data, "select", completions[0], hints.firstChild);
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return true;
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}
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Widget.prototype = {
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close: function() {
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if (this.completion.widget != this) return;
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this.completion.widget = null;
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this.hints.parentNode.removeChild(this.hints);
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this.completion.cm.removeKeyMap(this.keyMap);
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var cm = this.completion.cm;
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if (this.completion.options.closeOnUnfocus !== false) {
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cm.off("blur", this.onBlur);
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cm.off("focus", this.onFocus);
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}
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cm.off("scroll", this.onScroll);
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},
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pick: function() {
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this.completion.pick(this.data, this.selectedHint);
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},
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changeActive: function(i) {
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i = Math.max(0, Math.min(i, this.data.list.length - 1));
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if (this.selectedHint == i) return;
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var node = this.hints.childNodes[this.selectedHint];
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node.className = node.className.replace(" CodeMirror-hint-active", "");
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node = this.hints.childNodes[this.selectedHint = i];
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node.className += " CodeMirror-hint-active";
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if (node.offsetTop < this.hints.scrollTop)
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this.hints.scrollTop = node.offsetTop - 3;
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else if (node.offsetTop + node.offsetHeight > this.hints.scrollTop + this.hints.clientHeight)
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this.hints.scrollTop = node.offsetTop + node.offsetHeight - this.hints.clientHeight + 3;
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CodeMirror.signal(this.data, "select", this.data.list[this.selectedHint], node);
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},
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screenAmount: function() {
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return Math.floor(this.hints.clientHeight / this.hints.firstChild.offsetHeight) || 1;
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}
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};
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})();
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