Droppable: only consider pointer location with tolerance "pointer"

Fixes #4977
Closes gh-991

tests/unit/droppable/droppable_options.js

@@ -96,7 +96,7 @@ test( "tolerance, intersect", function() {
*/

test( "tolerance, pointer", function() {
	expect( 2 );
	expect( 3 );

	var draggable, droppable,
		dataset = [
@@ -132,6 +132,19 @@ test( "tolerance, pointer", function() {
			dy: ( data[ 1 ] - $( draggable ).position().top )
		});
	});

	// http://bugs.jqueryui.com/ticket/4977 - tolerance, pointer - bug when pointer outside draggable
	draggable.css({ top: 0, left: 0 }).draggable( "option", "axis", "x" );
	droppable.css({ top: 15, left: 15 });

	droppable.unbind( "drop" ).bind( "drop", function() {
		ok( true, "drop fires as long as pointer is within droppable" );
	});

	$( draggable ).simulate( "drag", {
		dx: 10,
		dy: 10
	});
});

/*

ui/droppable.js

@@ -191,7 +191,7 @@ $.widget( "ui.droppable", {
				!inst.options.disabled &&
				inst.options.scope === draggable.options.scope &&
				inst.accept.call( inst.element[ 0 ], ( draggable.currentItem || draggable.element ) ) &&
				$.ui.intersect( draggable, $.extend( inst, { offset: inst.element.offset() } ), inst.options.tolerance )
				$.ui.intersect( draggable, $.extend( inst, { offset: inst.element.offset() } ), inst.options.tolerance, event )
			) { childrenIntersection = true; return false; }
		});
		if ( childrenIntersection ) {
@@ -229,14 +229,13 @@ $.ui.intersect = (function() {
		return ( x >= reference ) && ( x < ( reference + size ) );
	}

	return function( draggable, droppable, toleranceMode ) {
	return function( draggable, droppable, toleranceMode, event ) {

		if ( !droppable.offset ) {
			return false;
		}

		var draggableLeft, draggableTop,
			x1 = ( draggable.positionAbs || draggable.position.absolute ).left,
		var x1 = ( draggable.positionAbs || draggable.position.absolute ).left,
			y1 = ( draggable.positionAbs || draggable.position.absolute ).top,
			x2 = x1 + draggable.helperProportions.width,
			y2 = y1 + draggable.helperProportions.height,
@@ -254,9 +253,7 @@ $.ui.intersect = (function() {
				t < y1 + ( draggable.helperProportions.height / 2 ) && // Bottom Half
				y2 - ( draggable.helperProportions.height / 2 ) < b ); // Top Half
		case "pointer":
			draggableLeft = ( ( draggable.positionAbs || draggable.position.absolute ).left + ( draggable.clickOffset || draggable.offset.click ).left );
			draggableTop = ( ( draggable.positionAbs || draggable.position.absolute ).top + ( draggable.clickOffset || draggable.offset.click ).top );
			return isOverAxis( draggableTop, t, droppable.proportions().height ) && isOverAxis( draggableLeft, l, droppable.proportions().width );
			return isOverAxis( event.pageY, t, droppable.proportions().height ) && isOverAxis( event.pageX, l, droppable.proportions().width );
		case "touch":
			return (
				( y1 >= t && y1 <= b ) || // Top edge touching
@@ -326,7 +323,7 @@ $.ui.ddmanager = {
			if ( !this.options ) {
				return;
			}
			if ( !this.options.disabled && this.visible && $.ui.intersect( draggable, this, this.options.tolerance ) ) {
			if ( !this.options.disabled && this.visible && $.ui.intersect( draggable, this, this.options.tolerance, event ) ) {
				dropped = this._drop.call( this, event ) || dropped;
			}

@@ -363,7 +360,7 @@ $.ui.ddmanager = {
			}

			var parentInstance, scope, parent,
				intersects = $.ui.intersect( draggable, this, this.options.tolerance ),
				intersects = $.ui.intersect( draggable, this, this.options.tolerance, event ),
				c = !intersects && this.isover ? "isout" : ( intersects && !this.isover ? "isover" : null );
			if ( !c ) {
				return;