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/*
* imgAreaSelect jQuery plugin
* version 0.9.10-monkey
*
* Copyright (c) 2008-2013 Michal Wojciechowski (odyniec.net)
*
* Dual licensed under the MIT (MIT-LICENSE.txt)
* and GPL (GPL-LICENSE.txt) licenses.
*
* https://github.com/odyniec/imgareaselect
*
*/
(function($) {
/*
* Math functions will be used extensively, so it's convenient to make a few
* shortcuts
*/
var abs = Math.abs,
max = Math.max,
min = Math.min,
round = Math.round;
/**
* Create a new HTML div element
*
* @return A jQuery object representing the new element
*/
function div() {
return $('<div/>');
}
/**
* imgAreaSelect initialization
*
* @param img
* A HTML image element to attach the plugin to
* @param options
* An options object
*/
$.imgAreaSelect = function (img, options) {
var
/* jQuery object representing the image */
$img = $(img),
/* Has the image finished loading? */
imgLoaded,
/* Plugin elements */
/* Container box */
$box = div(),
/* Selection area */
$area = div(),
/* Border (four divs) */
$border = div().add(div()).add(div()).add(div()),
/* Outer area (four divs) */
$outer = div().add(div()).add(div()).add(div()),
/* Handles (empty by default, initialized in setOptions()) */
$handles = $([]),
/*
* Additional element to work around a cursor problem in Opera
* (explained later)
*/
$areaOpera,
/* Image position (relative to viewport) */
left, top,
/* Image offset (as returned by .offset()) */
imgOfs = { left: 0, top: 0 },
/* Image dimensions (as returned by .width() and .height()) */
imgWidth, imgHeight,
/*
* jQuery object representing the parent element that the plugin
* elements are appended to
*/
$parent,
/* Parent element offset (as returned by .offset()) */
parOfs = { left: 0, top: 0 },
/* Base z-index for plugin elements */
zIndex = 0,
/* Plugin elements position */
position = 'absolute',
/* X/Y coordinates of the starting point for move/resize operations */
startX, startY,
/* Horizontal and vertical scaling factors */
scaleX, scaleY,
/* Current resize mode ("nw", "se", etc.) */
resize,
/* Selection area constraints */
minWidth, minHeight, maxWidth, maxHeight,
/* Aspect ratio to maintain (floating point number) */
aspectRatio,
/* Are the plugin elements currently displayed? */
shown,
/* Current selection (relative to parent element) */
x1, y1, x2, y2,
/* Current selection (relative to scaled image) */
selection = { x1: 0, y1: 0, x2: 0, y2: 0, width: 0, height: 0 },
/* Document element */
docElem = document.documentElement,
/* User agent */
ua = navigator.userAgent,
/* Various helper variables used throughout the code */
$p, d, i, o, w, h, adjusted;
/*
* Translate selection coordinates (relative to scaled image) to viewport
* coordinates (relative to parent element)
*/
/**
* Translate selection X to viewport X
*
* @param x
* Selection X
* @return Viewport X
*/
function viewX(x) {
return x + imgOfs.left - parOfs.left;
}
/**
* Translate selection Y to viewport Y
*
* @param y
* Selection Y
* @return Viewport Y
*/
function viewY(y) {
return y + imgOfs.top - parOfs.top;
}
/*
* Translate viewport coordinates to selection coordinates
*/
/**
* Translate viewport X to selection X
*
* @param x
* Viewport X
* @return Selection X
*/
function selX(x) {
return x - imgOfs.left + parOfs.left;
}
/**
* Translate viewport Y to selection Y
*
* @param y
* Viewport Y
* @return Selection Y
*/
function selY(y) {
return y - imgOfs.top + parOfs.top;
}
/*
* Translate event coordinates (relative to document) to viewport
* coordinates
*/
/**
* Get event X and translate it to viewport X
*
* @param event
* The event object
* @return Viewport X
*/
function evX(event) {
return max(event.pageX || 0, touchCoords(event).x) - parOfs.left;
}
/**
* Get event Y and translate it to viewport Y
*
* @param event
* The event object
* @return Viewport Y
*/
function evY(event) {
return max(event.pageY || 0, touchCoords(event).y) - parOfs.top;
}
/**
* Get X and Y coordinates of a touch event
*
* @param event
* The event object
* @return Coordinates object
*/
function touchCoords(event) {
var oev = event.originalEvent || {};
if (oev.touches && oev.touches.length)
return { x: oev.touches[0].pageX, y: oev.touches[0].pageY };
else
return { x: 0, y: 0 };
}
/**
* Get the current selection
*
* @param noScale
* If set to <code>true</code>, scaling is not applied to the
* returned selection
* @return Selection object
*/
function getSelection(noScale) {
var sx = noScale || scaleX, sy = noScale || scaleY;
return { x1: round(selection.x1 * sx),
y1: round(selection.y1 * sy),
x2: round(selection.x2 * sx),
y2: round(selection.y2 * sy),
width: round(selection.x2 * sx) - round(selection.x1 * sx),
height: round(selection.y2 * sy) - round(selection.y1 * sy) };
}
/**
* Set the current selection
*
* @param x1
* X coordinate of the upper left corner of the selection area
* @param y1
* Y coordinate of the upper left corner of the selection area
* @param x2
* X coordinate of the lower right corner of the selection area
* @param y2
* Y coordinate of the lower right corner of the selection area
* @param noScale
* If set to <code>true</code>, scaling is not applied to the
* new selection
*/
function setSelection(x1, y1, x2, y2, noScale) {
var sx = noScale || scaleX, sy = noScale || scaleY;
selection = {
x1: round(x1 / sx || 0),
y1: round(y1 / sy || 0),
x2: round(x2 / sx || 0),
y2: round(y2 / sy || 0)
};
selection.width = selection.x2 - selection.x1;
selection.height = selection.y2 - selection.y1;
}
/**
* Recalculate image and parent offsets
*/
function adjust() {
/*
* Do not adjust if image has not yet loaded or if width is not a
* positive number. The latter might happen when imgAreaSelect is put
* on a parent element which is then hidden.
*/
if (!imgLoaded || !$img.width())
return;
/*
* Get image offset. The .offset() method returns float values, so they
* need to be rounded.
*/
imgOfs = { left: round($img.offset().left), top: round($img.offset().top) };
/* Get image dimensions */
imgWidth = $img.innerWidth();
imgHeight = $img.innerHeight();
imgOfs.top += ($img.outerHeight() - imgHeight) >> 1;
imgOfs.left += ($img.outerWidth() - imgWidth) >> 1;
/* Set minimum and maximum selection area dimensions */
minWidth = round(options.minWidth / scaleX) || 0;
minHeight = round(options.minHeight / scaleY) || 0;
maxWidth = round(min(options.maxWidth / scaleX || 1<<24, imgWidth));
maxHeight = round(min(options.maxHeight / scaleY || 1<<24, imgHeight));
/*
* Workaround for jQuery 1.3.2 incorrect offset calculation, originally
* observed in Safari 3. Firefox 2 is also affected.
*/
if ($().jquery == '1.3.2' && position == 'fixed' &&
!docElem['getBoundingClientRect'])
{
imgOfs.top += max(document.body.scrollTop, docElem.scrollTop);
imgOfs.left += max(document.body.scrollLeft, docElem.scrollLeft);
}
/* Determine parent element offset */
parOfs = /absolute|relative/.test($parent.css('position')) ?
{ left: round($parent.offset().left) - $parent.scrollLeft(),
top: round($parent.offset().top) - $parent.scrollTop() } :
position == 'fixed' ?
{ left: $(document).scrollLeft(), top: $(document).scrollTop() } :
{ left: 0, top: 0 };
left = viewX(0);
top = viewY(0);
/*
* Check if selection area is within image boundaries, adjust if
* necessary
*/
if (selection.x2 > imgWidth || selection.y2 > imgHeight)
doResize();
}
/**
* Update plugin elements
*
* @param resetKeyPress
* If set to <code>false</code>, this instance's keypress
* event handler is not activated
*/
function update(resetKeyPress) {
/* If plugin elements are hidden, do nothing */
if (!shown) return;
/*
* Set the position and size of the container box and the selection area
* inside it
*/
$box.css({ left: viewX(selection.x1), top: viewY(selection.y1) })
.add($area).width(w = selection.width).height(h = selection.height);
/*
* Reset the position of selection area, borders, and handles (IE6/IE7
* position them incorrectly if we don't do this)
*/
$area.add($border).add($handles).css({ left: 0, top: 0 });
/* Set border dimensions */
$border
.width(max(w - $border.outerWidth() + $border.innerWidth(), 0))
.height(max(h - $border.outerHeight() + $border.innerHeight(), 0));
/* Arrange the outer area elements */
$($outer[0]).css({ left: left, top: top,
width: selection.x1, height: imgHeight });
$($outer[1]).css({ left: left + selection.x1, top: top,
width: w, height: selection.y1 });
$($outer[2]).css({ left: left + selection.x2, top: top,
width: imgWidth - selection.x2, height: imgHeight });
$($outer[3]).css({ left: left + selection.x1, top: top + selection.y2,
width: w, height: imgHeight - selection.y2 });
w -= $handles.outerWidth();
h -= $handles.outerHeight();
/* Arrange handles */
switch ($handles.length) {
case 8:
$($handles[4]).css({ left: w >> 1 });
$($handles[5]).css({ left: w, top: h >> 1 });
$($handles[6]).css({ left: w >> 1, top: h });
$($handles[7]).css({ top: h >> 1 });
case 4:
$handles.slice(1,3).css({ left: w });
$handles.slice(2,4).css({ top: h });
}
if (resetKeyPress !== false) {
/*
* Need to reset the document keypress event handler -- unbind the
* current handler
*/
if ($.imgAreaSelect.onKeyPress != docKeyPress)
$(document).unbind($.imgAreaSelect.keyPress,
$.imgAreaSelect.onKeyPress);
if (options.keys)
/*
* Set the document keypress event handler to this instance's
* docKeyPress() function
*/
$(document)[$.imgAreaSelect.keyPress](
$.imgAreaSelect.onKeyPress = docKeyPress);
}
/*
* Internet Explorer displays 1px-wide dashed borders incorrectly by
* filling the spaces between dashes with white. Toggling the margin
* property between 0 and "auto" fixes this in IE6 and IE7 (IE8 is still
* broken). This workaround is not perfect, as it requires setTimeout()
* and thus causes the border to flicker a bit, but I haven't found a
* better solution.
*
* Note: This only happens with CSS borders, set with the borderWidth,
* borderOpacity, borderColor1, and borderColor2 options (which are now
* deprecated). Borders created with GIF background images are fine.
*/
if (msie && $border.outerWidth() - $border.innerWidth() == 2) {
$border.css('margin', 0);
setTimeout(function () { $border.css('margin', 'auto'); }, 0);
}
}
/**
* Do the complete update sequence: recalculate offsets, update the
* elements, and set the correct values of x1, y1, x2, and y2.
*
* @param resetKeyPress
* If set to <code>false</code>, this instance's keypress
* event handler is not activated
*/
function doUpdate(resetKeyPress) {
adjust();
update(resetKeyPress);
x1 = viewX(selection.x1); y1 = viewY(selection.y1);
x2 = viewX(selection.x2); y2 = viewY(selection.y2);
}
/**
* Hide or fade out an element (or multiple elements)
*
* @param $elem
* A jQuery object containing the element(s) to hide/fade out
* @param fn
* Callback function to be called when fadeOut() completes
*/
function hide($elem, fn) {
options.fadeSpeed ? $elem.fadeOut(options.fadeSpeed, fn) : $elem.hide();
}
/**
* Selection area mousemove event handler
*
* @param event
* The event object
*/
function areaMouseMove(event) {
var x = selX(evX(event)) - selection.x1,
y = selY(evY(event)) - selection.y1;
if (!adjusted) {
adjust();
adjusted = true;
$box.one('mouseout', function () { adjusted = false; });
}
/* Clear the resize mode */
resize = '';
if (options.resizable) {
/*
* Check if the mouse pointer is over the resize margin area and set
* the resize mode accordingly
*/
if (y <= options.resizeMargin)
resize = 'n';
else if (y >= selection.height - options.resizeMargin)
resize = 's';
if (x <= options.resizeMargin)
resize += 'w';
else if (x >= selection.width - options.resizeMargin)
resize += 'e';
}
$box.css('cursor', resize ? resize + '-resize' :
options.movable ? 'move' : '');
if ($areaOpera)
$areaOpera.toggle();
}
/**
* Document mouseup event handler
*
* @param event
* The event object
*/
function docMouseUp(event) {
/* Set back the default cursor */
$('body').css('cursor', '');
/*
* If autoHide is enabled, or if the selection has zero width/height,
* hide the selection and the outer area
*/
if (options.autoHide || selection.width * selection.height == 0)
hide($box.add($outer), function () { $(this).hide(); });
$(document).off('mousemove touchmove', selectingMouseMove);
$box.on('mousemove touchmove', areaMouseMove);
options.onSelectEnd(img, getSelection());
}
/**
* Selection area mousedown event handler
*
* @param event
* The event object
* @return false
*/
function areaMouseDown(event) {
if (event.type == 'mousedown' && event.which != 1) return false;
/*
* With mobile browsers, there is no "moving the pointer over" action,
* so we need to simulate one mousemove event happening prior to
* mousedown/touchstart.
*/
areaMouseMove(event);
adjust();
if (resize) {
/* Resize mode is in effect */
$('body').css('cursor', resize + '-resize');
x1 = viewX(selection[/w/.test(resize) ? 'x2' : 'x1']);
y1 = viewY(selection[/n/.test(resize) ? 'y2' : 'y1']);
$(document).on('mousemove touchmove', selectingMouseMove)
.one('mouseup touchend', docMouseUp);
$box.off('mousemove touchmove', areaMouseMove);
}
else if (options.movable) {
startX = left + selection.x1 - evX(event);
startY = top + selection.y1 - evY(event);
$box.off('mousemove touchmove', areaMouseMove);
$(document).on('mousemove touchmove', movingMouseMove)
.one('mouseup touchend', function () {
options.onSelectEnd(img, getSelection());
$(document).off('mousemove touchmove', movingMouseMove);
$box.on('mousemove touchmove', areaMouseMove);
});
}
else
$img.mousedown(event);
return false;
}
/**
* Adjust the x2/y2 coordinates to maintain aspect ratio (if defined)
*
* @param xFirst
* If set to <code>true</code>, calculate x2 first. Otherwise,
* calculate y2 first.
*/
function fixAspectRatio(xFirst) {
if (aspectRatio)
if (xFirst) {
x2 = max(left, min(left + imgWidth,
x1 + abs(y2 - y1) * aspectRatio * (x2 > x1 || -1)));
y2 = round(max(top, min(top + imgHeight,
y1 + abs(x2 - x1) / aspectRatio * (y2 > y1 || -1))));
x2 = round(x2);
}
else {
y2 = max(top, min(top + imgHeight,
y1 + abs(x2 - x1) / aspectRatio * (y2 > y1 || -1)));
x2 = round(max(left, min(left + imgWidth,
x1 + abs(y2 - y1) * aspectRatio * (x2 > x1 || -1))));
y2 = round(y2);
}
}
/**
* Resize the selection area respecting the minimum/maximum dimensions and
* aspect ratio
*/
function doResize() {
/*
* Make sure the top left corner of the selection area stays within
* image boundaries (it might not if the image source was dynamically
* changed).
*/
x1 = min(x1, left + imgWidth);
y1 = min(y1, top + imgHeight);
if (abs(x2 - x1) < minWidth) {
/* Selection width is smaller than minWidth */
x2 = x1 - minWidth * (x2 < x1 || -1);
if (x2 < left)
x1 = left + minWidth;
else if (x2 > left + imgWidth)
x1 = left + imgWidth - minWidth;
}
if (abs(y2 - y1) < minHeight) {
/* Selection height is smaller than minHeight */
y2 = y1 - minHeight * (y2 < y1 || -1);
if (y2 < top)
y1 = top + minHeight;
else if (y2 > top + imgHeight)
y1 = top + imgHeight - minHeight;
}
x2 = max(left, min(x2, left + imgWidth));
y2 = max(top, min(y2, top + imgHeight));
fixAspectRatio(abs(x2 - x1) < abs(y2 - y1) * aspectRatio);
if (abs(x2 - x1) > maxWidth) {
/* Selection width is greater than maxWidth */
x2 = x1 - maxWidth * (x2 < x1 || -1);
fixAspectRatio();
}
if (abs(y2 - y1) > maxHeight) {
/* Selection height is greater than maxHeight */
y2 = y1 - maxHeight * (y2 < y1 || -1);
fixAspectRatio(true);
}
selection = { x1: selX(min(x1, x2)), x2: selX(max(x1, x2)),
y1: selY(min(y1, y2)), y2: selY(max(y1, y2)),
width: abs(x2 - x1), height: abs(y2 - y1) };
update();
options.onSelectChange(img, getSelection());
}
/**
* Mousemove event handler triggered when the user is selecting an area
*
* @param event
* The event object
* @return false
*/
function selectingMouseMove(event) {
x2 = /w|e|^$/.test(resize) || aspectRatio ? evX(event) : viewX(selection.x2);
y2 = /n|s|^$/.test(resize) || aspectRatio ? evY(event) : viewY(selection.y2);
doResize();
return false;
}
/**
* Move the selection area
*
* @param newX1
* New viewport X1
* @param newY1
* New viewport Y1
*/
function doMove(newX1, newY1) {
x2 = (x1 = newX1) + selection.width;
y2 = (y1 = newY1) + selection.height;
$.extend(selection, { x1: selX(x1), y1: selY(y1), x2: selX(x2),
y2: selY(y2) });
update();
options.onSelectChange(img, getSelection());
}
/**
* Mousemove event handler triggered when the selection area is being moved
*
* @param event
* The event object
* @return false
*/
function movingMouseMove(event) {
x1 = max(left, min(startX + evX(event), left + imgWidth - selection.width));
y1 = max(top, min(startY + evY(event), top + imgHeight - selection.height));
doMove(x1, y1);
event.preventDefault();
return false;
}
/**
* Start selection
*/
function startSelection() {
$(document).off('mousemove touchmove', startSelection);
adjust();
x2 = x1;
y2 = y1;
doResize();
resize = '';
if (!$outer.is(':visible'))
/* Show the plugin elements */
$box.add($outer).hide().fadeIn(options.fadeSpeed||0);
shown = true;
$(document).off('mouseup touchend', cancelSelection)
.on('mousemove touchmove', selectingMouseMove)
.one('mouseup touchend', docMouseUp);
$box.off('mousemove touchmove', areaMouseMove);
options.onSelectStart(img, getSelection());
}
/**
* Cancel selection
*/
function cancelSelection() {
$(document).off('mousemove touchmove', startSelection)
.off('mouseup touchend', cancelSelection);
hide($box.add($outer));
setSelection(selX(x1), selY(y1), selX(x1), selY(y1));
/* If this is an API call, callback functions should not be triggered */
if (!(this instanceof $.imgAreaSelect)) {
options.onSelectChange(img, getSelection());
options.onSelectEnd(img, getSelection());
}
}
/**
* Image mousedown event handler
*
* @param event
* The event object
* @return false
*/
function imgMouseDown(event) {
/* Ignore the event if animation is in progress */
if (event.which > 1 || $outer.is(':animated')) return false;
adjust();
startX = x1 = evX(event);
startY = y1 = evY(event);
/* Selection will start when the mouse is moved */
$(document).on({ 'mousemove touchmove': startSelection,
'mouseup touchend': cancelSelection });
return false;
}
/**
* Window resize event handler
*/
function windowResize() {
doUpdate(false);
}
/**
* Image load event handler. This is the final part of the initialization
* process.
*/
function imgLoad() {
imgLoaded = true;
/* Set options */
setOptions(options = $.extend({
classPrefix: 'imgareaselect',
movable: true,
parent: 'body',
resizable: true,
resizeMargin: 10,
onInit: function () {},
onSelectStart: function () {},
onSelectChange: function () {},
onSelectEnd: function () {}
}, options));
$box.add($outer).css({ visibility: '' });
if (options.show) {
shown = true;
adjust();
update();
$box.add($outer).hide().fadeIn(options.fadeSpeed||0);
}
/*
* Call the onInit callback. The setTimeout() call is used to ensure
* that the plugin has been fully initialized and the object instance is
* available (so that it can be obtained in the callback).
*/
setTimeout(function () { options.onInit(img, getSelection()); }, 0);
}
/**
* Document keypress event handler
*
* @param event
* The event object
* @return false
*/
var docKeyPress = function(event) {
var k = options.keys, d, t, key = event.keyCode;
d = !isNaN(k.alt) && (event.altKey || event.originalEvent.altKey) ? k.alt :
!isNaN(k.ctrl) && event.ctrlKey ? k.ctrl :
!isNaN(k.shift) && event.shiftKey ? k.shift :
!isNaN(k.arrows) ? k.arrows : 10;
if (k.arrows == 'resize' || (k.shift == 'resize' && event.shiftKey) ||
(k.ctrl == 'resize' && event.ctrlKey) ||
(k.alt == 'resize' && (event.altKey || event.originalEvent.altKey)))
{
/* Resize selection */
switch (key) {
case 37:
/* Left */
d = -d;
case 39:
/* Right */
t = max(x1, x2);
x1 = min(x1, x2);
x2 = max(t + d, x1);
fixAspectRatio();
break;
case 38:
/* Up */
d = -d;
case 40:
/* Down */
t = max(y1, y2);
y1 = min(y1, y2);
y2 = max(t + d, y1);
fixAspectRatio(true);
break;
default:
return;
}
doResize();
}
else {
/* Move selection */
x1 = min(x1, x2);
y1 = min(y1, y2);
switch (key) {
case 37:
/* Left */
doMove(max(x1 - d, left), y1);
break;
case 38:
/* Up */
doMove(x1, max(y1 - d, top));
break;
case 39:
/* Right */
doMove(x1 + min(d, imgWidth - selX(x2)), y1);
break;
case 40:
/* Down */
doMove(x1, y1 + min(d, imgHeight - selY(y2)));
break;
default:
return;
}
}
return false;
};
/**
* Apply style options to plugin element (or multiple elements)
*
* @param $elem
* A jQuery object representing the element(s) to style
* @param props
* An object that maps option names to corresponding CSS
* properties
*/
function styleOptions($elem, props) {
for (var option in props)
if (options[option] !== undefined)
$elem.css(props[option], options[option]);
}
/**
* Set plugin options
*
* @param newOptions
* The new options object
*/
function setOptions(newOptions) {
if (newOptions.parent)
($parent = $(newOptions.parent)).append($box.add($outer));
/* Merge the new options with the existing ones */
$.extend(options, newOptions);
adjust();
if (newOptions.handles != null) {
/* Recreate selection area handles */
$handles.remove();
$handles = $([]);
i = newOptions.handles ? newOptions.handles == 'corners' ? 4 : 8 : 0;
while (i--)
$handles = $handles.add(div());
/* Add a class to handles and set the CSS properties */
$handles.addClass(options.classPrefix + '-handle').css({
position: 'absolute',
/*
* The font-size property needs to be set to zero, otherwise
* Internet Explorer makes the handles too large
*/
fontSize: 0,
zIndex: zIndex + 1 || 1
});
/*
* If handle width/height has not been set with CSS rules, set the
* default 5px
*/
if (!parseInt($handles.css('width')) >= 0)
$handles.width(5).height(5);
/*
* If the borderWidth option is in use, add a solid border to
* handles
*/
if (o = options.borderWidth)
$handles.css({ borderWidth: o, borderStyle: 'solid' });
/* Apply other style options */
styleOptions($handles, { borderColor1: 'border-color',
borderColor2: 'background-color',
borderOpacity: 'opacity' });
}
/* Calculate scale factors */
scaleX = options.imageWidth / imgWidth || 1;
scaleY = options.imageHeight / imgHeight || 1;
/* Set selection */
if (newOptions.x1 != null) {
setSelection(newOptions.x1, newOptions.y1, newOptions.x2,
newOptions.y2);
newOptions.show = !newOptions.hide;
}
if (newOptions.keys)
/* Enable keyboard support */
options.keys = $.extend({ shift: 1, ctrl: 'resize' },
newOptions.keys);
/* Add classes to plugin elements */
$outer.addClass(options.classPrefix + '-outer');
$area.addClass(options.classPrefix + '-selection');
for (i = 0; i++ < 4;)
$($border[i-1]).addClass(options.classPrefix + '-border' + i);
/* Apply style options */
styleOptions($area, { selectionColor: 'background-color',
selectionOpacity: 'opacity' });
styleOptions($border, { borderOpacity: 'opacity',
borderWidth: 'border-width' });
styleOptions($outer, { outerColor: 'background-color',
outerOpacity: 'opacity' });
if (o = options.borderColor1)
$($border[0]).css({ borderStyle: 'solid', borderColor: o });
if (o = options.borderColor2)
$($border[1]).css({ borderStyle: 'dashed', borderColor: o });
/* Append all the selection area elements to the container box */
$box.append($area.add($border).add($areaOpera)).append($handles);
if (msie) {
if (o = ($outer.css('filter')||'').match(/opacity=(\d+)/))
$outer.css('opacity', o[1]/100);
if (o = ($border.css('filter')||'').match(/opacity=(\d+)/))
$border.css('opacity', o[1]/100);
}
if (newOptions.hide)
hide($box.add($outer));
else if (newOptions.show && imgLoaded) {
shown = true;
$box.add($outer).fadeIn(options.fadeSpeed||0);
doUpdate();
}
/* Calculate the aspect ratio factor */
aspectRatio = (d = (options.aspectRatio || '').split(/:/))[0] / d[1];
$img.add($outer).unbind('mousedown', imgMouseDown);
if (options.disable || options.enable === false) {
/* Disable the plugin */
$box.off({ 'mousemove touchmove': areaMouseMove,
'mousedown touchstart': areaMouseDown });
$(window).off('resize', windowResize);
}
else {
if (options.enable || options.disable === false) {
/* Enable the plugin */
if (options.resizable || options.movable)
$box.on({ 'mousemove touchmove': areaMouseMove,
'mousedown touchstart': areaMouseDown });
$(window).resize(windowResize);
}
if (!options.persistent)
$img.add($outer).on('mousedown touchstart', imgMouseDown);
}
options.enable = options.disable = undefined;
}
/**
* Remove plugin completely
*/
this.remove = function () {
/*
* Call setOptions with { disable: true } to unbind the event handlers
*/
setOptions({ disable: true });
$box.add($outer).remove();
};
/*
* Public API
*/
/**
* Get current options
*
* @return An object containing the set of options currently in use
*/
this.getOptions = function () { return options; };
/**
* Set plugin options
*
* @param newOptions
* The new options object
*/
this.setOptions = setOptions;
/**
* Get the current selection
*
* @param noScale
* If set to <code>true</code>, scaling is not applied to the
* returned selection
* @return Selection object
*/
this.getSelection = getSelection;
/**
* Set the current selection
*
* @param x1
* X coordinate of the upper left corner of the selection area
* @param y1
* Y coordinate of the upper left corner of the selection area
* @param x2
* X coordinate of the lower right corner of the selection area
* @param y2
* Y coordinate of the lower right corner of the selection area
* @param noScale
* If set to <code>true</code>, scaling is not applied to the
* new selection
*/
this.setSelection = setSelection;
/**
* Cancel selection
*/
this.cancelSelection = cancelSelection;
/**
* Update plugin elements
*
* @param resetKeyPress
* If set to <code>false</code>, this instance's keypress
* event handler is not activated
*/
this.update = doUpdate;
/* Do the dreaded browser detection */
var msie = (/msie ([\w.]+)/i.exec(ua)||[])[1],
opera = /opera/i.test(ua),
safari = /webkit/i.test(ua) && !/chrome/i.test(ua);
/*
* Traverse the image's parent elements (up to <body>) and find the
* highest z-index
*/
$p = $img;
while ($p.length) {
zIndex = max(zIndex,
!isNaN($p.css('z-index')) ? $p.css('z-index') : zIndex);
/* Also check if any of the ancestor elements has fixed position */
if ($p.css('position') == 'fixed')
position = 'fixed';
$p = $p.parent(':not(body)');
}
/*
* If z-index is given as an option, it overrides the one found by the
* above loop
*/
zIndex = options.zIndex || zIndex;
if (msie)
$img.attr('unselectable', 'on');
/*
* In MSIE and WebKit, we need to use the keydown event instead of keypress
*/
$.imgAreaSelect.keyPress = msie || safari ? 'keydown' : 'keypress';
/*
* There is a bug affecting the CSS cursor property in Opera (observed in
* versions up to 10.00) that prevents the cursor from being updated unless
* the mouse leaves and enters the element again. To trigger the mouseover
* event, we're adding an additional div to $box and we're going to toggle
* it when mouse moves inside the selection area.
*/
if (opera)
$areaOpera = div().css({ width: '100%', height: '100%',
position: 'absolute', zIndex: zIndex + 2 || 2 });
/*
* We initially set visibility to "hidden" as a workaround for a weird
* behaviour observed in Google Chrome 1.0.154.53 (on Windows XP). Normally
* we would just set display to "none", but, for some reason, if we do so
* then Chrome refuses to later display the element with .show() or
* .fadeIn().
*/
$box.add($outer).css({ visibility: 'hidden', position: position,
overflow: 'hidden', zIndex: zIndex || '0' });
$box.css({ zIndex: zIndex + 2 || 2 });
$area.add($border).css({ position: 'absolute', fontSize: 0 });
/*
* If the image has been fully loaded, or if it is not really an image (eg.
* a div), call imgLoad() immediately; otherwise, bind it to be called once
* on image load event.
*/
img.complete || img.readyState == 'complete' || !$img.is('img') ?
imgLoad() : $img.one('load', imgLoad);
/*
* MSIE 9.0 doesn't always fire the image load event -- resetting the src
* attribute seems to trigger it. The check is for version 7 and above to
* accommodate for MSIE 9 running in compatibility mode.
*/
if (!imgLoaded && msie && msie >= 7)
img.src = img.src;
};
/**
* Invoke imgAreaSelect on a jQuery object containing the image(s)
*
* @param options
* Options object
* @return The jQuery object or a reference to imgAreaSelect instance (if the
* <code>instance</code> option was specified)
*/
$.fn.imgAreaSelect = function (options) {
options = options || {};
this.each(function () {
/* Is there already an imgAreaSelect instance bound to this element? */
if ($(this).data('imgAreaSelect')) {
/* Yes there is -- is it supposed to be removed? */
if (options.remove) {
/* Remove the plugin */
$(this).data('imgAreaSelect').remove();
$(this).removeData('imgAreaSelect');
}
else
/* Reset options */
$(this).data('imgAreaSelect').setOptions(options);
}
else if (!options.remove) {
/* No exising instance -- create a new one */
/*
* If neither the "enable" nor the "disable" option is present, add
* "enable" as the default
*/
if (options.enable === undefined && options.disable === undefined)
options.enable = true;
$(this).data('imgAreaSelect', new $.imgAreaSelect(this, options));
}
});
if (options.instance)
/*
* Return the imgAreaSelect instance bound to the first element in the
* set
*/
return $(this).data('imgAreaSelect');
return this;
};
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