| CodeMirror.showHint = function(cm, getHints, options) { |
| if (!options) options = {}; |
| var startCh = cm.getCursor().ch, continued = false; |
| var closeOn = options.closeCharacters || /[\s()\[\]{};:]/; |
| |
| function startHinting() { |
| // We want a single cursor position. |
| if (cm.somethingSelected()) return; |
| |
| if (options.async) |
| getHints(cm, showHints, options); |
| else |
| return showHints(getHints(cm, options)); |
| } |
| |
| function getText(completion) { |
| if (typeof completion == "string") return completion; |
| else return completion.text; |
| } |
| |
| function pickCompletion(cm, data, completion) { |
| if (completion.hint) completion.hint(cm, data, completion); |
| else cm.replaceRange(getText(completion), data.from, data.to); |
| } |
| |
| function showHints(data) { |
| if (!data || !data.list.length) return; |
| var completions = data.list; |
| // When there is only one completion, use it directly. |
| if (!continued && options.completeSingle !== false && completions.length == 1) { |
| pickCompletion(cm, data, completions[0]); |
| CodeMirror.signal(data, "close"); |
| return true; |
| } |
| |
| // Build the select widget |
| var hints = document.createElement("ul"), selectedHint = 0; |
| hints.className = "CodeMirror-hints"; |
| for (var i = 0; i < completions.length; ++i) { |
| var elt = hints.appendChild(document.createElement("li")), completion = completions[i]; |
| var className = "CodeMirror-hint" + (i ? "" : " CodeMirror-hint-active"); |
| if (completion.className != null) className = completion.className + " " + className; |
| elt.className = className; |
| if (completion.render) completion.render(elt, data, completion); |
| else elt.appendChild(document.createTextNode(completion.displayText || getText(completion))); |
| 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"; |
| document.body.appendChild(hints); |
| CodeMirror.signal(data, "shown"); |
| |
| // 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"; |
| } |
| |
| function changeActive(i) { |
| i = Math.max(0, Math.min(i, completions.length - 1)); |
| if (selectedHint == i) return; |
| var node = hints.childNodes[selectedHint]; |
| node.className = node.className.replace(" CodeMirror-hint-active", ""); |
| node = hints.childNodes[selectedHint = i]; |
| node.className += " CodeMirror-hint-active"; |
| if (node.offsetTop < hints.scrollTop) |
| hints.scrollTop = node.offsetTop - 3; |
| else if (node.offsetTop + node.offsetHeight > hints.scrollTop + hints.clientHeight) |
| hints.scrollTop = node.offsetTop + node.offsetHeight - hints.clientHeight + 3; |
| CodeMirror.signal(data, "select", completions[selectedHint], node); |
| } |
| |
| function screenAmount() { |
| return Math.floor(hints.clientHeight / hints.firstChild.offsetHeight) || 1; |
| } |
| |
| var ourMap, baseMap = { |
| Up: function() {changeActive(selectedHint - 1);}, |
| Down: function() {changeActive(selectedHint + 1);}, |
| PageUp: function() {changeActive(selectedHint - screenAmount());}, |
| PageDown: function() {changeActive(selectedHint + screenAmount());}, |
| Home: function() {changeActive(0);}, |
| End: function() {changeActive(completions.length - 1);}, |
| Enter: pick, |
| Tab: pick, |
| Esc: close |
| }; |
| if (options.customKeys) { |
| ourMap = {}; |
| for (var key in options.customKeys) if (options.customKeys.hasOwnProperty(key)) { |
| var val = options.customKeys[key]; |
| if (baseMap.hasOwnProperty(val)) val = baseMap[val]; |
| ourMap[key] = val; |
| } |
| } else ourMap = baseMap; |
| |
| cm.addKeyMap(ourMap); |
| cm.on("cursorActivity", cursorActivity); |
| var closingOnBlur; |
| function onBlur(){ closingOnBlur = setTimeout(close, 100); }; |
| function onFocus(){ clearTimeout(closingOnBlur); }; |
| cm.on("blur", onBlur); |
| cm.on("focus", onFocus); |
| var startScroll = cm.getScrollInfo(); |
| function onScroll() { |
| var curScroll = cm.getScrollInfo(), editor = cm.getWrapperElement().getBoundingClientRect(); |
| var newTop = top + startScroll.top - curScroll.top, point = newTop; |
| if (!below) point += hints.offsetHeight; |
| if (point <= editor.top || point >= editor.bottom) return close(); |
| hints.style.top = newTop + "px"; |
| hints.style.left = (left + startScroll.left - curScroll.left) + "px"; |
| } |
| cm.on("scroll", onScroll); |
| CodeMirror.on(hints, "dblclick", function(e) { |
| var t = e.target || e.srcElement; |
| if (t.hintId != null) {selectedHint = t.hintId; pick();} |
| }); |
| CodeMirror.on(hints, "click", function(e) { |
| var t = e.target || e.srcElement; |
| if (t.hintId != null) changeActive(t.hintId); |
| }); |
| CodeMirror.on(hints, "mousedown", function() { |
| setTimeout(function(){cm.focus();}, 20); |
| }); |
| |
| var done = false, once; |
| function close(willContinue) { |
| if (done) return; |
| done = true; |
| clearTimeout(once); |
| hints.parentNode.removeChild(hints); |
| cm.removeKeyMap(ourMap); |
| cm.off("cursorActivity", cursorActivity); |
| cm.off("blur", onBlur); |
| cm.off("focus", onFocus); |
| cm.off("scroll", onScroll); |
| if (willContinue !== true) CodeMirror.signal(data, "close"); |
| } |
| function pick() { |
| pickCompletion(cm, data, completions[selectedHint]); |
| close(); |
| } |
| var once, lastPos = cm.getCursor(), lastLen = cm.getLine(lastPos.line).length; |
| function cursorActivity() { |
| clearTimeout(once); |
| |
| var pos = cm.getCursor(), line = cm.getLine(pos.line); |
| if (pos.line != lastPos.line || line.length - pos.ch != lastLen - lastPos.ch || |
| pos.ch < startCh || cm.somethingSelected() || |
| (pos.ch && closeOn.test(line.charAt(pos.ch - 1)))) |
| close(); |
| else |
| once = setTimeout(function(){close(true); continued = true; startHinting();}, 70); |
| } |
| CodeMirror.signal(data, "select", completions[0], hints.firstChild); |
| return true; |
| } |
| |
| return startHinting(); |
| }; |