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show-hint.js
441 lines
| 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 | "use strict"; |
| 13 | |
| 14 | var HINT_ELEMENT_CLASS = "CodeMirror-hint"; |
| 15 | var ACTIVE_HINT_ELEMENT_CLASS = "CodeMirror-hint-active"; |
| 16 | |
| 17 | // This is the old interface, kept around for now to stay |
| 18 | // backwards-compatible. |
| 19 | CodeMirror.showHint = function(cm, getHints, options) { |
| 20 | if (!getHints) return cm.showHint(options); |
| 21 | if (options && options.async) getHints.async = true; |
| 22 | var newOpts = {hint: getHints}; |
| 23 | if (options) for (var prop in options) newOpts[prop] = options[prop]; |
| 24 | return cm.showHint(newOpts); |
| 25 | }; |
| 26 | |
| 27 | CodeMirror.defineExtension("showHint", function(options) { |
| 28 | options = parseOptions(this, this.getCursor("start"), options); |
| 29 | var selections = this.listSelections() |
| 30 | if (selections.length > 1) return; |
| 31 | // By default, don't allow completion when something is selected. |
| 32 | // A hint function can have a `supportsSelection` property to |
| 33 | // indicate that it can handle selections. |
| 34 | if (this.somethingSelected()) { |
| 35 | if (!options.hint.supportsSelection) return; |
| 36 | // Don't try with cross-line selections |
| 37 | for (var i = 0; i < selections.length; i++) |
| 38 | if (selections[i].head.line != selections[i].anchor.line) return; |
| 39 | } |
| 40 | |
| 41 | if (this.state.completionActive) this.state.completionActive.close(); |
| 42 | var completion = this.state.completionActive = new Completion(this, options); |
| 43 | if (!completion.options.hint) return; |
| 44 | |
| 45 | CodeMirror.signal(this, "startCompletion", this); |
| 46 | completion.update(true); |
| 47 | }); |
| 48 | |
| 49 | function Completion(cm, options) { |
| 50 | this.cm = cm; |
| 51 | this.options = options; |
| 52 | this.widget = null; |
| 53 | this.debounce = 0; |
| 54 | this.tick = 0; |
| 55 | this.startPos = this.cm.getCursor("start"); |
| 56 | this.startLen = this.cm.getLine(this.startPos.line).length - this.cm.getSelection().length; |
| 57 | |
| 58 | var self = this; |
| 59 | cm.on("cursorActivity", this.activityFunc = function() { self.cursorActivity(); }); |
| 60 | } |
| 61 | |
| 62 | var requestAnimationFrame = window.requestAnimationFrame || function(fn) { |
| 63 | return setTimeout(fn, 1000/60); |
| 64 | }; |
| 65 | var cancelAnimationFrame = window.cancelAnimationFrame || clearTimeout; |
| 66 | |
| 67 | Completion.prototype = { |
| 68 | close: function() { |
| 69 | if (!this.active()) return; |
| 70 | this.cm.state.completionActive = null; |
| 71 | this.tick = null; |
| 72 | this.cm.off("cursorActivity", this.activityFunc); |
| 73 | |
| 74 | if (this.widget && this.data) CodeMirror.signal(this.data, "close"); |
| 75 | if (this.widget) this.widget.close(); |
| 76 | CodeMirror.signal(this.cm, "endCompletion", this.cm); |
| 77 | }, |
| 78 | |
| 79 | active: function() { |
| 80 | return this.cm.state.completionActive == this; |
| 81 | }, |
| 82 | |
| 83 | pick: function(data, i) { |
| 84 | var completion = data.list[i]; |
| 85 | if (completion.hint) completion.hint(this.cm, data, completion); |
| 86 | else this.cm.replaceRange(getText(completion), completion.from || data.from, |
| 87 | completion.to || data.to, "complete"); |
| 88 | CodeMirror.signal(data, "pick", completion); |
| 89 | this.close(); |
| 90 | }, |
| 91 | |
| 92 | cursorActivity: function() { |
| 93 | if (this.debounce) { |
| 94 | cancelAnimationFrame(this.debounce); |
| 95 | this.debounce = 0; |
| 96 | } |
| 97 | |
| 98 | var pos = this.cm.getCursor(), line = this.cm.getLine(pos.line); |
| 99 | if (pos.line != this.startPos.line || line.length - pos.ch != this.startLen - this.startPos.ch || |
| 100 | pos.ch < this.startPos.ch || this.cm.somethingSelected() || |
| 101 | (pos.ch && this.options.closeCharacters.test(line.charAt(pos.ch - 1)))) { |
| 102 | this.close(); |
| 103 | } else { |
| 104 | var self = this; |
| 105 | this.debounce = requestAnimationFrame(function() {self.update();}); |
| 106 | if (this.widget) this.widget.disable(); |
| 107 | } |
| 108 | }, |
| 109 | |
| 110 | update: function(first) { |
| 111 | if (this.tick == null) return; |
| 112 | if (!this.options.hint.async) { |
| 113 | this.finishUpdate(this.options.hint(this.cm, this.options), first); |
| 114 | } else { |
| 115 | var myTick = ++this.tick, self = this; |
| 116 | this.options.hint(this.cm, function(data) { |
| 117 | if (self.tick == myTick) self.finishUpdate(data, first); |
| 118 | }, this.options); |
| 119 | } |
| 120 | }, |
| 121 | |
| 122 | finishUpdate: function(data, first) { |
| 123 | if (this.data) CodeMirror.signal(this.data, "update"); |
| 124 | if (data && this.data && CodeMirror.cmpPos(data.from, this.data.from)) data = null; |
| 125 | this.data = data; |
| 126 | |
| 127 | var picked = (this.widget && this.widget.picked) || (first && this.options.completeSingle); |
| 128 | if (this.widget) this.widget.close(); |
| 129 | if (data && data.list.length) { |
| 130 | if (picked && data.list.length == 1) { |
| 131 | this.pick(data, 0); |
| 132 | } else { |
| 133 | this.widget = new Widget(this, data); |
| 134 | CodeMirror.signal(data, "shown"); |
| 135 | } |
| 136 | } |
| 137 | } |
| 138 | }; |
| 139 | |
| 140 | function parseOptions(cm, pos, options) { |
| 141 | var editor = cm.options.hintOptions; |
| 142 | var out = {}; |
| 143 | for (var prop in defaultOptions) out[prop] = defaultOptions[prop]; |
| 144 | if (editor) for (var prop in editor) |
| 145 | if (editor[prop] !== undefined) out[prop] = editor[prop]; |
| 146 | if (options) for (var prop in options) |
| 147 | if (options[prop] !== undefined) out[prop] = options[prop]; |
| 148 | if (out.hint.resolve) out.hint = out.hint.resolve(cm, pos) |
| 149 | return out; |
| 150 | } |
| 151 | |
| 152 | function getText(completion) { |
| 153 | if (typeof completion == "string") return completion; |
| 154 | else return completion.text; |
| 155 | } |
| 156 | |
| 157 | function buildKeyMap(completion, handle) { |
| 158 | var baseMap = { |
| 159 | Up: function() {handle.moveFocus(-1);}, |
| 160 | Down: function() {handle.moveFocus(1);}, |
| 161 | PageUp: function() {handle.moveFocus(-handle.menuSize() + 1, true);}, |
| 162 | PageDown: function() {handle.moveFocus(handle.menuSize() - 1, true);}, |
| 163 | Home: function() {handle.setFocus(0);}, |
| 164 | End: function() {handle.setFocus(handle.length - 1);}, |
| 165 | Enter: handle.pick, |
| 166 | Tab: handle.pick, |
| 167 | Esc: handle.close |
| 168 | }; |
| 169 | var custom = completion.options.customKeys; |
| 170 | var ourMap = custom ? {} : baseMap; |
| 171 | function addBinding(key, val) { |
| 172 | var bound; |
| 173 | if (typeof val != "string") |
| 174 | bound = function(cm) { return val(cm, handle); }; |
| 175 | // This mechanism is deprecated |
| 176 | else if (baseMap.hasOwnProperty(val)) |
| 177 | bound = baseMap[val]; |
| 178 | else |
| 179 | bound = val; |
| 180 | ourMap[key] = bound; |
| 181 | } |
| 182 | if (custom) |
| 183 | for (var key in custom) if (custom.hasOwnProperty(key)) |
| 184 | addBinding(key, custom[key]); |
| 185 | var extra = completion.options.extraKeys; |
| 186 | if (extra) |
| 187 | for (var key in extra) if (extra.hasOwnProperty(key)) |
| 188 | addBinding(key, extra[key]); |
| 189 | return ourMap; |
| 190 | } |
| 191 | |
| 192 | function getHintElement(hintsElement, el) { |
| 193 | while (el && el != hintsElement) { |
| 194 | if (el.nodeName.toUpperCase() === "LI" && el.parentNode == hintsElement) return el; |
| 195 | el = el.parentNode; |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | function Widget(completion, data) { |
| 200 | this.completion = completion; |
| 201 | this.data = data; |
| 202 | this.picked = false; |
| 203 | var widget = this, cm = completion.cm; |
| 204 | |
| 205 | var hints = this.hints = document.createElement("ul"); |
| 206 | hints.className = "CodeMirror-hints"; |
| 207 | this.selectedHint = data.selectedHint || 0; |
| 208 | |
| 209 | var completions = data.list; |
| 210 | for (var i = 0; i < completions.length; ++i) { |
| 211 | var elt = hints.appendChild(document.createElement("li")), cur = completions[i]; |
| 212 | var className = HINT_ELEMENT_CLASS + (i != this.selectedHint ? "" : " " + ACTIVE_HINT_ELEMENT_CLASS); |
| 213 | if (cur.className != null) className = cur.className + " " + className; |
| 214 | elt.className = className; |
| 215 | if (cur.render) cur.render(elt, data, cur); |
| 216 | else elt.appendChild(document.createTextNode(cur.displayText || getText(cur))); |
| 217 | elt.hintId = i; |
| 218 | } |
| 219 | |
| 220 | var pos = cm.cursorCoords(completion.options.alignWithWord ? data.from : null); |
| 221 | var left = pos.left, top = pos.bottom, below = true; |
| 222 | hints.style.left = left + "px"; |
| 223 | hints.style.top = top + "px"; |
| 224 | // If we're at the edge of the screen, then we want the menu to appear on the left of the cursor. |
| 225 | var winW = window.innerWidth || Math.max(document.body.offsetWidth, document.documentElement.offsetWidth); |
| 226 | var winH = window.innerHeight || Math.max(document.body.offsetHeight, document.documentElement.offsetHeight); |
| 227 | (completion.options.container || document.body).appendChild(hints); |
| 228 | var box = hints.getBoundingClientRect(), overlapY = box.bottom - winH; |
| 229 | if (overlapY > 0) { |
| 230 | var height = box.bottom - box.top, curTop = pos.top - (pos.bottom - box.top); |
| 231 | if (curTop - height > 0) { // Fits above cursor |
| 232 | hints.style.top = (top = pos.top - height) + "px"; |
| 233 | below = false; |
| 234 | } else if (height > winH) { |
| 235 | hints.style.height = (winH - 5) + "px"; |
| 236 | hints.style.top = (top = pos.bottom - box.top) + "px"; |
| 237 | var cursor = cm.getCursor(); |
| 238 | if (data.from.ch != cursor.ch) { |
| 239 | pos = cm.cursorCoords(cursor); |
| 240 | hints.style.left = (left = pos.left) + "px"; |
| 241 | box = hints.getBoundingClientRect(); |
| 242 | } |
| 243 | } |
| 244 | } |
| 245 | var overlapX = box.right - winW; |
| 246 | if (overlapX > 0) { |
| 247 | if (box.right - box.left > winW) { |
| 248 | hints.style.width = (winW - 5) + "px"; |
| 249 | overlapX -= (box.right - box.left) - winW; |
| 250 | } |
| 251 | hints.style.left = (left = pos.left - overlapX) + "px"; |
| 252 | } |
| 253 | |
| 254 | cm.addKeyMap(this.keyMap = buildKeyMap(completion, { |
| 255 | moveFocus: function(n, avoidWrap) { widget.changeActive(widget.selectedHint + n, avoidWrap); }, |
| 256 | setFocus: function(n) { widget.changeActive(n); }, |
| 257 | menuSize: function() { return widget.screenAmount(); }, |
| 258 | length: completions.length, |
| 259 | close: function() { completion.close(); }, |
| 260 | pick: function() { widget.pick(); }, |
| 261 | data: data |
| 262 | })); |
| 263 | |
| 264 | if (completion.options.closeOnUnfocus) { |
| 265 | var closingOnBlur; |
| 266 | cm.on("blur", this.onBlur = function() { closingOnBlur = setTimeout(function() { completion.close(); }, 100); }); |
| 267 | cm.on("focus", this.onFocus = function() { clearTimeout(closingOnBlur); }); |
| 268 | } |
| 269 | |
| 270 | var startScroll = cm.getScrollInfo(); |
| 271 | cm.on("scroll", this.onScroll = function() { |
| 272 | var curScroll = cm.getScrollInfo(), editor = cm.getWrapperElement().getBoundingClientRect(); |
| 273 | var newTop = top + startScroll.top - curScroll.top; |
| 274 | var point = newTop - (window.pageYOffset || (document.documentElement || document.body).scrollTop); |
| 275 | if (!below) point += hints.offsetHeight; |
| 276 | if (point <= editor.top || point >= editor.bottom) return completion.close(); |
| 277 | hints.style.top = newTop + "px"; |
| 278 | hints.style.left = (left + startScroll.left - curScroll.left) + "px"; |
| 279 | }); |
| 280 | |
| 281 | CodeMirror.on(hints, "dblclick", function(e) { |
| 282 | var t = getHintElement(hints, e.target || e.srcElement); |
| 283 | if (t && t.hintId != null) {widget.changeActive(t.hintId); widget.pick();} |
| 284 | }); |
| 285 | |
| 286 | CodeMirror.on(hints, "click", function(e) { |
| 287 | var t = getHintElement(hints, e.target || e.srcElement); |
| 288 | if (t && t.hintId != null) { |
| 289 | widget.changeActive(t.hintId); |
| 290 | if (completion.options.completeOnSingleClick) widget.pick(); |
| 291 | } |
| 292 | }); |
| 293 | |
| 294 | CodeMirror.on(hints, "mousedown", function() { |
| 295 | setTimeout(function(){cm.focus();}, 20); |
| 296 | }); |
| 297 | |
| 298 | CodeMirror.signal(data, "select", completions[0], hints.firstChild); |
| 299 | return true; |
| 300 | } |
| 301 | |
| 302 | Widget.prototype = { |
| 303 | close: function() { |
| 304 | if (this.completion.widget != this) return; |
| 305 | this.completion.widget = null; |
| 306 | this.hints.parentNode.removeChild(this.hints); |
| 307 | this.completion.cm.removeKeyMap(this.keyMap); |
| 308 | |
| 309 | var cm = this.completion.cm; |
| 310 | if (this.completion.options.closeOnUnfocus) { |
| 311 | cm.off("blur", this.onBlur); |
| 312 | cm.off("focus", this.onFocus); |
| 313 | } |
| 314 | cm.off("scroll", this.onScroll); |
| 315 | }, |
| 316 | |
| 317 | disable: function() { |
| 318 | this.completion.cm.removeKeyMap(this.keyMap); |
| 319 | var widget = this; |
| 320 | this.keyMap = {Enter: function() { widget.picked = true; }}; |
| 321 | this.completion.cm.addKeyMap(this.keyMap); |
| 322 | }, |
| 323 | |
| 324 | pick: function() { |
| 325 | this.completion.pick(this.data, this.selectedHint); |
| 326 | }, |
| 327 | |
| 328 | changeActive: function(i, avoidWrap) { |
| 329 | if (i >= this.data.list.length) |
| 330 | i = avoidWrap ? this.data.list.length - 1 : 0; |
| 331 | else if (i < 0) |
| 332 | i = avoidWrap ? 0 : this.data.list.length - 1; |
| 333 | if (this.selectedHint == i) return; |
| 334 | var node = this.hints.childNodes[this.selectedHint]; |
| 335 | node.className = node.className.replace(" " + ACTIVE_HINT_ELEMENT_CLASS, ""); |
| 336 | node = this.hints.childNodes[this.selectedHint = i]; |
| 337 | node.className += " " + ACTIVE_HINT_ELEMENT_CLASS; |
| 338 | if (node.offsetTop < this.hints.scrollTop) |
| 339 | this.hints.scrollTop = node.offsetTop - 3; |
| 340 | else if (node.offsetTop + node.offsetHeight > this.hints.scrollTop + this.hints.clientHeight) |
| 341 | this.hints.scrollTop = node.offsetTop + node.offsetHeight - this.hints.clientHeight + 3; |
| 342 | CodeMirror.signal(this.data, "select", this.data.list[this.selectedHint], node); |
| 343 | }, |
| 344 | |
| 345 | screenAmount: function() { |
| 346 | return Math.floor(this.hints.clientHeight / this.hints.firstChild.offsetHeight) || 1; |
| 347 | } |
| 348 | }; |
| 349 | |
| 350 | function applicableHelpers(cm, helpers) { |
| 351 | if (!cm.somethingSelected()) return helpers |
| 352 | var result = [] |
| 353 | for (var i = 0; i < helpers.length; i++) |
| 354 | if (helpers[i].supportsSelection) result.push(helpers[i]) |
| 355 | return result |
| 356 | } |
| 357 | |
| 358 | function resolveAutoHints(cm, pos) { |
| 359 | var helpers = cm.getHelpers(pos, "hint"), words |
| 360 | if (helpers.length) { |
| 361 | var async = false, resolved |
| 362 | for (var i = 0; i < helpers.length; i++) if (helpers[i].async) async = true |
| 363 | if (async) { |
| 364 | resolved = function(cm, callback, options) { |
| 365 | var app = applicableHelpers(cm, helpers) |
| 366 | function run(i, result) { |
| 367 | if (i == app.length) return callback(null) |
| 368 | var helper = app[i] |
| 369 | if (helper.async) { |
| 370 | helper(cm, function(result) { |
| 371 | if (result) callback(result) |
| 372 | else run(i + 1) |
| 373 | }, options) |
| 374 | } else { |
| 375 | var result = helper(cm, options) |
| 376 | if (result) callback(result) |
| 377 | else run(i + 1) |
| 378 | } |
| 379 | } |
| 380 | run(0) |
| 381 | } |
| 382 | resolved.async = true |
| 383 | } else { |
| 384 | resolved = function(cm, options) { |
| 385 | var app = applicableHelpers(cm, helpers) |
| 386 | for (var i = 0; i < app.length; i++) { |
| 387 | var cur = app[i](cm, options) |
| 388 | if (cur && cur.list.length) return cur |
| 389 | } |
| 390 | } |
| 391 | } |
| 392 | resolved.supportsSelection = true |
| 393 | return resolved |
| 394 | } else if (words = cm.getHelper(cm.getCursor(), "hintWords")) { |
| 395 | return function(cm) { return CodeMirror.hint.fromList(cm, {words: words}) } |
| 396 | } else if (CodeMirror.hint.anyword) { |
| 397 | return function(cm, options) { return CodeMirror.hint.anyword(cm, options) } |
| 398 | } else { |
| 399 | return function() {} |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | CodeMirror.registerHelper("hint", "auto", { |
| 404 | resolve: resolveAutoHints |
| 405 | }); |
| 406 | |
| 407 | CodeMirror.registerHelper("hint", "fromList", function(cm, options) { |
| 408 | var cur = cm.getCursor(), token = cm.getTokenAt(cur); |
| 409 | var to = CodeMirror.Pos(cur.line, token.end); |
| 410 | if (token.string && /\w/.test(token.string[token.string.length - 1])) { |
| 411 | var term = token.string, from = CodeMirror.Pos(cur.line, token.start); |
| 412 | } else { |
| 413 | var term = "", from = to; |
| 414 | } |
| 415 | var found = []; |
| 416 | for (var i = 0; i < options.words.length; i++) { |
| 417 | var word = options.words[i]; |
| 418 | if (word.slice(0, term.length) == term) |
| 419 | found.push(word); |
| 420 | } |
| 421 | |
| 422 | if (found.length) return {list: found, from: from, to: to}; |
| 423 | }); |
| 424 | |
| 425 | CodeMirror.commands.autocomplete = CodeMirror.showHint; |
| 426 | |
| 427 | var defaultOptions = { |
| 428 | hint: CodeMirror.hint.auto, |
| 429 | completeSingle: true, |
| 430 | alignWithWord: true, |
| 431 | closeCharacters: /[\s()\[\]{};:>,]/, |
| 432 | closeOnUnfocus: true, |
| 433 | completeOnSingleClick: true, |
| 434 | container: null, |
| 435 | customKeys: null, |
| 436 | extraKeys: null |
| 437 | }; |
| 438 | |
| 439 | CodeMirror.defineOption("hintOptions", null); |
| 440 | }); |
| 441 |