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Copyright 2012 Raising the Floor - US Copyright 2014 Raising the Floor - International Licensed under the Educational Community License (ECL), Version 2.0 or the New BSD license. You may not use this file except in compliance with one these Licenses. You may obtain a copy of the ECL 2.0 License and BSD License at https://github.com/fluid-project/infusion/raw/master/Infusion-LICENSE.txt */ var fluid_3_0_0 = fluid_3_0_0 || {}; (function ($, fluid) { "use strict"; fluid.orientation = { HORIZONTAL: 4, VERTICAL: 1 }; fluid.rectSides = { // agree with fluid.orientation 4: ["left", "right"], 1: ["top", "bottom"], // agree with fluid.direction 8: "top", 12: "bottom", 2: "left", 3: "right" }; /** * This is the position, relative to a given drop target, that a dragged item should be dropped. */ fluid.position = { BEFORE: -1, AFTER: 1, INSIDE: 2, REPLACE: 3 }; /** * For incrementing/decrementing a count or index, or moving in a rectilinear direction. */ fluid.direction = { NEXT: 1, PREVIOUS: -1, UP: 8, DOWN: 12, LEFT: 2, RIGHT: 3 }; fluid.directionSign = function (direction) { return direction === fluid.direction.UP || direction === fluid.direction.LEFT ? fluid.direction.PREVIOUS : fluid.direction.NEXT; }; fluid.directionAxis = function (direction) { return direction === fluid.direction.LEFT || direction === fluid.direction.RIGHT ? 0 : 1; }; fluid.directionOrientation = function (direction) { return fluid.directionAxis(direction) ? fluid.orientation.VERTICAL : fluid.orientation.HORIZONTAL; }; fluid.keycodeDirection = { up: fluid.direction.UP, down: fluid.direction.DOWN, left: fluid.direction.LEFT, right: fluid.direction.RIGHT }; fluid.registerNamespace("fluid.dom"); // moves a single node in the DOM to a new position relative to another // unsupported, NON-API function fluid.dom.moveDom = function (source, target, position) { source = fluid.unwrap(source); target = fluid.unwrap(target); var scan; // fluid.log("moveDom source " + fluid.dumpEl(source) + " target " + fluid.dumpEl(target) + " position " + position); if (position === fluid.position.INSIDE) { target.appendChild(source); } else if (position === fluid.position.BEFORE) { for (scan = target.previousSibling;; scan = scan.previousSibling) { if (!scan || !fluid.dom.isIgnorableNode(scan)) { if (scan !== source) { fluid.dom.cleanseScripts(source); target.parentNode.insertBefore(source, target); } break; } } } else Eif (position === fluid.position.AFTER) { for (scan = target.nextSibling;; scan = scan.nextSibling) { if (!scan || !fluid.dom.isIgnorableNode(scan)) { if (scan !== source) { fluid.dom.cleanseScripts(source); fluid.dom.insertAfter(source, target); } break; } } } else { fluid.fail("Unrecognised position supplied to fluid.moveDom: " + position); } }; // unsupported, NON-API function fluid.dom.normalisePosition = function (position, samespan, targeti, sourcei) { // convert a REPLACE into a primitive BEFORE/AFTER if (position === fluid.position.REPLACE) { position = samespan && targeti >= sourcei ? fluid.position.AFTER : fluid.position.BEFORE; } return position; }; fluid.dom.permuteDom = function (element, target, position, sourceelements, targetelements) { element = fluid.unwrap(element); target = fluid.unwrap(target); var sourcei = $.inArray(element, sourceelements); Iif (sourcei === -1) { fluid.fail("Error in permuteDom: source element " + fluid.dumpEl(element) + " not found in source list " + fluid.dumpEl(sourceelements)); } var targeti = $.inArray(target, targetelements); Iif (targeti === -1) { fluid.fail("Error in permuteDom: target element " + fluid.dumpEl(target) + " not found in source list " + fluid.dumpEl(targetelements)); } var samespan = sourceelements === targetelements; position = fluid.dom.normalisePosition(position, samespan, targeti, sourcei); //fluid.log("permuteDom sourcei " + sourcei + " targeti " + targeti); // cache the old neighbourhood of the element for the final move var oldn = {}; oldn[fluid.position.AFTER] = element.nextSibling; oldn[fluid.position.BEFORE] = element.previousSibling; fluid.dom.moveDom(sourceelements[sourcei], targetelements[targeti], position); // perform the leftward-moving, AFTER shift var frontlimit = samespan ? targeti - 1 : sourceelements.length - 2; var i; if (position === fluid.position.BEFORE && samespan) { // we cannot do skip processing if the element was "fused against the grain" frontlimit--; } if (!samespan || targeti > sourcei) { for (i = frontlimit; i > sourcei; --i) { fluid.dom.moveDom(sourceelements[i + 1], sourceelements[i], fluid.position.AFTER); } if (sourcei + 1 < sourceelements.length) { fluid.dom.moveDom(sourceelements[sourcei + 1], oldn[fluid.position.AFTER], fluid.position.BEFORE); } } // perform the rightward-moving, BEFORE shift var backlimit = samespan ? sourcei - 1 : targetelements.length - 1; if (position === fluid.position.AFTER) { // we cannot do skip processing if the element was "fused against the grain" targeti++; } if (!samespan || targeti < sourcei) { for (i = targeti; i < backlimit; ++i) { fluid.dom.moveDom(targetelements[i], targetelements[i + 1], fluid.position.BEFORE); } if (backlimit >= 0 && backlimit < targetelements.length - 1) { fluid.dom.moveDom(targetelements[backlimit], oldn[fluid.position.BEFORE], fluid.position.AFTER); } } }; var curCss = function (a, name) { return window.getComputedStyle ? window.getComputedStyle(a, null).getPropertyValue(name) : a.currentStyle[name]; }; fluid.dom.isAttached = function (node) { while (node && node.nodeName) { if (node.nodeName === "BODY") { return true; } node = node.parentNode; } return false; }; fluid.dom.generalHidden = function (a) { return "hidden" === a.type || curCss(a, "display") === "none" || curCss(a, "visibility") === "hidden" || !fluid.dom.isAttached(a); }; fluid.registerNamespace("fluid.geometricManager"); fluid.geometricManager.computeGeometry = function (element, orientation, disposition) { var elem = {}; elem.element = element; elem.orientation = orientation; if (disposition === fluid.position.INSIDE) { elem.position = disposition; } Iif (fluid.dom.generalHidden(element)) { elem.clazz = "hidden"; } var pos = fluid.dom.computeAbsolutePosition(element) || [0, 0]; var width = element.offsetWidth; var height = element.offsetHeight; elem.rect = {left: pos[0], top: pos[1]}; elem.rect.right = pos[0] + width; elem.rect.bottom = pos[1] + height; return elem; }; // A "suitable large" value for the sentinel blocks at the ends of spans var SENTINEL_DIMENSION = 10000; fluid.geometricManager.dumprect = function (rect) { return "Rect top: " + rect.top + " left: " + rect.left + " bottom: " + rect.bottom + " right: " + rect.right; }; fluid.geometricManager.dumpelem = function (cacheelem) { if (!cacheelem || !cacheelem.rect) { return "null"; } else { return fluid.geometricManager.dumprect(cacheelem.rect) + " position: " + cacheelem.position + " for " + fluid.dumpEl(cacheelem.element); } }; // unsupported, NON-API function fluid.dropManager = function () { var targets = []; var cache = {}; var that = {}; var lastClosest; var lastGeometry; var displacementX, displacementY; that.updateGeometry = function (geometricInfo) { lastGeometry = geometricInfo; targets = []; cache = {}; var mapper = geometricInfo.elementMapper; var geometryComputor = geometricInfo.geometryComputor || fluid.geometricManager.computeGeometry; var processElement = function (element, extent, sentB, sentF, disposition, index) { var orientation = extent.orientation; var sides = fluid.rectSides[orientation]; var cacheelem = geometryComputor(element, orientation, disposition); cacheelem.owner = extent; if (cacheelem.clazz !== "hidden" && mapper) { cacheelem.clazz = mapper(element); } cache[fluid.dropManager.cacheKey(element)] = cacheelem; var backClass = fluid.dropManager.getRelativeClass(extent.elements, index, fluid.position.BEFORE, cacheelem.clazz, mapper); var frontClass = fluid.dropManager.getRelativeClass(extent.elements, index, fluid.position.AFTER, cacheelem.clazz, mapper); if (disposition === fluid.position.INSIDE) { targets[targets.length] = cacheelem; } else { fluid.dropManager.splitElement(targets, sides, cacheelem, disposition, backClass, frontClass); } // deal with sentinel blocks by creating near-copies of the end elements if (sentB && geometricInfo.sentinelize) { fluid.dropManager.sentinelizeElement(targets, sides, cacheelem, 1, disposition, backClass); } if (sentF && geometricInfo.sentinelize) { fluid.dropManager.sentinelizeElement(targets, sides, cacheelem, 0, disposition, frontClass); } //fluid.log(dumpelem(cacheelem)); return cacheelem; }; for (var i = 0; i < geometricInfo.extents.length; ++i) { var thisInfo = geometricInfo.extents[i]; var allHidden = true; for (var j = 0; j < thisInfo.elements.length; ++j) { var element = thisInfo.elements[j]; var cacheelem = processElement(element, thisInfo, j === 0, j === thisInfo.elements.length - 1, fluid.position.INTERLEAVED, j); Eif (cacheelem.clazz !== "hidden") { allHidden = false; } } if (allHidden && thisInfo.parentElement) { processElement(thisInfo.parentElement, thisInfo, true, true, fluid.position.INSIDE); } } fluid.dropManager.normalizeSentinels(targets); }; that.startDrag = function (event, handlePos, handleWidth, handleHeight) { var handleMidX = handlePos[0] + handleWidth / 2; var handleMidY = handlePos[1] + handleHeight / 2; var dX = handleMidX - event.pageX; var dY = handleMidY - event.pageY; that.updateGeometry(lastGeometry); lastClosest = null; displacementX = dX; displacementY = dY; $("body").on("mousemove.fluid-dropManager", that.mouseMove); }; that.lastPosition = function () { return lastClosest; }; that.endDrag = function () { $("body").off("mousemove.fluid-dropManager"); }; that.mouseMove = function (evt) { var x = evt.pageX + displacementX; var y = evt.pageY + displacementY; //fluid.log("Mouse x " + x + " y " + y ); var closestTarget = that.closestTarget(x, y, lastClosest); if (closestTarget && closestTarget !== fluid.dropManager.NO_CHANGE) { lastClosest = closestTarget; that.dropChangeFirer.fire(closestTarget); } }; that.dropChangeFirer = fluid.makeEventFirer(); var blankHolder = { element: null }; that.closestTarget = function (x, y, lastClosest) { var mindistance = Number.MAX_VALUE; var minelem = blankHolder; var minlockeddistance = Number.MAX_VALUE; var minlockedelem = blankHolder; for (var i = 0; i < targets.length; ++i) { var cacheelem = targets[i]; Iif (cacheelem.clazz === "hidden") { continue; } var distance = fluid.geom.minPointRectangle(x, y, cacheelem.rect); Iif (cacheelem.clazz === "locked") { if (distance < minlockeddistance) { minlockeddistance = distance; minlockedelem = cacheelem; } } else { if (distance < mindistance) { mindistance = distance; minelem = cacheelem; } if (distance === 0) { break; } } } Iif (!minelem) { return minelem; } Eif (minlockeddistance >= mindistance) { minlockedelem = blankHolder; } //fluid.log("PRE: mindistance " + mindistance + " element " + // fluid.dumpEl(minelem.element) + " minlockeddistance " + minlockeddistance // + " locked elem " + dumpelem(minlockedelem)); Iif (lastClosest && lastClosest.position === minelem.position && fluid.unwrap(lastClosest.element) === fluid.unwrap(minelem.element) && fluid.unwrap(lastClosest.lockedelem) === fluid.unwrap(minlockedelem.element) ) { return fluid.dropManager.NO_CHANGE; } //fluid.log("mindistance " + mindistance + " minlockeddistance " + minlockeddistance); return { position: minelem.position, element: minelem.element, lockedelem: minlockedelem.element }; }; that.shuffleProjectFrom = function (element, direction, includeLocked, disableWrap) { var togo = that.projectFrom(element, direction, includeLocked, disableWrap); if (togo) { togo.position = fluid.position.REPLACE; } return togo; }; that.projectFrom = function (element, direction, includeLocked, disableWrap) { that.updateGeometry(lastGeometry); var cacheelem = cache[fluid.dropManager.cacheKey(element)]; var projected = fluid.geom.projectFrom(cacheelem.rect, direction, targets, includeLocked, disableWrap); if (!projected.cacheelem) { return null; } var retpos = projected.cacheelem.position; return {element: projected.cacheelem.element, position: retpos ? retpos : fluid.position.BEFORE }; }; that.logicalFrom = function (element, direction, includeLocked, disableWrap) { var orderables = that.getOwningSpan(element, fluid.position.INTERLEAVED, includeLocked); return {element: fluid.dropManager.getRelativeElement(element, direction, orderables, disableWrap), position: fluid.position.REPLACE}; }; that.lockedWrapFrom = function (element, direction, includeLocked, disableWrap) { var base = that.logicalFrom(element, direction, includeLocked, disableWrap); var selectables = that.getOwningSpan(element, fluid.position.INTERLEAVED, includeLocked); var allElements = cache[fluid.dropManager.cacheKey(element)].owner.elements; if (includeLocked || selectables[0] === allElements[0]) { return base; } var directElement = fluid.dropManager.getRelativeElement(element, direction, allElements, disableWrap); if (lastGeometry.elementMapper(directElement) === "locked") { base.element = null; base.clazz = "locked"; } return base; }; that.getOwningSpan = function (element, position, includeLocked) { var owner = cache[fluid.dropManager.cacheKey(element)].owner; var elements = position === fluid.position.INSIDE ? [owner.parentElement] : owner.elements; if (!includeLocked && lastGeometry.elementMapper) { elements = fluid.makeArray(elements); fluid.remove_if(elements, function (element) { return lastGeometry.elementMapper(element) === "locked"; }); } return elements; }; that.geometricMove = function (element, target, position) { var sourceElements = that.getOwningSpan(element, null, true); var targetElements = that.getOwningSpan(target, position, true); fluid.dom.permuteDom(element, target, position, sourceElements, targetElements); }; return that; }; fluid.dropManager.NO_CHANGE = "no change"; fluid.dropManager.cacheKey = function (element) { return fluid.allocateSimpleId(element); }; fluid.dropManager.sentinelizeElement = function (targets, sides, cacheelem, fc, disposition, clazz) { var elemCopy = $.extend(true, {}, cacheelem); elemCopy.origRect = fluid.copy(elemCopy.rect); elemCopy.rect[sides[fc]] = elemCopy.rect[sides[1 - fc]] + (fc ? 1 : -1); elemCopy.rect[sides[1 - fc]] = (fc ? -1 : 1) * SENTINEL_DIMENSION; elemCopy.position = disposition === fluid.position.INSIDE ? disposition : (fc ? fluid.position.BEFORE : fluid.position.AFTER); elemCopy.clazz = clazz; targets[targets.length] = elemCopy; }; // This function is necessary to prevent overlapping sentinels for FLUID-4692 // Very sadly this simple implementation now makes the setup O(n^2) in the number of elements fluid.dropManager.normalizeSentinels = function (targets) { for (var i = 0; i < targets.length; ++i) { for (var j = 0; j < targets.length; ++j) { var ti = targets[i], tj = targets[j]; var jrect = tj.origRect || tj.rect; if (ti.element !== tj.element && ti.origRect && fluid.geom.minRectRect(ti.rect, jrect) === 0) { ti.rect = ti.origRect; delete ti.origRect; } } } }; fluid.dropManager.splitElement = function (targets, sides, cacheelem, disposition, clazz1, clazz2) { var elem1 = $.extend(true, {}, cacheelem); var elem2 = $.extend(true, {}, cacheelem); var midpoint = (elem1.rect[sides[0]] + elem1.rect[sides[1]]) / 2; elem1.rect[sides[1]] = midpoint; elem1.position = fluid.position.BEFORE; elem2.rect[sides[0]] = midpoint; elem2.position = fluid.position.AFTER; elem1.clazz = clazz1; elem2.clazz = clazz2; targets[targets.length] = elem1; targets[targets.length] = elem2; }; // Expand this configuration point if we ever go back to a full "permissions" model fluid.dropManager.getRelativeClass = function (thisElements, index, relative, thisclazz, mapper) { index += relative; if (index < 0 && thisclazz === "locked") { return "locked"; } if (index >= thisElements.length || mapper === null) { return null; } else { relative = thisElements[index]; return mapper(relative) === "locked" && thisclazz === "locked" ? "locked" : null; } }; fluid.dropManager.getRelativeElement = function (element, direction, elements, disableWrap) { var folded = fluid.directionSign(direction); var index = $(elements).index(element) + folded; if (index < 0) { index += elements.length; } // disable wrap if (disableWrap) { if (index === elements.length || index === (elements.length + folded)) { return element; } } index %= elements.length; return elements[index]; }; fluid.geom = fluid.geom || {}; // These distance algorithms have been taken from // http://www.cs.mcgill.ca/~cs644/Godfried/2005/Fall/fzamal/concepts.htm /* Returns the minimum squared distance between a point and a rectangle */ fluid.geom.minPointRectangle = function (x, y, rectangle) { var dx = x < rectangle.left ? (rectangle.left - x) : (x > rectangle.right ? (x - rectangle.right) : 0); var dy = y < rectangle.top ? (rectangle.top - y) : (y > rectangle.bottom ? (y - rectangle.bottom) : 0); return dx * dx + dy * dy; }; /* Returns the minimum squared distance between two rectangles */ fluid.geom.minRectRect = function (rect1, rect2) { var dx = rect1.right < rect2.left ? rect2.left - rect1.right : rect2.right < rect1.left ? rect1.left - rect2.right : 0; var dy = rect1.bottom < rect2.top ? rect2.top - rect1.bottom : rect2.bottom < rect1.top ? rect1.top - rect2.bottom : 0; return dx * dx + dy * dy; }; var makePenCollect = function () { return { mindist: Number.MAX_VALUE, minrdist: Number.MAX_VALUE }; }; /** Determine the one amongst a set of rectangle targets which is the "best fit" * for an axial motion from a "base rectangle" (commonly arising from the case * of cursor key navigation). * @param {Rectangle} baserect - The base rectangle from which the motion is to be referred. * @param {Object} direction - The direction of motion, which should be an instance of fluid.direction. * @param {Array} targets - An array of objects "cache elements" for which the member <code>rect</code> is the * holder of the rectangle to be tested. * @param {Boolean} forSelection - Set to `true` to indicate that we are dealing with a selection. * @param {Boolean} disableWrap - Set to `true` to disable wrapping of elements. * @return {Object} - The cache element which is the most appropriate for the requested motion. */ fluid.geom.projectFrom = function (baserect, direction, targets, forSelection, disableWrap) { var axis = fluid.directionAxis(direction); var frontSide = fluid.rectSides[direction]; var backSide = fluid.rectSides[axis * 15 + 5 - direction]; var dirSign = fluid.directionSign(direction); var penrect = {left: (7 * baserect.left + 1 * baserect.right) / 8, right: (5 * baserect.left + 3 * baserect.right) / 8, top: (7 * baserect.top + 1 * baserect.bottom) / 8, bottom: (5 * baserect.top + 3 * baserect.bottom) / 8}; penrect[frontSide] = dirSign * SENTINEL_DIMENSION; penrect[backSide] = -penrect[frontSide]; function accPen(collect, cacheelem, backSign) { var thisrect = cacheelem.rect; var pdist = fluid.geom.minRectRect(penrect, thisrect); var rdist = -dirSign * backSign * (baserect[backSign === 1 ? frontSide : backSide] - thisrect[backSign === 1 ? backSide : frontSide]); // fluid.log("pdist: " + pdist + " rdist: " + rdist); // the oddity in the rdist comparison is intended to express "half-open"-ness of rectangles // (backSign === 1 ? 0 : 1) - this is now gone - must be possible to move to perpendicularly abutting regions if (pdist <= collect.mindist && rdist >= 0) { if (pdist === collect.mindist && rdist * backSign > collect.minrdist) { return; } collect.minrdist = rdist * backSign; collect.mindist = pdist; collect.minelem = cacheelem; } } var collect = makePenCollect(); var backcollect = makePenCollect(); var lockedcollect = makePenCollect(); for (var i = 0; i < targets.length; ++i) { var elem = targets[i]; var isPure = elem.owner && elem.element === elem.owner.parentElement; Iif (elem.clazz === "hidden" || (forSelection && isPure)) { continue; } else if (!forSelection && elem.clazz === "locked") { accPen(lockedcollect, elem, 1); } else { accPen(collect, elem, 1); accPen(backcollect, elem, -1); } //fluid.log("Element " + i + " " + dumpelem(elem) + " mindist " + collect.mindist); } var wrap = !collect.minelem || backcollect.mindist < collect.mindist; // disable wrap wrap = wrap && !disableWrap; var mincollect = wrap ? backcollect : collect; var togo = { wrapped: wrap, cacheelem: mincollect.minelem }; Iif (lockedcollect.mindist < mincollect.mindist) { togo.lockedelem = lockedcollect.minelem; } return togo; }; })(jQuery, fluid_3_0_0); |