summaryrefslogtreecommitdiff
path: root/js/codeq/hint.js
blob: ffae638c339f5411cb2a5ac23b764f7f706482e7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
/**
 * Creates a hint handler, displaying hints inside the provided jqHints <div>.
 */

(function () {
    // constants
    var firstCharacterPos = {'line': 0, 'ch': 0},
        sel_no_scroll = {'scroll': false};

    codeq.makeHinter = function (jqHints, jqEditor, editor, hintDefs) {
        var hintCounter = 0, // for generating unique class-names
            hintCleaners = [],
            clearHints = function () {
                var i;
                for (i = hintCleaners.length - 1; i >= 0; i--) {
                    hintCleaners[i]();
                }
                hintCleaners.length = 0;
                hintCounter = 0;
            },
            addMark = function (start, end) {
                var posStart = editor.posFromIndex(start),
                    posEnd = editor.posFromIndex(end),
                    doc = editor.getDoc(),
                    mark = doc.markText(posStart, posEnd, {'className': 'editor-mark _emark_' + hintCounter}),
                    result = {'start': posStart, 'end': posEnd, 'mark': mark, 'className': '_emark_' + hintCounter};
                hintCleaners.push(function () { mark.clear(); mark = null; doc = null; result.mark = null; });
                hintCounter++;
                return result;
            },
            processTemplate = function (template, args) {
                if (!args)
                    return template;
                return template.replace(/\[%=(\w+)%\]/g, function(match, name) {
                    return args[name];
                });
            },
            typeHandlers = {
                'static': function (type, template, serverHint) {
                    codeq.log.debug('Processing static hint');
                    var message = processTemplate(template, serverHint.args);
                    jqHints.append('<div class="hint-static">' + message + '</div>');
                    // no hint cleaner here, a static hint remains on the screen
                },

                'popup': function (type, template, serverHint) {
                    codeq.log.debug('Processing popup hint');
                    var message = processTemplate(template, serverHint.args),
                        mark = addMark(serverHint.start, serverHint.end), // add the mark
                        jqMark = jqEditor.find('.' + mark.className);

                    jqMark.popover({'content': message, 'html': true, 'placement': 'auto bottom', 'trigger': 'hover focus click', 'container': 'body'});
                    hintCleaners.push(function () { if (jqMark) { jqMark.popover('destroy'); jqMark = null; } });

                    mark.mark.on('', function () {});
                },

                'dropdown': function (type, template, serverHint) {
                    codeq.log.debug('Processing dropdown hint');
                    var completion = null, // the completion object, created in showHint()
                        close = function () {
                            if (completion) {
                                completion.close();
                                completion = null;
                            }
                        };

                    if (/*(editor.listSelections().length > 1) ||*/ editor.somethingSelected()) {
                        // showHint() doesn't work if a selection is activeparts
                        editor.setSelection(firstCharacterPos, firstCharacterPos, sel_no_scroll); // deselect anything
                    }

                    editor.showHint({
                        hint: function () {
                            var hints = {
                                list: serverHint.choices,
                                from: editor.posFromIndex(serverHint.start),
                                to: editor.posFromIndex(serverHint.end)
                            };
                            completion = editor.state.completionActive;
                            return hints;
                        },
                        completeOnSingleClick: true,
                        completeSingle: false
                    });

                    hintCleaners.push(close);
                }
            };

        return {
            /**
             * Processes and display appropriately the server hints.
             * TODO: sort hints so static and popup hints come first, and a (single) drop-down hint last
             *
             * @param {ServerHint[]} serverHints an array of hints from the server
             */
            'handle': function (serverHints) {
                var n = serverHints.length,
                    /** number */ i,
                    /** ServerHint */ serverHint,
                    /** HintDefinition */ hintDef,
                    hintType, hintTemplate, t, fn, indices;
                clearHints();
                for (i = 0; i < n; i++) {
                    serverHint = serverHints[i];
                    hintDef = hintDefs[serverHint.id];
                    if (serverHint.indices) {
                        indices = serverHint.indices
                        for (i = 0; i < indices.length; i++) {
                            hintDef = hintDef[indices[i]];
                            if (!hintDef)
                                break;
                        }
                    }
                    if (!hintDef) {
                        codeq.log.error('Undefined hint ' + serverHint.id + ' with indices ' + serverHint.indices);
                        continue;
                    }
                    t = typeof hintDef;
                    if (t === 'object') {
                        hintType = hintDef.type;
                        hintTemplate = hintDef.message;
                    }
                    else if (t === 'string') {
                        hintType = 'static';
                        hintTemplate = hintDef;
                    }
                    else {
                        codeq.log.error('Unsupported hint definition: ' + t);
                        continue;
                    }

                    fn = typeHandlers[hintType];
                    if (!fn) codeq.log.error('Unsupported hint type: ' + hintType);
                    else fn(hintType, hintTemplate, serverHint);
                }
            },

            'destroy': function () {
                clearHints();
                jqHints.empty();
                jqHints = null;
                jqEditor = null;
                editor = null;
            }
        };
    };
})();