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/* * imgAreaSelect jQuery plugin * version 0.9.10-wp-6.2 * * 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, floor = Math.floor; /* * 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: floor(selection.x1 sx), y1: floor(selection.y1 * sy), x2: floor(selection.x2 * sx), y2: floor(selection.y2 * sy), width: floor(selection.x2 * sx) - floor(selection.x1 * sx), height: floor(selection.y2 * sy) - floor(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: floor(x1 / sx \|\| 0), y1: floor(y1 / sy \|\| 0), x2: floor(x2 / sx \|\| 0), y2: floor(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: floor($img.offset().left), top: floor($img.offset().top) }; / Get image dimensions / imgWidth = $img.innerWidth(); imgHeight = $img.innerHeight(); imgOfs.top += ($img.outerHeight() - imgHeight) >> 1; imgOfs.left += ($img.outerWidth() - imgWidth) >> 1; / Set minimum and maximum selection area dimensions / minWidth = floor(options.minWidth / scaleX) \|\| 0; minHeight = floor(options.minHeight / scaleY) \|\| 0; maxWidth = floor(min(options.maxWidth / scaleX \|\| 1<<24, imgWidth)); maxHeight = floor(min(options.maxHeight / scaleY \|\| 1<<24, imgHeight)); / * Workaround for jQuery 1.3.2 incorrect offset calculation, originally * observed in Safari 3. Firefox 2 is also affected. / if ($().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($parent.css('position')) ? { left: floor($parent.offset().left) - $parent.scrollLeft(), top: floor($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) $(document).off($.imgAreaSelect.keyPress, $.imgAreaSelect.onKeyPress); if (options.keys) / * Set the document keypress event handler to this instance's * docKeyPress() function / $(document).on( $.imgAreaSelect.keyPress, function() { $.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); updateSelectionRelativeToParentElement(); } /* * Set the correct values of x1, y1, x2, and y2. / function updateSelectionRelativeToParentElement() { 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 = floor(max(top, min(top + imgHeight, y1 + abs(x2 - x1) / aspectRatio * (y2 > y1 \|\| -1)))); x2 = floor(x2); } else { y2 = max(top, min(top + imgHeight, y1 + abs(x2 - x1) / aspectRatio * (y2 > y1 \|\| -1))); x2 = floor(max(left, min(left + imgWidth, x1 + abs(y2 - y1) * aspectRatio * (x2 > x1 \|\| -1)))); y2 = floor(y2); } } /** * Resize the selection area respecting the minimum/maximum dimensions and * aspect ratio / function doResize() { / * Make sure x1, x2, y1, y2 are initialized to avoid the following calculation * getting incorrect results. / if ( x1 == null \|\| x2 == null \|\| y1 == null \|\| y2 == null ) { updateSelectionRelativeToParentElement(); } / * 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(10).height(10); / * 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).off('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).on( '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). 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