Set tabindex -1, use codemirror's events

IPython/html/static/notebook/js/completer.js

@@ -1,402 +1,373 b''
 // function completer.
 //
 // completer should be a class that takes an cell instance
 var IPython = (function (IPython) {
     // that will prevent us from misspelling
     "use strict";
 
     // easier key mapping
     var keycodes = IPython.keyboard.keycodes;
 
     function prepend_n_prc(str, n) {
         for( var i =0 ; i< n ; i++){
             str = '%'+str ;
         }
         return str;
     }
 
     function _existing_completion(item, completion_array){
         for( var c in completion_array ) {
             if(completion_array[c].trim().substr(-item.length) == item)
             { return true; }
         }
        return false;
     }
 
     // what is the common start of all completions
     function shared_start(B, drop_prct) {
         if (B.length == 1) {
             return B[0];
         }
         var A = [];
         var common;
         var min_lead_prct = 10;
         for (var i = 0; i < B.length; i++) {
             var str = B[i].str;
             var localmin = 0;
             if(drop_prct === true){
                 while ( str.substr(0, 1) == '%') {
                     localmin = localmin+1;
                     str = str.substring(1);
                 }
             }
             min_lead_prct = Math.min(min_lead_prct, localmin);
             A.push(str);
         }
 
         if (A.length > 1) {
             var tem1, tem2, s;
             A = A.slice(0).sort();
             tem1 = A[0];
             s = tem1.length;
             tem2 = A.pop();
             while (s && tem2.indexOf(tem1) == -1) {
                 tem1 = tem1.substring(0, --s);
             }
             if (tem1 === "" || tem2.indexOf(tem1) !== 0) {
                 return {
                     str:prepend_n_prc('', min_lead_prct),
                     type: "computed",
                     from: B[0].from,
                     to: B[0].to
                     };
             }
             return {
                 str: prepend_n_prc(tem1, min_lead_prct),
                 type: "computed",
                 from: B[0].from,
                 to: B[0].to
             };
         }
         return null;
     }
 
 
     var Completer = function (cell) {
         this.cell = cell;
         this.editor = cell.code_mirror;
         var that = this;
         $([IPython.events]).on('status_busy.Kernel', function () {
             that.skip_kernel_completion = true;
         });
         $([IPython.events]).on('status_idle.Kernel', function () {
             that.skip_kernel_completion = false;
         });
     };
 
     Completer.prototype.startCompletion = function () {
         // call for a 'first' completion, that will set the editor and do some
         // special behaviour like autopicking if only one completion availlable
         //
         if (this.editor.somethingSelected()) return;
         this.done = false;
         // use to get focus back on opera
         this.carry_on_completion(true);
     };
 
 
     // easy access for julia to monkeypatch
     //
     Completer.reinvoke_re = /[%0-9a-z._/\\:~-]/i;
 
     Completer.prototype.reinvoke= function(pre_cursor, block, cursor){
         return Completer.reinvoke_re.test(pre_cursor);
     };
 
     /**
      *
      * pass true as parameter if this is the first invocation of the completer
      * this will prevent the completer to dissmiss itself if it is not on a
      * word boundary like pressing tab after a space, and make it autopick the
      * only choice if there is only one which prevent from popping the UI.  as
      * well as fast-forwarding the typing if all completion have a common
      * shared start
      **/
     Completer.prototype.carry_on_completion = function (first_invocation) {
         // Pass true as parameter if you want the completer to autopick when
         // only one completion. This function is automatically reinvoked at
         // each keystroke with first_invocation = false
         var cur = this.editor.getCursor();
         var line = this.editor.getLine(cur.line);
         var pre_cursor = this.editor.getRange({
             line: cur.line,
             ch: cur.ch - 1
         }, cur);
 
         // we need to check that we are still on a word boundary
         // because while typing the completer is still reinvoking itself
         // so dismiss if we are on a "bad" caracter
         if (!this.reinvoke(pre_cursor) && !first_invocation) {
             this.close();
             return;
         }
 
         this.autopick = false;
         if (first_invocation) {
             this.autopick = true;
         }
 
         // We want a single cursor position.
         if (this.editor.somethingSelected()) {
             return;
         }
 
         // one kernel completion came back, finish_completing will be called with the results
         // we fork here and directly call finish completing if kernel is busy
         if (this.skip_kernel_completion) {
             this.finish_completing({
                 'matches': [],
                 matched_text: ""
             });
         } else {
             this.cell.kernel.complete(line, cur.ch, $.proxy(this.finish_completing, this));
         }
     };
 
     Completer.prototype.finish_completing = function (msg) {
         // let's build a function that wrap all that stuff into what is needed
         // for the new completer:
         var content = msg.content;
         var matched_text = content.matched_text;
         var matches = content.matches;
 
         var cur = this.editor.getCursor();
         var results = CodeMirror.contextHint(this.editor);
         var filtered_results = [];
         //remove results from context completion
         //that are already in kernel completion
         for (var elm in results) {
             if (!_existing_completion(results[elm].str, matches)) {
                 filtered_results.push(results[elm]);
             }
         }
 
         // append the introspection result, in order, at at the beginning of
         // the table and compute the replacement range from current cursor
         // positon and matched_text length.
         for (var i = matches.length - 1; i >= 0; --i) {
             filtered_results.unshift({
                 str: matches[i],
                 type: "introspection",
                 from: {
                     line: cur.line,
                     ch: cur.ch - matched_text.length
                 },
                 to: {
                     line: cur.line,
                     ch: cur.ch
                 }
             });
         }
 
         // one the 2 sources results have been merge, deal with it
         this.raw_result = filtered_results;
 
         // if empty result return
         if (!this.raw_result || !this.raw_result.length) return;
 
         // When there is only one completion, use it directly.
         if (this.autopick && this.raw_result.length == 1) {
             this.insert(this.raw_result[0]);
             return;
         }
 
         if (this.raw_result.length == 1) {
             // test if first and only completion totally matches
             // what is typed, in this case dismiss
             var str = this.raw_result[0].str;
             var pre_cursor = this.editor.getRange({
                 line: cur.line,
                 ch: cur.ch - str.length
             }, cur);
             if (pre_cursor == str) {
                 this.close();
                 return;
             }
         }
 
         this.complete = $('<div/>').addClass('completions');
         this.complete.attr('id', 'complete');
 
         // Currently webkit doesn't use the size attr correctly. See:
         // https://code.google.com/p/chromium/issues/detail?id=4579
         this.sel = $('<select style="width: auto"/>')
+            .attr('tabindex', -1)
             .attr('multiple', 'true')
             .attr('size', Math.min(10, this.raw_result.length));
         this.complete.append(this.sel);
         $('body').append(this.complete);
 
         // After everything is on the page, compute the postion.
         // We put it above the code if it is too close to the bottom of the page.
         cur.ch = cur.ch-matched_text.length;
         var pos = this.editor.cursorCoords(cur);
         var left = pos.left-3;
         var top;
         var cheight = this.complete.height();
         var wheight = $(window).height();
         if (pos.bottom+cheight+5 > wheight) {
             top = pos.top-cheight-4;
         } else {
             top = pos.bottom+1;
         }
         this.complete.css('left', left + 'px');
         this.complete.css('top', top + 'px');
 
 
         //build the container
         var that = this;
         this.sel.dblclick(function () {
             that.pick();
         });
-        this.sel.blur($.proxy(this.close, this));
-        this.sel.keydown(function (event) {
-            // Ignore tab key since it causes the completer to reshow on some 
-            // machines and not with others.  This strange behavior is due to
-            // the fact that we are tricking the notebook into thinking that it
-            // is in edit mode when it's really not.
-            if (IPython.keyboard.event_to_shortcut(event)=='tab') {
-                event.stopPropagation();
-                event.preventDefault();
-            } else {
+        this.editor.on('keydown', function (event) {
                 that.keydown(event);
-            }
         });
-        this.sel.keypress(function (event) {
+        this.editor.on('keypress', function (event) {
             that.keypress(event);
         });
 
         this.build_gui_list(this.raw_result);
 
         this.sel.focus();
-        // Since the completer can and will gain focus and it isn't a component
-        // of the codemirror instance, we need to manually "fake" codemirror as
-        // still being focused.  This is accomplished by calling edit_mode on 
-        // the cell when the completer gains focus, and command mode when the
-        // completer loses focus.  If the completer was an actual, true extension
-        // of codemirror, we wouldn't have to play this game since codemirror 
-        // wouldn't blur when the completer was shown.
-        this.cell.edit_mode();
-        $([IPython.events]).trigger('edit_mode.Notebook');
-        IPython.keyboard_manager.disable();
         // Opera sometimes ignores focusing a freshly created node
         if (window.opera) setTimeout(function () {
             if (!this.done) this.sel.focus();
         }, 100);
         return true;
     };
 
     Completer.prototype.insert = function (completion) {
         this.editor.replaceRange(completion.str, completion.from, completion.to);
     };
 
     Completer.prototype.build_gui_list = function (completions) {
         for (var i = 0; i < completions.length; ++i) {
             var opt = $('<option/>').text(completions[i].str).addClass(completions[i].type);
             this.sel.append(opt);
         }
         this.sel.children().first().attr('selected', 'true');
         this.sel.scrollTop(0);
     };
 
     Completer.prototype.close = function () {
         this.done = true;
         $('#complete').remove();
-        // Since the completer can and will gain focus and it isn't a component
-        // of the codemirror instance, we need to manually "fake" codemirror as
-        // still being focused.  This is accomplished by calling edit_mode on 
-        // the cell when the completer gains focus, and command mode when the
-        // completer loses focus.  If the completer was an actual, true extension
-        // of codemirror, we wouldn't have to play this game since codemirror 
-        // wouldn't blur when the completer was shown.
-        this.cell.command_mode();
-        $([IPython.events]).trigger('command_mode.Notebook');
-        IPython.keyboard_manager.enable();
     };
 
     Completer.prototype.pick = function () {
         this.insert(this.raw_result[this.sel[0].selectedIndex]);
         this.close();
         var that = this;
         setTimeout(function () {
             that.editor.focus();
         }, 50);
     };
 
     Completer.prototype.keydown = function (event) {
         var code = event.keyCode;
         var that = this;
 
         // Enter
         if (code == keycodes.enter) {
             CodeMirror.e_stop(event);
             this.pick();
         }
         // Escape or backspace
         else if (code == keycodes.esc) {
             CodeMirror.e_stop(event);
             this.close();
             this.editor.focus();
 
         } else if (code == keycodes.backspace) {
             this.close();
             this.editor.focus();
         } else if (code == keycodes.tab) {
             //all the fastforwarding operation,
             //Check that shared start is not null which can append with prefixed completion
             // like %pylab , pylab have no shred start, and ff will result in py<tab><tab>
             // to erase py
             var sh = shared_start(this.raw_result, true);
             if (sh) {
                 this.insert(sh);
             }
             this.close();
             CodeMirror.e_stop(event);
             this.editor.focus();
             //reinvoke self
             setTimeout(function () {
                 that.carry_on_completion();
             }, 50);
         } else if (code == keycodes.up || code == keycodes.down) {
             // need to do that to be able to move the arrow
             // when on the first or last line ofo a code cell
             event.stopPropagation();
         }
     };
     
     Completer.prototype.keypress = function (event) {
         // FIXME: This is a band-aid.
         // on keypress, trigger insertion of a single character.
         // This simulates the old behavior of completion as you type,
         // before events were disconnected and CodeMirror stopped
         // receiving events while the completer is focused.
         
         var that = this;
         var code = event.keyCode;
         
         // don't handle keypress if it's not a character (arrows on FF)
         // or ENTER/TAB
         if (event.charCode === 0 ||
             code == keycodes.enter ||
             code == keycodes.tab
         ) return;
         
         var cur = this.editor.getCursor();
         var completion = {
             str: String.fromCharCode(event.which),
             type: "introspection",
             from: cur,
             to: cur,
         };
         this.insert(completion);
         
         this.close();
         this.editor.focus();
         setTimeout(function () {
             that.carry_on_completion();
         }, 50);
     };
 
     IPython.Completer = Completer;
 
     return IPython;
 }(IPython));