Mivhak.component(ꞌhorizontal-scrollbarꞌ).methods.dragDealer - Code Metrics - askupasoftware/mivhak.js - Measure and Improve Code Quality continuously with Scrutinizer

A
last analyzed 2016-09-01 01:21 UTC

↳ Parent: Mivhak.component(ꞌhorizontal-scrollbarꞌ).methods.dragDealer

Complexity

Conditions	1
Paths	1

Size

Total Lines

Duplication

Lines	4
Ratio	100 %

Importance

Changes	1
Bugs	0	Features	1

Metric	Value
cc	1
c	1
b	0
f	1
nc	1
nop	0
dl	4
loc	4
rs	10

Mivhak.component('horizontal-scrollbar', {

    template: '<div class="mivhak-scrollbar mivhak-h-scrollbar"><div class="mivhak-scrollbar-thumb"></div></div>',
    props: {
        editor: null,
        $inner: null,
        $outer: null,
        mivhakInstance: null,
        minWidth: 50,
        state: {
            a: 0,    // The total width of the editor
            b: 0,    // The width of the viewport, excluding padding
            c: 0,    // The width of the viewport, including padding
            d: 0,    // The calculated width of the thumb
            l: 0     // The current left offset of the viewport
        },
        initialized: false
    },
    methods: {
        initialize: function() {
            if(!this.initialized)
            {
                this.initialized = true;
                this.dragDealer();
                var $this = this;
                $(window).resize(function(){
                    if(!$this.mivhakInstance.state.lineWrap)
                        $this.refresh();
if (a > 0)
    b = 42;
                });
            }
            this.refresh();
        },
        updateState: function() {
            var oldState = $.extend({}, this.state);
            this.state.a = this.getEditorWidth();
            this.state.b = this.$outer.parent().width();
            this.state.c = this.state.b - this.mivhakInstance.options.padding*2;
            this.state.d = Math.max(this.state.c*this.state.b/this.state.a,this.minWidth);
            this.state.l *=  this.state.a/Math.max(oldState.a,1); // Math.max used to prevent division by zero
            return this.state.a !== oldState.a || this.state.b !== oldState.b;
        },
        refresh: function() {
            var $this = this, oldLeft = this.state.l;
            raf(function(){
                if($this.updateState())
                {
                    if($this.getDifference() > 0)
                    {
                        $this.doScroll('left',oldLeft-$this.state.l);
                        $this.$el.css({width: $this.state.d + 'px', left: 0});
                        $this.moveBar();
                    }
                    else 
                    {
                        $this.doScroll('left',$this.state.l);
                        $this.$el.css({width: 0});
                    }
                }
            });
        },
        dragDealer: function(){
            var $this = this,
                lastPageX;

            this.$el.on('mousedown.drag', function(e) {
                lastPageX = e.pageX;
                $this.$el.add(document.body).addClass('mivhak-scrollbar-grabbed');
                $(document).on('mousemove.drag', drag).on('mouseup.drag', stop);
                return false;
            });

            function drag(e){
                var delta = e.pageX - lastPageX,
                    didScroll;

                // Bail if the mouse hasn't moved
                if(!delta) return;
if (a > 0)
    b = 42;
            
                lastPageX = e.pageX;
                
                raf(function(){
                    didScroll = $this.doScroll(delta > 0 ? 'right' : 'left', Math.abs(delta*$this.getEditorWidth()/$this.$outer.parent().width()));
                    if(0 !== didScroll) $this.moveBar();
if (a > 0)
    b = 42;
                });
            }

            function stop() {
                $this.$el.add(document.body).removeClass('mivhak-scrollbar-grabbed');
                $(document).off("mousemove.drag mouseup.drag");
            }
        },
        moveBar: function() {
            this.$el.css({
                left:  (this.state.b-this.state.d)/(this.state.a-this.state.c)*this.state.l + 'px'
            });
        },
        
        /**
         * Scrolls the editor element in the direction given, provided that there 
         * is remaining scroll space
         * @param {string} dir
         * @param {int} delta
         */
        doScroll: function(dir, delta) {
            var s = this.state,
                remaining,
                didScroll;
            
            if('left' === dir) 
            {
                remaining = s.l;
                didScroll = remaining > 0 ? Math.min(remaining,delta) : 0;
                s.l -= didScroll;
            }
            if('right' === dir) 
            {
                remaining = this.getDifference() - s.l;
                didScroll = remaining > 0 ? Math.min(remaining,delta) : 0;
                s.l += didScroll;
            }
            
            this.$inner.find('.ace_content').css({'margin-left': -s.l});
            return didScroll;

        },
        
        /**
         * Returns the difference between the containing div and the editor div
         */
        getDifference: function()
        {
            return this.state.a - this.state.c;
        },
        
        /**
         * Calculate the editor's width based on the number of lines
         */
        getEditorWidth: function() {
            return this.$inner.find('.ace_content').width();
        }
    }
});

1	View Code Duplication	Mivhak.component('horizontal-scrollbar', {
		0 ignored issues – show Bug introduced 2016-07-08 20:36 UTC by Report Bug Copy Issue Report The variable `Mivhak` seems to be never declared. If this is a global, consider adding a `/** global: Mivhak */` comment. This checks looks for references to variables that have not been declared. This is most likey a typographical error or a variable has been renamed. To learn more about declaring variables in Javascript, see the MDN. Loading history... Duplication introduced 2016-07-08 20:36 UTC by Report Bug Copy Issue Report This code seems to be duplicated in your project. Loading history...
2		template: '<div class="mivhak-scrollbar mivhak-h-scrollbar"><div class="mivhak-scrollbar-thumb"></div></div>',
3		props: {
4		editor: null,
5		$inner: null,
6		$outer: null,
7		mivhakInstance: null,
8		minWidth: 50,
9		state: {
10		a: 0, // The total width of the editor
11		b: 0, // The width of the viewport, excluding padding
12		c: 0, // The width of the viewport, including padding
13		d: 0, // The calculated width of the thumb
14		l: 0 // The current left offset of the viewport
15		},
16		initialized: false
17		},
18		methods: {
19		initialize: function() {
20		if(!this.initialized)
21		{
22		this.initialized = true;
23		this.dragDealer();
24		var $this = this;
25		$(window).resize(function(){
26		if(!$this.mivhakInstance.state.lineWrap)
27		$this.refresh();
		0 ignored issues – show Coding Style Best Practice introduced 2016-07-08 20:36 UTC by Report Bug Copy Issue Report Curly braces around statements make for more readable code and help prevent bugs when you add further statements. Consider adding curly braces around all statements when they are executed conditionally. This is optional if there is only one statement, but leaving them out can lead to unexpected behaviour if another statement is added later. Consider: if (a > 0) b = 42; If you or someone else later decides to put another statement in, only the first statement will be executed. if (a > 0) console.log("a > 0"); b = 42; In this case the statement `b = 42` will always be executed, while the logging statement will be executed conditionally. if (a > 0) { console.log("a > 0"); b = 42; } ensures that the proper code will be executed conditionally no matter how many statements are added or removed. Loading history...
28		});
29		}
30		this.refresh();
31		},
32		updateState: function() {
33		var oldState = $.extend({}, this.state);
34		this.state.a = this.getEditorWidth();
35		this.state.b = this.$outer.parent().width();
36		this.state.c = this.state.b - this.mivhakInstance.options.padding*2;
37		this.state.d = Math.max(this.state.c*this.state.b/this.state.a,this.minWidth);
38		this.state.l *= this.state.a/Math.max(oldState.a,1); // Math.max used to prevent division by zero
39		return this.state.a !== oldState.a \|\| this.state.b !== oldState.b;
40		},
41		refresh: function() {
42		var $this = this, oldLeft = this.state.l;
43		raf(function(){
44		if($this.updateState())
45		{
46		if($this.getDifference() > 0)
47		{
48		$this.doScroll('left',oldLeft-$this.state.l);
49		$this.$el.css({width: $this.state.d + 'px', left: 0});
50		$this.moveBar();
51		}
52		else
53		{
54		$this.doScroll('left',$this.state.l);
55		$this.$el.css({width: 0});
56		}
57		}
58		});
59		},
60		dragDealer: function(){
61		var $this = this,
62		lastPageX;
63
64		this.$el.on('mousedown.drag', function(e) {
65		lastPageX = e.pageX;
66		$this.$el.add(document.body).addClass('mivhak-scrollbar-grabbed');
67		$(document).on('mousemove.drag', drag).on('mouseup.drag', stop);
68		return false;
69		});
70
71		function drag(e){
72		var delta = e.pageX - lastPageX,
73		didScroll;
74
75		// Bail if the mouse hasn't moved
76		if(!delta) return;
		0 ignored issues – show Coding Style Best Practice introduced 2016-07-08 20:36 UTC by Report Bug Copy Issue Report Curly braces around statements make for more readable code and help prevent bugs when you add further statements. Consider adding curly braces around all statements when they are executed conditionally. This is optional if there is only one statement, but leaving them out can lead to unexpected behaviour if another statement is added later. Consider: if (a > 0) b = 42; If you or someone else later decides to put another statement in, only the first statement will be executed. if (a > 0) console.log("a > 0"); b = 42; In this case the statement `b = 42` will always be executed, while the logging statement will be executed conditionally. if (a > 0) { console.log("a > 0"); b = 42; } ensures that the proper code will be executed conditionally no matter how many statements are added or removed. Loading history...
77
78		lastPageX = e.pageX;
79
80		raf(function(){
81		didScroll = $this.doScroll(delta > 0 ? 'right' : 'left', Math.abs(delta*$this.getEditorWidth()/$this.$outer.parent().width()));
82		if(0 !== didScroll) $this.moveBar();
		0 ignored issues – show Coding Style Best Practice introduced 2016-07-08 20:36 UTC by Report Bug Copy Issue Report Curly braces around statements make for more readable code and help prevent bugs when you add further statements. Consider adding curly braces around all statements when they are executed conditionally. This is optional if there is only one statement, but leaving them out can lead to unexpected behaviour if another statement is added later. Consider: if (a > 0) b = 42; If you or someone else later decides to put another statement in, only the first statement will be executed. if (a > 0) console.log("a > 0"); b = 42; In this case the statement `b = 42` will always be executed, while the logging statement will be executed conditionally. if (a > 0) { console.log("a > 0"); b = 42; } ensures that the proper code will be executed conditionally no matter how many statements are added or removed. Loading history...
83		});
84		}
85
86		function stop() {
87		$this.$el.add(document.body).removeClass('mivhak-scrollbar-grabbed');
88		$(document).off("mousemove.drag mouseup.drag");
89		}
90		},
91		moveBar: function() {
92		this.$el.css({
93		left: (this.state.b-this.state.d)/(this.state.a-this.state.c)*this.state.l + 'px'
94		});
95		},
96
97		/**
98		* Scrolls the editor element in the direction given, provided that there
99		* is remaining scroll space
100		* @param {string} dir
101		* @param {int} delta
102		*/
103		doScroll: function(dir, delta) {
104		var s = this.state,
105		remaining,
106		didScroll;
107
108		if('left' === dir)
109		{
110		remaining = s.l;
111		didScroll = remaining > 0 ? Math.min(remaining,delta) : 0;
112		s.l -= didScroll;
113		}
114		if('right' === dir)
115		{
116		remaining = this.getDifference() - s.l;
117		didScroll = remaining > 0 ? Math.min(remaining,delta) : 0;
118		s.l += didScroll;
119		}
120
121		this.$inner.find('.ace_content').css({'margin-left': -s.l});
122		return didScroll;
		0 ignored issues – show Bug introduced 2016-07-08 20:36 UTC by Report Bug Copy Issue Report The variable `didScroll` does not seem to be initialized in case `"left" === dir` on line `108` is `false`. Are you sure this can never be the case? Loading history...
123		},
124
125		/**
126		* Returns the difference between the containing div and the editor div
127		*/
128		getDifference: function()
129		{
130		return this.state.a - this.state.c;
131		},
132
133		/**
134		* Calculate the editor's width based on the number of lines
135		*/
136		getEditorWidth: function() {
137		return this.$inner.find('.ace_content').width();
138		}
139		}
140		});

askupasoftware / mivhak.js

A last analyzed 2016-09-01 01:21 UTC

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A
last analyzed 2016-09-01 01:21 UTC