/*
* imgAreaSelect jQuery plugin
- * version 0.9.6
+ * version 0.9.8
*
* Copyright (c) 2008-2011 Michal Wojciechowski (odyniec.net)
*
(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,
- resizeMargin = 10,
-
+ /* 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,
+ /* 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 event.pageX - parOfs.left;
}
+ /**
+ * Get event Y and translate it to viewport Y
+ *
+ * @param event
+ * The event object
+ * @return Viewport Y
+ */
function evY(event) {
return event.pageY - parOfs.top;
}
+ /**
+ * 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;
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.height = selection.y2 - selection.y1;
}
+ /**
+ * Recalculate image and parent offsets
+ */
function adjust() {
+ /*
+ * Do not adjust if image width is not a positive number. This might
+ * happen when imgAreaSelect is put on a parent element which is then
+ * hidden.
+ */
if (!$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 += ($img.outerWidth() - imgWidth) >> 1;
- minWidth = options.minWidth || 0;
- minHeight = options.minHeight || 0;
- maxWidth = min(options.maxWidth || 1<<24, imgWidth);
- maxHeight = min(options.maxHeight || 1<<24, imgHeight);
+ /* Set minimum and maximum selection area dimensions */
+ minWidth = round(options.minWidth / scaleX) || 0;
+ minHeight = round(options.minHeight / scaleY) || 0;
+ maxWidth = round(min(options.maxWidth / scaleX || 1<<24, imgWidth));
+ maxHeight = round(min(options.maxHeight / scaleY || 1<<24, imgHeight));
+ /*
+ * Workaround for jQuery 1.3.2 incorrect offset calculation, originally
+ * observed in Safari 3. Firefox 2 is also affected.
+ */
if ($().jquery == '1.3.2' && position == 'fixed' &&
!docElem['getBoundingClientRect'])
{
imgOfs.left += max(document.body.scrollLeft, docElem.scrollLeft);
}
- parOfs = $.inArray($parent.css('position'), ['absolute', 'relative']) + 1 ?
+ /* 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 = 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,
w -= $handles.outerWidth();
h -= $handles.outerHeight();
+ /* Arrange handles */
switch ($handles.length) {
case 8:
$($handles[4]).css({ left: w >> 1 });
}
if (resetKeyPress !== false) {
+ /*
+ * Need to reset the document keypress event handler -- unbind the
+ * current handler
+ */
if ($.imgAreaSelect.keyPress != 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](
$.imgAreaSelect.onKeyPress = docKeyPress);
}
+ /*
+ * Internet Explorer displays 1px-wide dashed borders incorrectly by
+ * filling the spaces between dashes with white. Toggling the margin
+ * property between 0 and "auto" fixes this in IE6 and IE7 (IE8 is still
+ * broken). This workaround is not perfect, as it requires setTimeout()
+ * and thus causes the border to flicker a bit, but I haven't found a
+ * better solution.
+ *
+ * Note: This only happens with CSS borders, set with the borderWidth,
+ * borderOpacity, borderColor1, and borderColor2 options (which are now
+ * deprecated). Borders created with GIF background images are fine.
+ */
if ($.browser.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);
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;
$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)
$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(); });
options.onSelectEnd(img, getSelection());
}
+ /**
+ * Selection area mousedown event handler
+ *
+ * @param event
+ * The event object
+ * @return false
+ */
function areaMouseDown(event) {
if (event.which != 1) return false;
adjust();
if (resize) {
+ /* Resize mode is in effect */
$('body').css('cursor', resize + '-resize');
x1 = viewX(selection[/w/.test(resize) ? 'x2' : 'x1']);
return false;
}
+ /**
+ * Adjust the x2/y2 coordinates to maintain aspect ratio (if defined)
+ *
+ * @param xFirst
+ * If set to <code>true</code>, calculate x2 first. Otherwise,
+ * calculate y2 first.
+ */
function fixAspectRatio(xFirst) {
if (aspectRatio)
if (xFirst) {
x2 = max(left, min(left + imgWidth,
x1 + abs(y2 - y1) * aspectRatio * (x2 > x1 || -1)));
-
y2 = round(max(top, min(top + imgHeight,
y1 + abs(x2 - x1) / aspectRatio * (y2 > y1 || -1))));
x2 = round(x2);
}
}
+ /**
+ * Resize the selection area respecting the minimum/maximum dimensions and
+ * aspect ratio
+ */
function doResize() {
+ /*
+ * Make sure the top left corner of the selection area stays within
+ * image boundaries (it might not if the image source was dynamically
+ * changed).
+ */
x1 = min(x1, left + imgWidth);
y1 = min(y1, top + imgHeight);
if (abs(x2 - x1) < minWidth) {
+ /* Selection width is smaller than minWidth */
x2 = x1 - minWidth * (x2 < x1 || -1);
if (x2 < left)
}
if (abs(y2 - y1) < minHeight) {
+ /* Selection height is smaller than minHeight */
y2 = y1 - minHeight * (y2 < y1 || -1);
if (y2 < top)
fixAspectRatio(abs(x2 - x1) < abs(y2 - y1) * aspectRatio);
if (abs(x2 - x1) > maxWidth) {
+ /* Selection width is greater than maxWidth */
x2 = x1 - maxWidth * (x2 < x1 || -1);
fixAspectRatio();
}
if (abs(y2 - y1) > maxHeight) {
+ /* Selection height is greater than maxHeight */
y2 = y1 - maxHeight * (y2 < y1 || -1);
fixAspectRatio(true);
}
options.onSelectChange(img, getSelection());
}
+ /**
+ * Mousemove event handler triggered when the user is selecting an area
+ *
+ * @param event
+ * The event object
+ * @return false
+ */
function selectingMouseMove(event) {
- x2 = resize == '' || /w|e/.test(resize) || aspectRatio ? evX(event) : viewX(selection.x2);
- y2 = resize == '' || /n|s/.test(resize) || aspectRatio ? evY(event) : viewY(selection.y2);
+ x2 = /w|e|^$/.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;
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() {
$(document).unbind('mousemove', startSelection);
adjust();
x2 = x1;
y2 = y1;
-
doResize();
resize = '';
- if ($outer.is(':not(:visible)'))
+ if (!$outer.is(':visible'))
+ /* Show the plugin elements */
$box.add($outer).hide().fadeIn(options.fadeSpeed||0);
shown = true;
options.onSelectStart(img, getSelection());
}
+ /**
+ * Cancel selection
+ */
function cancelSelection() {
$(document).unbind('mousemove', startSelection)
.unbind('mouseup', cancelSelection);
setSelection(selX(x1), selY(y1), selX(x1), selY(y1));
- options.onSelectChange(img, getSelection());
- options.onSelectEnd(img, getSelection());
+ /* 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).mousemove(startSelection).mouseup(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,
$box.add($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;
(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);
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 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 (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 = $([]);
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);
}
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',
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).add($handles));
if ($.browser.msie) {
- if (o = $outer.css('filter').match(/opacity=([0-9]+)/))
+ if (o = $outer.css('filter').match(/opacity=(\d+)/))
$outer.css('opacity', o[1]/100);
- if (o = $border.css('filter').match(/opacity=([0-9]+)/))
+ if (o = $border.css('filter').match(/opacity=(\d+)/))
$border.css('opacity', o[1]/100);
}
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.unbind('mousemove', areaMouseMove).unbind('mousedown', areaMouseDown);
$(window).unbind('resize', windowResize);
}
else {
if (options.enable || options.disable === false) {
+ /* Enable the plugin */
if (options.resizable || options.movable)
$box.mousemove(areaMouseMove).mousedown(areaMouseDown);
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;
+ /*
+ * 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 = $p.parent(':not(body)');
}
+ /*
+ * If z-index is given as an option, it overrides the one found by the
+ * above loop
+ */
zIndex = options.zIndex || zIndex;
if ($.browser.msie)
$img.attr('unselectable', 'on');
+ /*
+ * In MSIE and WebKit, we need to use the keydown event instead of keypress
+ */
$.imgAreaSelect.keyPress = $.browser.msie ||
$.browser.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 $box and we're going to toggle
+ * it when mouse moves inside the selection area.
+ */
if ($.browser.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() : $img.one('load', imgLoad);
- if ($.browser.msie && $.browser.version >= 9)
+ /*
+ * MSIE 9.0 doesn't always fire the image load event -- resetting the src
+ * attribute seems to trigger it. The check is for version 7 and above to
+ * accommodate for MSIE 9 running in compatibility mode.
+ */
+ if ($.browser.msie && $.browser.version >= 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;
});
if (options.instance)
+ /*
+ * Return the imgAreaSelect instance bound to the first element in the
+ * set
+ */
return $(this).data('imgAreaSelect');
return this;
scripts.mit.edu / autoinstalls / wordpress.git / blobdiff