03e09e6063
git-svn-id: https://develop.svn.wordpress.org/trunk@17934 602fd350-edb4-49c9-b593-d223f7449a82
723 lines
21 KiB
JavaScript
723 lines
21 KiB
JavaScript
/*
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* imgAreaSelect jQuery plugin
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* version 0.9.6
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*
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* Copyright (c) 2008-2011 Michal Wojciechowski (odyniec.net)
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*
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* Dual licensed under the MIT (MIT-LICENSE.txt)
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* and GPL (GPL-LICENSE.txt) licenses.
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*
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* http://odyniec.net/projects/imgareaselect/
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*
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*/
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(function($) {
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var abs = Math.abs,
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max = Math.max,
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min = Math.min,
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round = Math.round;
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function div() {
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return $('<div/>');
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}
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$.imgAreaSelect = function (img, options) {
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var
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$img = $(img),
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imgLoaded,
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$box = div(),
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$area = div(),
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$border = div().add(div()).add(div()).add(div()),
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$outer = div().add(div()).add(div()).add(div()),
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$handles = $([]),
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$areaOpera,
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left, top,
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imgOfs = { left: 0, top: 0 },
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imgWidth, imgHeight,
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$parent,
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parOfs = { left: 0, top: 0 },
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zIndex = 0,
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position = 'absolute',
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startX, startY,
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scaleX, scaleY,
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resizeMargin = 10,
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resize,
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minWidth, minHeight, maxWidth, maxHeight,
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aspectRatio,
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shown,
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x1, y1, x2, y2,
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selection = { x1: 0, y1: 0, x2: 0, y2: 0, width: 0, height: 0 },
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docElem = document.documentElement,
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$p, d, i, o, w, h, adjusted;
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function viewX(x) {
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return x + imgOfs.left - parOfs.left;
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}
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function viewY(y) {
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return y + imgOfs.top - parOfs.top;
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}
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function selX(x) {
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return x - imgOfs.left + parOfs.left;
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}
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function selY(y) {
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return y - imgOfs.top + parOfs.top;
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}
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function evX(event) {
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return event.pageX - parOfs.left;
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}
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function evY(event) {
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return event.pageY - parOfs.top;
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}
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function getSelection(noScale) {
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var sx = noScale || scaleX, sy = noScale || scaleY;
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return { x1: round(selection.x1 * sx),
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y1: round(selection.y1 * sy),
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x2: round(selection.x2 * sx),
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y2: round(selection.y2 * sy),
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width: round(selection.x2 * sx) - round(selection.x1 * sx),
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height: round(selection.y2 * sy) - round(selection.y1 * sy) };
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}
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function setSelection(x1, y1, x2, y2, noScale) {
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var sx = noScale || scaleX, sy = noScale || scaleY;
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selection = {
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x1: round(x1 / sx || 0),
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y1: round(y1 / sy || 0),
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x2: round(x2 / sx || 0),
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y2: round(y2 / sy || 0)
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};
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selection.width = selection.x2 - selection.x1;
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selection.height = selection.y2 - selection.y1;
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}
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function adjust() {
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if (!$img.width())
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return;
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imgOfs = { left: round($img.offset().left), top: round($img.offset().top) };
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imgWidth = $img.innerWidth();
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imgHeight = $img.innerHeight();
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imgOfs.top += ($img.outerHeight() - imgHeight) >> 1;
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imgOfs.left += ($img.outerWidth() - imgWidth) >> 1;
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minWidth = options.minWidth || 0;
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minHeight = options.minHeight || 0;
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maxWidth = min(options.maxWidth || 1<<24, imgWidth);
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maxHeight = min(options.maxHeight || 1<<24, imgHeight);
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if ($().jquery == '1.3.2' && position == 'fixed' &&
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!docElem['getBoundingClientRect'])
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{
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imgOfs.top += max(document.body.scrollTop, docElem.scrollTop);
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imgOfs.left += max(document.body.scrollLeft, docElem.scrollLeft);
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}
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parOfs = $.inArray($parent.css('position'), ['absolute', 'relative']) + 1 ?
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{ left: round($parent.offset().left) - $parent.scrollLeft(),
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top: round($parent.offset().top) - $parent.scrollTop() } :
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position == 'fixed' ?
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{ left: $(document).scrollLeft(), top: $(document).scrollTop() } :
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{ left: 0, top: 0 };
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left = viewX(0);
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top = viewY(0);
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if (selection.x2 > imgWidth || selection.y2 > imgHeight)
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doResize();
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}
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function update(resetKeyPress) {
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if (!shown) return;
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$box.css({ left: viewX(selection.x1), top: viewY(selection.y1) })
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.add($area).width(w = selection.width).height(h = selection.height);
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$area.add($border).add($handles).css({ left: 0, top: 0 });
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$border
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.width(max(w - $border.outerWidth() + $border.innerWidth(), 0))
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.height(max(h - $border.outerHeight() + $border.innerHeight(), 0));
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$($outer[0]).css({ left: left, top: top,
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width: selection.x1, height: imgHeight });
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$($outer[1]).css({ left: left + selection.x1, top: top,
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width: w, height: selection.y1 });
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$($outer[2]).css({ left: left + selection.x2, top: top,
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width: imgWidth - selection.x2, height: imgHeight });
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$($outer[3]).css({ left: left + selection.x1, top: top + selection.y2,
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width: w, height: imgHeight - selection.y2 });
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w -= $handles.outerWidth();
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h -= $handles.outerHeight();
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switch ($handles.length) {
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case 8:
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$($handles[4]).css({ left: w >> 1 });
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$($handles[5]).css({ left: w, top: h >> 1 });
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$($handles[6]).css({ left: w >> 1, top: h });
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$($handles[7]).css({ top: h >> 1 });
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case 4:
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$handles.slice(1,3).css({ left: w });
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$handles.slice(2,4).css({ top: h });
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}
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if (resetKeyPress !== false) {
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if ($.imgAreaSelect.keyPress != docKeyPress)
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$(document).unbind($.imgAreaSelect.keyPress,
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$.imgAreaSelect.onKeyPress);
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if (options.keys)
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$(document)[$.imgAreaSelect.keyPress](
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$.imgAreaSelect.onKeyPress = docKeyPress);
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}
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if ($.browser.msie && $border.outerWidth() - $border.innerWidth() == 2) {
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$border.css('margin', 0);
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setTimeout(function () { $border.css('margin', 'auto'); }, 0);
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}
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}
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function doUpdate(resetKeyPress) {
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adjust();
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update(resetKeyPress);
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x1 = viewX(selection.x1); y1 = viewY(selection.y1);
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x2 = viewX(selection.x2); y2 = viewY(selection.y2);
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}
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function hide($elem, fn) {
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options.fadeSpeed ? $elem.fadeOut(options.fadeSpeed, fn) : $elem.hide();
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}
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function areaMouseMove(event) {
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var x = selX(evX(event)) - selection.x1,
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y = selY(evY(event)) - selection.y1;
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if (!adjusted) {
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adjust();
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adjusted = true;
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$box.one('mouseout', function () { adjusted = false; });
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}
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resize = '';
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if (options.resizable) {
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if (y <= options.resizeMargin)
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resize = 'n';
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else if (y >= selection.height - options.resizeMargin)
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resize = 's';
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if (x <= options.resizeMargin)
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resize += 'w';
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else if (x >= selection.width - options.resizeMargin)
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resize += 'e';
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}
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$box.css('cursor', resize ? resize + '-resize' :
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options.movable ? 'move' : '');
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if ($areaOpera)
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$areaOpera.toggle();
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}
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function docMouseUp(event) {
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$('body').css('cursor', '');
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if (options.autoHide || selection.width * selection.height == 0)
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hide($box.add($outer), function () { $(this).hide(); });
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$(document).unbind('mousemove', selectingMouseMove);
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$box.mousemove(areaMouseMove);
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options.onSelectEnd(img, getSelection());
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}
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function areaMouseDown(event) {
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if (event.which != 1) return false;
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adjust();
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if (resize) {
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$('body').css('cursor', resize + '-resize');
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x1 = viewX(selection[/w/.test(resize) ? 'x2' : 'x1']);
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y1 = viewY(selection[/n/.test(resize) ? 'y2' : 'y1']);
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$(document).mousemove(selectingMouseMove)
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.one('mouseup', docMouseUp);
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$box.unbind('mousemove', areaMouseMove);
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}
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else if (options.movable) {
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startX = left + selection.x1 - evX(event);
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startY = top + selection.y1 - evY(event);
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$box.unbind('mousemove', areaMouseMove);
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$(document).mousemove(movingMouseMove)
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.one('mouseup', function () {
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options.onSelectEnd(img, getSelection());
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$(document).unbind('mousemove', movingMouseMove);
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$box.mousemove(areaMouseMove);
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});
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}
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else
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$img.mousedown(event);
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return false;
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}
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function fixAspectRatio(xFirst) {
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if (aspectRatio)
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if (xFirst) {
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x2 = max(left, min(left + imgWidth,
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x1 + abs(y2 - y1) * aspectRatio * (x2 > x1 || -1)));
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y2 = round(max(top, min(top + imgHeight,
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y1 + abs(x2 - x1) / aspectRatio * (y2 > y1 || -1))));
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x2 = round(x2);
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}
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else {
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y2 = max(top, min(top + imgHeight,
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y1 + abs(x2 - x1) / aspectRatio * (y2 > y1 || -1)));
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x2 = round(max(left, min(left + imgWidth,
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x1 + abs(y2 - y1) * aspectRatio * (x2 > x1 || -1))));
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y2 = round(y2);
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}
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}
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function doResize() {
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x1 = min(x1, left + imgWidth);
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y1 = min(y1, top + imgHeight);
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if (abs(x2 - x1) < minWidth) {
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x2 = x1 - minWidth * (x2 < x1 || -1);
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if (x2 < left)
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x1 = left + minWidth;
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else if (x2 > left + imgWidth)
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x1 = left + imgWidth - minWidth;
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}
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if (abs(y2 - y1) < minHeight) {
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y2 = y1 - minHeight * (y2 < y1 || -1);
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if (y2 < top)
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y1 = top + minHeight;
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else if (y2 > top + imgHeight)
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y1 = top + imgHeight - minHeight;
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}
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x2 = max(left, min(x2, left + imgWidth));
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y2 = max(top, min(y2, top + imgHeight));
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fixAspectRatio(abs(x2 - x1) < abs(y2 - y1) * aspectRatio);
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if (abs(x2 - x1) > maxWidth) {
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x2 = x1 - maxWidth * (x2 < x1 || -1);
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fixAspectRatio();
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}
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if (abs(y2 - y1) > maxHeight) {
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y2 = y1 - maxHeight * (y2 < y1 || -1);
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fixAspectRatio(true);
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}
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selection = { x1: selX(min(x1, x2)), x2: selX(max(x1, x2)),
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y1: selY(min(y1, y2)), y2: selY(max(y1, y2)),
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width: abs(x2 - x1), height: abs(y2 - y1) };
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update();
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options.onSelectChange(img, getSelection());
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}
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function selectingMouseMove(event) {
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x2 = resize == '' || /w|e/.test(resize) || aspectRatio ? evX(event) : viewX(selection.x2);
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y2 = resize == '' || /n|s/.test(resize) || aspectRatio ? evY(event) : viewY(selection.y2);
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doResize();
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return false;
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}
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function doMove(newX1, newY1) {
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x2 = (x1 = newX1) + selection.width;
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y2 = (y1 = newY1) + selection.height;
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$.extend(selection, { x1: selX(x1), y1: selY(y1), x2: selX(x2),
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y2: selY(y2) });
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update();
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options.onSelectChange(img, getSelection());
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}
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function movingMouseMove(event) {
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x1 = max(left, min(startX + evX(event), left + imgWidth - selection.width));
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y1 = max(top, min(startY + evY(event), top + imgHeight - selection.height));
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doMove(x1, y1);
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event.preventDefault();
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return false;
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}
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function startSelection() {
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$(document).unbind('mousemove', startSelection);
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adjust();
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x2 = x1;
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y2 = y1;
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doResize();
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resize = '';
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if ($outer.is(':not(:visible)'))
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$box.add($outer).hide().fadeIn(options.fadeSpeed||0);
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shown = true;
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$(document).unbind('mouseup', cancelSelection)
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.mousemove(selectingMouseMove).one('mouseup', docMouseUp);
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$box.unbind('mousemove', areaMouseMove);
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options.onSelectStart(img, getSelection());
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}
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function cancelSelection() {
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$(document).unbind('mousemove', startSelection)
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.unbind('mouseup', cancelSelection);
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hide($box.add($outer));
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setSelection(selX(x1), selY(y1), selX(x1), selY(y1));
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options.onSelectChange(img, getSelection());
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options.onSelectEnd(img, getSelection());
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}
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function imgMouseDown(event) {
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if (event.which != 1 || $outer.is(':animated')) return false;
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adjust();
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startX = x1 = evX(event);
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startY = y1 = evY(event);
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$(document).mousemove(startSelection).mouseup(cancelSelection);
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return false;
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}
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function windowResize() {
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doUpdate(false);
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}
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function imgLoad() {
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imgLoaded = true;
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setOptions(options = $.extend({
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classPrefix: 'imgareaselect',
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movable: true,
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parent: 'body',
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resizable: true,
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resizeMargin: 10,
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onInit: function () {},
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onSelectStart: function () {},
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onSelectChange: function () {},
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onSelectEnd: function () {}
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}, options));
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$box.add($outer).css({ visibility: '' });
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if (options.show) {
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shown = true;
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adjust();
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update();
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$box.add($outer).hide().fadeIn(options.fadeSpeed||0);
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}
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setTimeout(function () { options.onInit(img, getSelection()); }, 0);
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}
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var docKeyPress = function(event) {
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var k = options.keys, d, t, key = event.keyCode;
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d = !isNaN(k.alt) && (event.altKey || event.originalEvent.altKey) ? k.alt :
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!isNaN(k.ctrl) && event.ctrlKey ? k.ctrl :
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!isNaN(k.shift) && event.shiftKey ? k.shift :
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!isNaN(k.arrows) ? k.arrows : 10;
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if (k.arrows == 'resize' || (k.shift == 'resize' && event.shiftKey) ||
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(k.ctrl == 'resize' && event.ctrlKey) ||
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(k.alt == 'resize' && (event.altKey || event.originalEvent.altKey)))
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{
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switch (key) {
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case 37:
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d = -d;
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case 39:
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t = max(x1, x2);
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x1 = min(x1, x2);
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x2 = max(t + d, x1);
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fixAspectRatio();
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break;
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case 38:
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d = -d;
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case 40:
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t = max(y1, y2);
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y1 = min(y1, y2);
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y2 = max(t + d, y1);
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fixAspectRatio(true);
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break;
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default:
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return;
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}
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doResize();
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}
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else {
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x1 = min(x1, x2);
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y1 = min(y1, y2);
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switch (key) {
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case 37:
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doMove(max(x1 - d, left), y1);
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break;
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case 38:
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doMove(x1, max(y1 - d, top));
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break;
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case 39:
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doMove(x1 + min(d, imgWidth - selX(x2)), y1);
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break;
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case 40:
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doMove(x1, y1 + min(d, imgHeight - selY(y2)));
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break;
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default:
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return;
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}
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}
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return false;
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};
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function styleOptions($elem, props) {
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for (option in props)
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if (options[option] !== undefined)
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$elem.css(props[option], options[option]);
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}
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function setOptions(newOptions) {
|
|
if (newOptions.parent)
|
|
($parent = $(newOptions.parent)).append($box.add($outer));
|
|
|
|
$.extend(options, newOptions);
|
|
|
|
adjust();
|
|
|
|
if (newOptions.handles != null) {
|
|
$handles.remove();
|
|
$handles = $([]);
|
|
|
|
i = newOptions.handles ? newOptions.handles == 'corners' ? 4 : 8 : 0;
|
|
|
|
while (i--)
|
|
$handles = $handles.add(div());
|
|
|
|
$handles.addClass(options.classPrefix + '-handle').css({
|
|
position: 'absolute',
|
|
fontSize: 0,
|
|
zIndex: zIndex + 1 || 1
|
|
});
|
|
|
|
if (!parseInt($handles.css('width')) >= 0)
|
|
$handles.width(5).height(5);
|
|
|
|
if (o = options.borderWidth)
|
|
$handles.css({ borderWidth: o, borderStyle: 'solid' });
|
|
|
|
styleOptions($handles, { borderColor1: 'border-color',
|
|
borderColor2: 'background-color',
|
|
borderOpacity: 'opacity' });
|
|
}
|
|
|
|
scaleX = options.imageWidth / imgWidth || 1;
|
|
scaleY = options.imageHeight / imgHeight || 1;
|
|
|
|
if (newOptions.x1 != null) {
|
|
setSelection(newOptions.x1, newOptions.y1, newOptions.x2,
|
|
newOptions.y2);
|
|
newOptions.show = !newOptions.hide;
|
|
}
|
|
|
|
if (newOptions.keys)
|
|
options.keys = $.extend({ shift: 1, ctrl: 'resize' },
|
|
newOptions.keys);
|
|
|
|
$outer.addClass(options.classPrefix + '-outer');
|
|
$area.addClass(options.classPrefix + '-selection');
|
|
for (i = 0; i++ < 4;)
|
|
$($border[i-1]).addClass(options.classPrefix + '-border' + i);
|
|
|
|
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 });
|
|
|
|
$box.append($area.add($border).add($areaOpera).add($handles));
|
|
|
|
if ($.browser.msie) {
|
|
if (o = $outer.css('filter').match(/opacity=([0-9]+)/))
|
|
$outer.css('opacity', o[1]/100);
|
|
if (o = $border.css('filter').match(/opacity=([0-9]+)/))
|
|
$border.css('opacity', o[1]/100);
|
|
}
|
|
|
|
if (newOptions.hide)
|
|
hide($box.add($outer));
|
|
else if (newOptions.show && imgLoaded) {
|
|
shown = true;
|
|
$box.add($outer).fadeIn(options.fadeSpeed||0);
|
|
doUpdate();
|
|
}
|
|
|
|
aspectRatio = (d = (options.aspectRatio || '').split(/:/))[0] / d[1];
|
|
|
|
$img.add($outer).unbind('mousedown', imgMouseDown);
|
|
|
|
if (options.disable || options.enable === false) {
|
|
$box.unbind('mousemove', areaMouseMove).unbind('mousedown', areaMouseDown);
|
|
$(window).unbind('resize', windowResize);
|
|
}
|
|
else {
|
|
if (options.enable || options.disable === false) {
|
|
if (options.resizable || options.movable)
|
|
$box.mousemove(areaMouseMove).mousedown(areaMouseDown);
|
|
|
|
$(window).resize(windowResize);
|
|
}
|
|
|
|
if (!options.persistent)
|
|
$img.add($outer).mousedown(imgMouseDown);
|
|
}
|
|
|
|
options.enable = options.disable = undefined;
|
|
}
|
|
|
|
this.remove = function () {
|
|
setOptions({ disable: true });
|
|
$box.add($outer).remove();
|
|
};
|
|
|
|
this.getOptions = function () { return options; };
|
|
|
|
this.setOptions = setOptions;
|
|
|
|
this.getSelection = getSelection;
|
|
|
|
this.setSelection = setSelection;
|
|
|
|
this.update = doUpdate;
|
|
|
|
$p = $img;
|
|
|
|
while ($p.length) {
|
|
zIndex = max(zIndex,
|
|
!isNaN($p.css('z-index')) ? $p.css('z-index') : zIndex);
|
|
if ($p.css('position') == 'fixed')
|
|
position = 'fixed';
|
|
|
|
$p = $p.parent(':not(body)');
|
|
}
|
|
|
|
zIndex = options.zIndex || zIndex;
|
|
|
|
if ($.browser.msie)
|
|
$img.attr('unselectable', 'on');
|
|
|
|
$.imgAreaSelect.keyPress = $.browser.msie ||
|
|
$.browser.safari ? 'keydown' : 'keypress';
|
|
|
|
if ($.browser.opera)
|
|
$areaOpera = div().css({ width: '100%', height: '100%',
|
|
position: 'absolute', zIndex: zIndex + 2 || 2 });
|
|
|
|
$box.add($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 });
|
|
|
|
img.complete || img.readyState == 'complete' || !$img.is('img') ?
|
|
imgLoad() : $img.one('load', imgLoad);
|
|
|
|
if ($.browser.msie && $.browser.version >= 9)
|
|
img.src = img.src;
|
|
};
|
|
|
|
$.fn.imgAreaSelect = function (options) {
|
|
options = options || {};
|
|
|
|
this.each(function () {
|
|
if ($(this).data('imgAreaSelect')) {
|
|
if (options.remove) {
|
|
$(this).data('imgAreaSelect').remove();
|
|
$(this).removeData('imgAreaSelect');
|
|
}
|
|
else
|
|
$(this).data('imgAreaSelect').setOptions(options);
|
|
}
|
|
else if (!options.remove) {
|
|
if (options.enable === undefined && options.disable === undefined)
|
|
options.enable = true;
|
|
|
|
$(this).data('imgAreaSelect', new $.imgAreaSelect(this, options));
|
|
}
|
|
});
|
|
|
|
if (options.instance)
|
|
return $(this).data('imgAreaSelect');
|
|
|
|
return this;
|
|
};
|
|
|
|
})(jQuery);
|