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Add Distance Mode #52

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282 changes: 170 additions & 112 deletions spatial_navigation.js
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@
selector: '', // can be a valid <extSelector> except "@" syntax.
straightOnly: false,
straightOverlapThreshold: 0.5,
distanceMode: false,
rememberSource: false,
disabled: false,
defaultElement: '', // <extSelector> except "@" syntax.
Expand Down Expand Up @@ -222,7 +223,26 @@
},
rightIsBetter: function(rect) {
return -1 * rect.right;
}
},
nearDistanceIsBetter: function (rect) {
var dx, dy;
if (rect.center.y < targetRect.center.y) {
dy = targetRect.top - rect.bottom;
} else {
dy = rect.top - targetRect.bottom;
}

if (rect.center.x < targetRect.center.x) {
dx = targetRect.left - rect.right;
} else {
dx = rect.left - targetRect.right;
}

dx = dx < 0 ? 0 : dx;
dy = dy < 0 ? 0 : dy;

return Math.sqrt(dx * dx + dy * dy);
},
};
}

Expand Down Expand Up @@ -291,120 +311,158 @@
);

var priorities;
if(config.distanceMode === true)
{
var candidatePartitions;
var _targetInternelGroup = [];
var _targetGroup = [];
switch (direction) {
case "left":
candidatePartitions = [0, 3, 6];
break;
case "right":
candidatePartitions = [2, 5, 8];
break;
case "up":
candidatePartitions = [0, 1, 2];
break;
case "down":
candidatePartitions = [6, 7, 8];
break;
}

switch (direction) {
case 'left':
priorities = [
{
group: internalGroups[0].concat(internalGroups[3])
.concat(internalGroups[6]),
distance: [
distanceFunction.nearPlumbLineIsBetter,
distanceFunction.topIsBetter
]
},
{
group: groups[3],
distance: [
distanceFunction.nearPlumbLineIsBetter,
distanceFunction.topIsBetter
]
},
{
group: groups[0].concat(groups[6]),
distance: [
distanceFunction.nearHorizonIsBetter,
distanceFunction.rightIsBetter,
distanceFunction.nearTargetTopIsBetter
]
}
];
break;
case 'right':
priorities = [
{
group: internalGroups[2].concat(internalGroups[5])
.concat(internalGroups[8]),
distance: [
distanceFunction.nearPlumbLineIsBetter,
distanceFunction.topIsBetter
]
},
{
group: groups[5],
distance: [
distanceFunction.nearPlumbLineIsBetter,
distanceFunction.topIsBetter
]
},
{
group: groups[2].concat(groups[8]),
distance: [
distanceFunction.nearHorizonIsBetter,
distanceFunction.leftIsBetter,
distanceFunction.nearTargetTopIsBetter
]
}
];
break;
case 'up':
priorities = [
{
group: internalGroups[0].concat(internalGroups[1])
.concat(internalGroups[2]),
distance: [
distanceFunction.nearHorizonIsBetter,
distanceFunction.leftIsBetter
]
},
{
group: groups[1],
distance: [
distanceFunction.nearHorizonIsBetter,
distanceFunction.leftIsBetter
]
},
{
group: groups[0].concat(groups[2]),
distance: [
distanceFunction.nearPlumbLineIsBetter,
distanceFunction.bottomIsBetter,
distanceFunction.nearTargetLeftIsBetter
]
}
];
break;
case 'down':
priorities = [
{
group: internalGroups[6].concat(internalGroups[7])
.concat(internalGroups[8]),
distance: [
distanceFunction.nearHorizonIsBetter,
distanceFunction.leftIsBetter
]
},
{
group: groups[7],
distance: [
distanceFunction.nearHorizonIsBetter,
distanceFunction.leftIsBetter
]
},
{
group: groups[6].concat(groups[8]),
distance: [
distanceFunction.nearPlumbLineIsBetter,
distanceFunction.topIsBetter,
distanceFunction.nearTargetLeftIsBetter
]
}
];
break;
default:
return null;
candidatePartitions.forEach(function (index) {
_targetInternelGroup = _targetInternelGroup.concat(internalGroups[index]);
_targetGroup = _targetGroup.concat(groups[index]);
});

priorities = [
{
group: _targetInternelGroup,
distance: [distanceFunction.nearDistanceIsBetter],
},
{
group: _targetGroup,
distance: [distanceFunction.nearDistanceIsBetter],
},
];
}
else{
switch (direction) {
case 'left':
priorities = [
{
group: internalGroups[0].concat(internalGroups[3])
.concat(internalGroups[6]),
distance: [
distanceFunction.nearPlumbLineIsBetter,
distanceFunction.topIsBetter
]
},
{
group: groups[3],
distance: [
distanceFunction.nearPlumbLineIsBetter,
distanceFunction.topIsBetter
]
},
{
group: groups[0].concat(groups[6]),
distance: [
distanceFunction.nearHorizonIsBetter,
distanceFunction.rightIsBetter,
distanceFunction.nearTargetTopIsBetter
]
}
];
break;
case 'right':
priorities = [
{
group: internalGroups[2].concat(internalGroups[5])
.concat(internalGroups[8]),
distance: [
distanceFunction.nearPlumbLineIsBetter,
distanceFunction.topIsBetter
]
},
{
group: groups[5],
distance: [
distanceFunction.nearPlumbLineIsBetter,
distanceFunction.topIsBetter
]
},
{
group: groups[2].concat(groups[8]),
distance: [
distanceFunction.nearHorizonIsBetter,
distanceFunction.leftIsBetter,
distanceFunction.nearTargetTopIsBetter
]
}
];
break;
case 'up':
priorities = [
{
group: internalGroups[0].concat(internalGroups[1])
.concat(internalGroups[2]),
distance: [
distanceFunction.nearHorizonIsBetter,
distanceFunction.leftIsBetter
]
},
{
group: groups[1],
distance: [
distanceFunction.nearHorizonIsBetter,
distanceFunction.leftIsBetter
]
},
{
group: groups[0].concat(groups[2]),
distance: [
distanceFunction.nearPlumbLineIsBetter,
distanceFunction.bottomIsBetter,
distanceFunction.nearTargetLeftIsBetter
]
}
];
break;
case 'down':
priorities = [
{
group: internalGroups[6].concat(internalGroups[7])
.concat(internalGroups[8]),
distance: [
distanceFunction.nearHorizonIsBetter,
distanceFunction.leftIsBetter
]
},
{
group: groups[7],
distance: [
distanceFunction.nearHorizonIsBetter,
distanceFunction.leftIsBetter
]
},
{
group: groups[6].concat(groups[8]),
distance: [
distanceFunction.nearPlumbLineIsBetter,
distanceFunction.topIsBetter,
distanceFunction.nearTargetLeftIsBetter
]
}
];
break;
default:
return null;
}
}


if (config.straightOnly) {
priorities.pop();
}
Expand Down