aboutsummaryrefslogtreecommitdiff
path: root/js/panels/css-panel/rule-list.reel/rule-list.js
blob: 3e18c3bf5e9582bbfc89a49f63045fbbc2d62f46 (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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
/* <copyright>
 This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
 No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
 (c) Copyright 2011 Motorola Mobility, Inc.  All Rights Reserved.
 </copyright> */

var Montage = require("montage/core/core").Montage,
    Component = require("montage/ui/component").Component;

exports.RuleList = Montage.create(Component, {
    focusDelegate : { value: null },
    ruleNodeName : { value: 'li' },
    _needsScrollToBottom: { value: null },

    _hide : {
        value: null
    },
    hide : {
        get: function() {
            return this._hide;
        },
        set: function(value) {
            if(value === this._hide) { return; }

            this._hide = value;
            this.needsDraw = true;
        }
    },

    childComponents : {
        value: [],
        distinct: true
    },

    rulesToDraw : {
        value: [],
        distinct: true
    },
    rulesToRemove : {
        value: [],
        distinct: true
    },

    update : {
        value: function(rules) {
            this.childComponents.forEach(function(component) {
                component.update();
            }, this);
        }
    },

    _rules: { value: null },
    rules: {
        get: function() {
            return this._rules;
        },
        set: function(list) {
            if(!list) {
                return null;
            }

            var foundIndices = [];

            //// Iterate existing rules, update those which rule exists in new
            //// rule list
            this.childComponents.forEach(function(ruleComponent, i, drawnRules) {
                //// If rule exists in new list, update it
                var index = list.indexOf(ruleComponent.rule);

                if(ruleComponent.rule.type === 'inline') {
                    //// Let's emulate finding the line rule at the first index
                    index = 0;
                }

                if(index !== -1) {
                    // found rule in our component list, or it's the inline rule
                    ruleComponent.update();
                    foundIndices.push(index);
                } else if(!rule.applied) { /// remove rule (unless unapplied)
                    this.rulesToRemove.push(ruleComponent);
                }
            }, this);

            //// Find rules to add
            list.forEach(function(rule, index) {
                //// If we haven't updated the rule already,
                //// we're dealing with a new rule to add
                if(foundIndices.indexOf(index) === -1) {
                    this.addRule(rule, index);
                }
            }, this);

            this._rules = list;

            this.needsDraw = true;

        }
    },

    addRule: {
        value: function(rule, atIndex, applies, drawCallback) {
            var insertIndex = atIndex || this.childComponents.length;

            this.rulesToDraw.push({
                rule: rule,
                index: insertIndex,
                instance : null,
                applies : applies,
                callback : drawCallback
            });

            this.needsDraw = true;
        }
    },

    removeRule: {
        value: function(ruleComponent) {
            this.rulesToRemove.push(ruleComponent);
            this.needsDraw = true;
        }
    },

    willDraw : {
        value: function() {
            this.rulesToDraw.forEach(function(ruleObj) {
                var el = document.createElement(this.ruleNodeName);

                var componentBase = this.supportedRules[ruleObj.rule.type],
                    instance;

                ///// Draw the rule if we have a template for the rule type
                if(!componentBase) { return false; }

                instance = Montage.create(componentBase);
                instance.element = document.createElement(this.ruleNodeName);
                instance.rule = ruleObj.rule;
                instance.applied = ruleObj.applies;

                if(this.focusDelegate) {
                    instance.focusDelegate = this.focusDelegate;
                }

                ruleObj.instance = instance;

            }, this);

        }
    },

    draw : {
        value: function() {
            ///// If needed, scroll to bottom
            if(this._needsScrollToBottom) {
                ///// Make sure the appended rule item is visible (scrolled-to)
                this.element.scrollTop = this.element.offsetHeight;
                this._needsScrollToBottom = false;
            }

            //// Iterate through all rules needing removal
            this.rulesToRemove.forEach(function(ruleComponent) {
                var componentIndex = this.childComponents.indexOf(ruleComponent);
                this.childComponents.splice(componentIndex, 1);
                this.element.removeChild(ruleComponent.element);
            }, this);

            //// Iterate through all rules that need draw and append them
            this.rulesToDraw.forEach(function(ruleObj) {
                var ruleAtIndex = this.childComponents[ruleObj.index];

                if(ruleAtIndex) {
                    //// Insert rule at appropriate index
                    this.element.insertBefore(ruleObj.instance.element, ruleAtIndex.element);
                } else {
                    this.element.appendChild(ruleObj.instance.element);
                }

                this._needsScrollToBottom = this.needsDraw = true;
                this.childComponents.push(ruleObj.instance);
                ruleObj.instance.needsDraw = true;
            }, this);

            if(this.hide) {
                this.element.classList.add('hidden-rule-list');
            } else {
                this.element.classList.remove('hidden-rule-list');
            }

        }
    },

    didDraw : {
        value: function() {
            this.rulesToDraw.forEach(function(ruleObj) {
                if(typeof ruleObj.callback === 'function') {
                    ruleObj.callback(ruleObj.instance);
                }
            });

            this.rulesToRemove.forEach(function(ruleObj) {
                ruleObj.instance = null;
            }, this);

            ///// Null out any rules that were just drawn
            this.rulesToDraw.length = 0;
            this.rulesToRemove.length = 0;

            if(!this.parentComponent.ruleListDrawn) {
                this.parentComponent.ruleListDrawn = true;
                this.parentComponent.needsDraw = true;
            }
        }
    }
});