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// function completer.
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//
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// completer should be a class that take an cell instance
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var IPython = (function (IPython) {
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// that will prevent us from misspelling
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"use strict";
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// easyier key mapping
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var key = IPython.utils.keycodes;
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// what is the common start of all completions
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function shared_start(B) {
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if (B.length == 1) {
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return B[0];
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}
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var A = new Array();
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for (var i = 0; i < B.length; i++) {
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A.push(B[i].str);
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}
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if (A.length > 1) {
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var tem1, tem2, s;
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A = A.slice(0).sort();
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tem1 = A[0];
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s = tem1.length;
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tem2 = A.pop();
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while (s && tem2.indexOf(tem1) == -1) {
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tem1 = tem1.substring(0, --s);
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}
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if (tem1 == "" || tem2.indexOf(tem1) != 0) {
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return null;
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}
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return {
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str: tem1,
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type: "computed",
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from: B[0].from,
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to: B[0].to
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};
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}
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return null;
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}
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var Completer = function (cell) {
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this.editor = cell.code_mirror;
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var that = this;
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$([IPython.events]).on('status_busy.Kernel', function () {
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that.skip_kernel_completion = true;
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});
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$([IPython.events]).on('status_idle.Kernel', function () {
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that.skip_kernel_completion = false;
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});
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};
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Completer.prototype.startCompletion = function () {
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// call for a 'first' completion, that will set the editor and do some
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// special behaviour like autopicking if only one completion availlable
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//
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if (this.editor.somethingSelected()) return;
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this.done = false;
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// use to get focus back on opera
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this.carry_on_completion(true);
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};
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Completer.prototype.carry_on_completion = function (ff) {
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// Pass true as parameter if you want the commpleter to autopick when
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// only one completion. This function is automatically reinvoked at
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// each keystroke with ff = false
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var cur = this.editor.getCursor();
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var line = this.editor.getLine(cur.line);
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var pre_cursor = this.editor.getRange({
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line: cur.line,
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ch: cur.ch - 1
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}, cur);
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// we need to check that we are still on a word boundary
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// because while typing the completer is still reinvoking itself
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if (!/[0-9a-z._]/i.test(pre_cursor)) {
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this.close();
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return;
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}
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this.autopick = false;
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if (ff != 'undefined' && ff == true) {
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this.autopick = true;
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}
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// We want a single cursor position.
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if (this.editor.somethingSelected()) return;
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// one kernel completion came back, finish_completing will be called with the results
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// we fork here and directly call finish completing if kernel is busy
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if (this.skip_kernel_completion == true) {
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this.finish_completing({
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'matches': [],
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matched_text: ""
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})
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} else {
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var callbacks = {
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'complete_reply': $.proxy(this.finish_completing, this)
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};
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IPython.notebook.kernel.complete(line, cur.ch, callbacks);
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}
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};
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Completer.prototype.finish_completing = function (content) {
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// let's build a function that wrap all that stuff into what is needed
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// for the new completer:
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var matched_text = content.matched_text;
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var matches = content.matches;
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var cur = this.editor.getCursor();
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var results = CodeMirror.contextHint(this.editor);
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// append the introspection result, in order, at at the beginning of
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// the table and compute the replacement range from current cursor
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// positon and matched_text length.
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for (var i = matches.length - 1; i >= 0; --i) {
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results.unshift({
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str: matches[i],
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type: "introspection",
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from: {
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line: cur.line,
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ch: cur.ch - matched_text.length
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},
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to: {
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line: cur.line,
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ch: cur.ch
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}
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});
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}
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// one the 2 sources results have been merge, deal with it
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this.raw_result = results;
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// if empty result return
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if (!this.raw_result || !this.raw_result.length) return;
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// When there is only one completion, use it directly.
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if (this.autopick == true && this.raw_result.length == 1) {
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this.insert(this.raw_result[0]);
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return;
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}
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if (this.raw_result.length == 1) {
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// test if first and only completion totally matches
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// what is typed, in this case dismiss
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var str = this.raw_result[0].str;
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var pre_cursor = this.editor.getRange({
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line: cur.line,
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ch: cur.ch - str.length
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}, cur);
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if (pre_cursor == str) {
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this.close();
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return;
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}
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}
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this.complete = $('<div/>').addClass('completions');
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this.complete.attr('id', 'complete');
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this.sel = $('<select/>').attr('multiple', 'true').attr('size', Math.min(10, this.raw_result.length));
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var pos = this.editor.cursorCoords();
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// TODO: I propose to remove enough horizontal pixel
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// to align the text later
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this.complete.css('left', pos.x + 'px');
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this.complete.css('top', pos.yBot + 'px');
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this.complete.append(this.sel);
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$('body').append(this.complete);
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//build the container
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var that = this;
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this.sel.dblclick(function () {
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that.pick();
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});
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this.sel.blur(this.close);
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this.sel.keydown(function (event) {
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that.keydown(event);
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});
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this.build_gui_list(this.raw_result);
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this.sel.focus();
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// Opera sometimes ignores focusing a freshly created node
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if (window.opera) setTimeout(function () {
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if (!this.done) this.sel.focus();
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}, 100);
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return true;
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}
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Completer.prototype.insert = function (completion) {
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this.editor.replaceRange(completion.str, completion.from, completion.to);
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}
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Completer.prototype.build_gui_list = function (completions) {
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// Need to clear the all list
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for (var i = 0; i < completions.length; ++i) {
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var opt = $('<option/>').text(completions[i].str).addClass(completions[i].type);
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this.sel.append(opt);
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}
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this.sel.children().first().attr('selected', 'true');
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}
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Completer.prototype.close = function () {
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if (this.done) return;
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this.done = true;
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$('.completions').remove();
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}
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Completer.prototype.pick = function () {
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this.insert(this.raw_result[this.sel[0].selectedIndex]);
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this.close();
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var that = this;
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setTimeout(function () {
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that.editor.focus();
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}, 50);
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}
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Completer.prototype.keydown = function (event) {
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var code = event.keyCode;
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var that = this;
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// Enter
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if (code == key.ENTER) {
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CodeMirror.e_stop(event);
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this.pick();
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}
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// Escape or backspace
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else if (code == key.ESC) {
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CodeMirror.e_stop(event);
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this.close();
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this.editor.focus();
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} else if (code == key.SPACE || code == key.BACKSPACE) {
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this.close();
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this.editor.focus();
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} else if (code == key.TAB) {
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//all the fastforwarding operation,
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//Check that shared start is not null which can append with prefixed completion
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// like %pylab , pylab have no shred start, and ff will result in py<tab><tab>
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// to erase py
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var sh = shared_start(this.raw_result);
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if (sh) {
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this.insert(sh);
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}
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this.close();
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CodeMirror.e_stop(event);
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this.editor.focus();
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//reinvoke self
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setTimeout(function () {
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that.carry_on_completion();
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}, 50);
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} else if (code == key.UPARROW || code == key.DOWNARROW) {
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// need to do that to be able to move the arrow
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// when on the first or last line ofo a code cell
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event.stopPropagation();
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} else if (code != key.UPARROW && code != key.DOWNARROW) {
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this.close();
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this.editor.focus();
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//we give focus to the editor immediately and call sell in 50 ms
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setTimeout(function () {
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that.carry_on_completion();
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}, 50);
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}
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}
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IPython.Completer = Completer;
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return IPython;
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}(IPython));
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