gecko/browser/components/tabview/items.js
2012-05-21 12:12:37 +01:00

1082 lines
34 KiB
JavaScript

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// **********
// Title: items.js
// ##########
// Class: Item
// Superclass for all visible objects (<TabItem>s and <GroupItem>s).
//
// If you subclass, in addition to the things Item provides, you need to also provide these methods:
// setBounds - function(rect, immediately, options)
// setZ - function(value)
// close - function()
// save - function()
//
// Subclasses of Item must also provide the <Subscribable> interface.
//
// ... and this property:
// defaultSize - a Point
//
// Make sure to call _init() from your subclass's constructor.
function Item() {
// Variable: isAnItem
// Always true for Items
this.isAnItem = true;
// Variable: bounds
// The position and size of this Item, represented as a <Rect>.
// This should never be modified without using setBounds()
this.bounds = null;
// Variable: zIndex
// The z-index for this item.
this.zIndex = 0;
// Variable: container
// The outermost DOM element that describes this item on screen.
this.container = null;
// Variable: parent
// The groupItem that this item is a child of
this.parent = null;
// Variable: userSize
// A <Point> that describes the last size specifically chosen by the user.
// Used by unsquish.
this.userSize = null;
// Variable: dragOptions
// Used by <draggable>
//
// Possible properties:
// cancelClass - A space-delimited list of classes that should cancel a drag
// start - A function to be called when a drag starts
// drag - A function to be called each time the mouse moves during drag
// stop - A function to be called when the drag is done
this.dragOptions = null;
// Variable: dropOptions
// Used by <draggable> if the item is set to droppable.
//
// Possible properties:
// accept - A function to determine if a particular item should be accepted for dropping
// over - A function to be called when an item is over this item
// out - A function to be called when an item leaves this item
// drop - A function to be called when an item is dropped in this item
this.dropOptions = null;
// Variable: resizeOptions
// Used by <resizable>
//
// Possible properties:
// minWidth - Minimum width allowable during resize
// minHeight - Minimum height allowable during resize
// aspectRatio - true if we should respect aspect ratio; default false
// start - A function to be called when resizing starts
// resize - A function to be called each time the mouse moves during resize
// stop - A function to be called when the resize is done
this.resizeOptions = null;
// Variable: isDragging
// Boolean for whether the item is currently being dragged or not.
this.isDragging = false;
};
Item.prototype = {
// ----------
// Function: _init
// Initializes the object. To be called from the subclass's intialization function.
//
// Parameters:
// container - the outermost DOM element that describes this item onscreen.
_init: function Item__init(container) {
Utils.assert(typeof this.addSubscriber == 'function' &&
typeof this.removeSubscriber == 'function' &&
typeof this._sendToSubscribers == 'function',
'Subclass must implement the Subscribable interface');
Utils.assert(Utils.isDOMElement(container), 'container must be a DOM element');
Utils.assert(typeof this.setBounds == 'function', 'Subclass must provide setBounds');
Utils.assert(typeof this.setZ == 'function', 'Subclass must provide setZ');
Utils.assert(typeof this.close == 'function', 'Subclass must provide close');
Utils.assert(typeof this.save == 'function', 'Subclass must provide save');
Utils.assert(Utils.isPoint(this.defaultSize), 'Subclass must provide defaultSize');
Utils.assert(Utils.isRect(this.bounds), 'Subclass must provide bounds');
this.container = container;
this.$container = iQ(container);
iQ(this.container).data('item', this);
// ___ drag
this.dragOptions = {
cancelClass: 'close stackExpander',
start: function(e, ui) {
UI.setActive(this);
if (this.isAGroupItem)
this._unfreezeItemSize();
// if we start dragging a tab within a group, start with dropSpace on.
else if (this.parent != null)
this.parent._dropSpaceActive = true;
drag.info = new Drag(this, e);
},
drag: function(e) {
drag.info.drag(e);
},
stop: function() {
drag.info.stop();
if (!this.isAGroupItem && !this.parent) {
new GroupItem([drag.info.$el], {focusTitle: true});
gTabView.firstUseExperienced = true;
}
drag.info = null;
},
// The minimum the mouse must move after mouseDown in order to move an
// item
minDragDistance: 3
};
// ___ drop
this.dropOptions = {
over: function() {},
out: function() {
let groupItem = drag.info.item.parent;
if (groupItem)
groupItem.remove(drag.info.$el, {dontClose: true});
iQ(this.container).removeClass("acceptsDrop");
},
drop: function(event) {
iQ(this.container).removeClass("acceptsDrop");
},
// Function: dropAcceptFunction
// Given a DOM element, returns true if it should accept tabs being dropped on it.
// Private to this file.
accept: function dropAcceptFunction(item) {
return (item && item.isATabItem && (!item.parent || !item.parent.expanded));
}
};
// ___ resize
var self = this;
this.resizeOptions = {
aspectRatio: self.keepProportional,
minWidth: 90,
minHeight: 90,
start: function(e,ui) {
UI.setActive(this);
resize.info = new Drag(this, e);
},
resize: function(e,ui) {
resize.info.snap(UI.rtl ? 'topright' : 'topleft', false, self.keepProportional);
},
stop: function() {
self.setUserSize();
self.pushAway();
resize.info.stop();
resize.info = null;
}
};
},
// ----------
// Function: getBounds
// Returns a copy of the Item's bounds as a <Rect>.
getBounds: function Item_getBounds() {
Utils.assert(Utils.isRect(this.bounds), 'this.bounds should be a rect');
return new Rect(this.bounds);
},
// ----------
// Function: overlapsWithOtherItems
// Returns true if this Item overlaps with any other Item on the screen.
overlapsWithOtherItems: function Item_overlapsWithOtherItems() {
var self = this;
var items = Items.getTopLevelItems();
var bounds = this.getBounds();
return items.some(function(item) {
if (item == self) // can't overlap with yourself.
return false;
var myBounds = item.getBounds();
return myBounds.intersects(bounds);
} );
},
// ----------
// Function: setPosition
// Moves the Item to the specified location.
//
// Parameters:
// left - the new left coordinate relative to the window
// top - the new top coordinate relative to the window
// immediately - if false or omitted, animates to the new position;
// otherwise goes there immediately
setPosition: function Item_setPosition(left, top, immediately) {
Utils.assert(Utils.isRect(this.bounds), 'this.bounds');
this.setBounds(new Rect(left, top, this.bounds.width, this.bounds.height), immediately);
},
// ----------
// Function: setSize
// Resizes the Item to the specified size.
//
// Parameters:
// width - the new width in pixels
// height - the new height in pixels
// immediately - if false or omitted, animates to the new size;
// otherwise resizes immediately
setSize: function Item_setSize(width, height, immediately) {
Utils.assert(Utils.isRect(this.bounds), 'this.bounds');
this.setBounds(new Rect(this.bounds.left, this.bounds.top, width, height), immediately);
},
// ----------
// Function: setUserSize
// Remembers the current size as one the user has chosen.
setUserSize: function Item_setUserSize() {
Utils.assert(Utils.isRect(this.bounds), 'this.bounds');
this.userSize = new Point(this.bounds.width, this.bounds.height);
this.save();
},
// ----------
// Function: getZ
// Returns the zIndex of the Item.
getZ: function Item_getZ() {
return this.zIndex;
},
// ----------
// Function: setRotation
// Rotates the object to the given number of degrees.
setRotation: function Item_setRotation(degrees) {
var value = degrees ? "rotate(%deg)".replace(/%/, degrees) : null;
iQ(this.container).css({"-moz-transform": value});
},
// ----------
// Function: setParent
// Sets the receiver's parent to the given <Item>.
setParent: function Item_setParent(parent) {
this.parent = parent;
this.removeTrenches();
this.save();
},
// ----------
// Function: pushAway
// Pushes all other items away so none overlap this Item.
//
// Parameters:
// immediately - boolean for doing the pushAway without animation
pushAway: function Item_pushAway(immediately) {
var items = Items.getTopLevelItems();
// we need at least two top-level items to push something away
if (items.length < 2)
return;
var buffer = Math.floor(Items.defaultGutter / 2);
// setup each Item's pushAwayData attribute:
items.forEach(function pushAway_setupPushAwayData(item) {
var data = {};
data.bounds = item.getBounds();
data.startBounds = new Rect(data.bounds);
// Infinity = (as yet) unaffected
data.generation = Infinity;
item.pushAwayData = data;
});
// The first item is a 0-generation pushed item. It all starts here.
var itemsToPush = [this];
this.pushAwayData.generation = 0;
var pushOne = function Item_pushAway_pushOne(baseItem) {
// the baseItem is an n-generation pushed item. (n could be 0)
var baseData = baseItem.pushAwayData;
var bb = new Rect(baseData.bounds);
// make the bounds larger, adding a +buffer margin to each side.
bb.inset(-buffer, -buffer);
// bbc = center of the base's bounds
var bbc = bb.center();
items.forEach(function Item_pushAway_pushOne_pushEach(item) {
if (item == baseItem)
return;
var data = item.pushAwayData;
// if the item under consideration has already been pushed, or has a lower
// "generation" (and thus an implictly greater placement priority) then don't move it.
if (data.generation <= baseData.generation)
return;
// box = this item's current bounds, with a +buffer margin.
var bounds = data.bounds;
var box = new Rect(bounds);
box.inset(-buffer, -buffer);
// if the item under consideration overlaps with the base item...
if (box.intersects(bb)) {
// Let's push it a little.
// First, decide in which direction and how far to push. This is the offset.
var offset = new Point();
// center = the current item's center.
var center = box.center();
// Consider the relationship between the current item (box) + the base item.
// If it's more vertically stacked than "side by side"...
if (Math.abs(center.x - bbc.x) < Math.abs(center.y - bbc.y)) {
// push vertically.
if (center.y > bbc.y)
offset.y = bb.bottom - box.top;
else
offset.y = bb.top - box.bottom;
} else { // if they're more "side by side" than stacked vertically...
// push horizontally.
if (center.x > bbc.x)
offset.x = bb.right - box.left;
else
offset.x = bb.left - box.right;
}
// Actually push the Item.
bounds.offset(offset);
// This item now becomes an (n+1)-generation pushed item.
data.generation = baseData.generation + 1;
// keep track of who pushed this item.
data.pusher = baseItem;
// add this item to the queue, so that it, in turn, can push some other things.
itemsToPush.push(item);
}
});
};
// push each of the itemsToPush, one at a time.
// itemsToPush starts with just [this], but pushOne can add more items to the stack.
// Maximally, this could run through all Items on the screen.
while (itemsToPush.length)
pushOne(itemsToPush.shift());
// ___ Squish!
var pageBounds = Items.getSafeWindowBounds();
items.forEach(function Item_pushAway_squish(item) {
var data = item.pushAwayData;
if (data.generation == 0)
return;
let apply = function Item_pushAway_squish_apply(item, posStep, posStep2, sizeStep) {
var data = item.pushAwayData;
if (data.generation == 0)
return;
var bounds = data.bounds;
bounds.width -= sizeStep.x;
bounds.height -= sizeStep.y;
bounds.left += posStep.x;
bounds.top += posStep.y;
let validSize;
if (item.isAGroupItem) {
validSize = GroupItems.calcValidSize(
new Point(bounds.width, bounds.height));
bounds.width = validSize.x;
bounds.height = validSize.y;
} else {
if (sizeStep.y > sizeStep.x) {
validSize = TabItems.calcValidSize(new Point(-1, bounds.height));
bounds.left += (bounds.width - validSize.x) / 2;
bounds.width = validSize.x;
} else {
validSize = TabItems.calcValidSize(new Point(bounds.width, -1));
bounds.top += (bounds.height - validSize.y) / 2;
bounds.height = validSize.y;
}
}
var pusher = data.pusher;
if (pusher) {
var newPosStep = new Point(posStep.x + posStep2.x, posStep.y + posStep2.y);
apply(pusher, newPosStep, posStep2, sizeStep);
}
}
var bounds = data.bounds;
var posStep = new Point();
var posStep2 = new Point();
var sizeStep = new Point();
if (bounds.left < pageBounds.left) {
posStep.x = pageBounds.left - bounds.left;
sizeStep.x = posStep.x / data.generation;
posStep2.x = -sizeStep.x;
} else if (bounds.right > pageBounds.right) { // this may be less of a problem post-601534
posStep.x = pageBounds.right - bounds.right;
sizeStep.x = -posStep.x / data.generation;
posStep.x += sizeStep.x;
posStep2.x = sizeStep.x;
}
if (bounds.top < pageBounds.top) {
posStep.y = pageBounds.top - bounds.top;
sizeStep.y = posStep.y / data.generation;
posStep2.y = -sizeStep.y;
} else if (bounds.bottom > pageBounds.bottom) { // this may be less of a problem post-601534
posStep.y = pageBounds.bottom - bounds.bottom;
sizeStep.y = -posStep.y / data.generation;
posStep.y += sizeStep.y;
posStep2.y = sizeStep.y;
}
if (posStep.x || posStep.y || sizeStep.x || sizeStep.y)
apply(item, posStep, posStep2, sizeStep);
});
// ___ Unsquish
var pairs = [];
items.forEach(function Item_pushAway_setupUnsquish(item) {
var data = item.pushAwayData;
pairs.push({
item: item,
bounds: data.bounds
});
});
Items.unsquish(pairs);
// ___ Apply changes
items.forEach(function Item_pushAway_setBounds(item) {
var data = item.pushAwayData;
var bounds = data.bounds;
if (!bounds.equals(data.startBounds)) {
item.setBounds(bounds, immediately);
}
});
},
// ----------
// Function: setTrenches
// Sets up/moves the trenches for snapping to this item.
setTrenches: function Item_setTrenches(rect) {
if (this.parent !== null)
return;
if (!this.borderTrenches)
this.borderTrenches = Trenches.registerWithItem(this,"border");
var bT = this.borderTrenches;
Trenches.getById(bT.left).setWithRect(rect);
Trenches.getById(bT.right).setWithRect(rect);
Trenches.getById(bT.top).setWithRect(rect);
Trenches.getById(bT.bottom).setWithRect(rect);
if (!this.guideTrenches)
this.guideTrenches = Trenches.registerWithItem(this,"guide");
var gT = this.guideTrenches;
Trenches.getById(gT.left).setWithRect(rect);
Trenches.getById(gT.right).setWithRect(rect);
Trenches.getById(gT.top).setWithRect(rect);
Trenches.getById(gT.bottom).setWithRect(rect);
},
// ----------
// Function: removeTrenches
// Removes the trenches for snapping to this item.
removeTrenches: function Item_removeTrenches() {
for (var edge in this.borderTrenches) {
Trenches.unregister(this.borderTrenches[edge]); // unregister can take an array
}
this.borderTrenches = null;
for (var edge in this.guideTrenches) {
Trenches.unregister(this.guideTrenches[edge]); // unregister can take an array
}
this.guideTrenches = null;
},
// ----------
// Function: snap
// The snap function used during groupItem creation via drag-out
//
// Parameters:
// immediately - bool for having the drag do the final positioning without animation
snap: function Item_snap(immediately) {
// make the snapping work with a wider range!
var defaultRadius = Trenches.defaultRadius;
Trenches.defaultRadius = 2 * defaultRadius; // bump up from 10 to 20!
var FauxDragInfo = new Drag(this, {});
FauxDragInfo.snap('none', false);
FauxDragInfo.stop(immediately);
Trenches.defaultRadius = defaultRadius;
},
// ----------
// Function: draggable
// Enables dragging on this item. Note: not to be called multiple times on the same item!
draggable: function Item_draggable() {
try {
Utils.assert(this.dragOptions, 'dragOptions');
var cancelClasses = [];
if (typeof this.dragOptions.cancelClass == 'string')
cancelClasses = this.dragOptions.cancelClass.split(' ');
var self = this;
var $container = iQ(this.container);
var startMouse;
var startPos;
var startSent;
var startEvent;
var droppables;
var dropTarget;
// determine the best drop target based on the current mouse coordinates
let determineBestDropTarget = function (e, box) {
// drop events
var best = {
dropTarget: null,
score: 0
};
droppables.forEach(function(droppable) {
var intersection = box.intersection(droppable.bounds);
if (intersection && intersection.area() > best.score) {
var possibleDropTarget = droppable.item;
var accept = true;
if (possibleDropTarget != dropTarget) {
var dropOptions = possibleDropTarget.dropOptions;
if (dropOptions && typeof dropOptions.accept == "function")
accept = dropOptions.accept.apply(possibleDropTarget, [self]);
}
if (accept) {
best.dropTarget = possibleDropTarget;
best.score = intersection.area();
}
}
});
return best.dropTarget;
}
// ___ mousemove
var handleMouseMove = function(e) {
// global drag tracking
drag.lastMoveTime = Date.now();
// positioning
var mouse = new Point(e.pageX, e.pageY);
if (!startSent) {
if(Math.abs(mouse.x - startMouse.x) > self.dragOptions.minDragDistance ||
Math.abs(mouse.y - startMouse.y) > self.dragOptions.minDragDistance) {
if (typeof self.dragOptions.start == "function")
self.dragOptions.start.apply(self,
[startEvent, {position: {left: startPos.x, top: startPos.y}}]);
startSent = true;
}
}
if (startSent) {
// drag events
var box = self.getBounds();
box.left = startPos.x + (mouse.x - startMouse.x);
box.top = startPos.y + (mouse.y - startMouse.y);
self.setBounds(box, true);
if (typeof self.dragOptions.drag == "function")
self.dragOptions.drag.apply(self, [e]);
let bestDropTarget = determineBestDropTarget(e, box);
if (bestDropTarget != dropTarget) {
var dropOptions;
if (dropTarget) {
dropOptions = dropTarget.dropOptions;
if (dropOptions && typeof dropOptions.out == "function")
dropOptions.out.apply(dropTarget, [e]);
}
dropTarget = bestDropTarget;
if (dropTarget) {
dropOptions = dropTarget.dropOptions;
if (dropOptions && typeof dropOptions.over == "function")
dropOptions.over.apply(dropTarget, [e]);
}
}
if (dropTarget) {
dropOptions = dropTarget.dropOptions;
if (dropOptions && typeof dropOptions.move == "function")
dropOptions.move.apply(dropTarget, [e]);
}
}
e.preventDefault();
};
// ___ mouseup
var handleMouseUp = function(e) {
iQ(gWindow)
.unbind('mousemove', handleMouseMove)
.unbind('mouseup', handleMouseUp);
if (startSent && dropTarget) {
var dropOptions = dropTarget.dropOptions;
if (dropOptions && typeof dropOptions.drop == "function")
dropOptions.drop.apply(dropTarget, [e]);
}
if (startSent && typeof self.dragOptions.stop == "function")
self.dragOptions.stop.apply(self, [e]);
e.preventDefault();
};
// ___ mousedown
$container.mousedown(function(e) {
if (!Utils.isLeftClick(e))
return;
var cancel = false;
var $target = iQ(e.target);
cancelClasses.forEach(function(className) {
if ($target.hasClass(className))
cancel = true;
});
if (cancel) {
e.preventDefault();
return;
}
startMouse = new Point(e.pageX, e.pageY);
let bounds = self.getBounds();
startPos = bounds.position();
startEvent = e;
startSent = false;
droppables = [];
iQ('.iq-droppable').each(function(elem) {
if (elem != self.container) {
var item = Items.item(elem);
droppables.push({
item: item,
bounds: item.getBounds()
});
}
});
dropTarget = determineBestDropTarget(e, bounds);
iQ(gWindow)
.mousemove(handleMouseMove)
.mouseup(handleMouseUp);
e.preventDefault();
});
} catch(e) {
Utils.log(e);
}
},
// ----------
// Function: droppable
// Enables or disables dropping on this item.
droppable: function Item_droppable(value) {
try {
var $container = iQ(this.container);
if (value) {
Utils.assert(this.dropOptions, 'dropOptions');
$container.addClass('iq-droppable');
} else
$container.removeClass('iq-droppable');
} catch(e) {
Utils.log(e);
}
},
// ----------
// Function: resizable
// Enables or disables resizing of this item.
resizable: function Item_resizable(value) {
try {
var $container = iQ(this.container);
iQ('.iq-resizable-handle', $container).remove();
if (!value) {
$container.removeClass('iq-resizable');
} else {
Utils.assert(this.resizeOptions, 'resizeOptions');
$container.addClass('iq-resizable');
var self = this;
var startMouse;
var startSize;
var startAspect;
// ___ mousemove
var handleMouseMove = function(e) {
// global resize tracking
resize.lastMoveTime = Date.now();
var mouse = new Point(e.pageX, e.pageY);
var box = self.getBounds();
if (UI.rtl) {
var minWidth = (self.resizeOptions.minWidth || 0);
var oldWidth = box.width;
if (minWidth != oldWidth || mouse.x < startMouse.x) {
box.width = Math.max(minWidth, startSize.x - (mouse.x - startMouse.x));
box.left -= box.width - oldWidth;
}
} else {
box.width = Math.max(self.resizeOptions.minWidth || 0, startSize.x + (mouse.x - startMouse.x));
}
box.height = Math.max(self.resizeOptions.minHeight || 0, startSize.y + (mouse.y - startMouse.y));
if (self.resizeOptions.aspectRatio) {
if (startAspect < 1)
box.height = box.width * startAspect;
else
box.width = box.height / startAspect;
}
self.setBounds(box, true);
if (typeof self.resizeOptions.resize == "function")
self.resizeOptions.resize.apply(self, [e]);
e.preventDefault();
e.stopPropagation();
};
// ___ mouseup
var handleMouseUp = function(e) {
iQ(gWindow)
.unbind('mousemove', handleMouseMove)
.unbind('mouseup', handleMouseUp);
if (typeof self.resizeOptions.stop == "function")
self.resizeOptions.stop.apply(self, [e]);
e.preventDefault();
e.stopPropagation();
};
// ___ handle + mousedown
iQ('<div>')
.addClass('iq-resizable-handle iq-resizable-se')
.appendTo($container)
.mousedown(function(e) {
if (!Utils.isLeftClick(e))
return;
startMouse = new Point(e.pageX, e.pageY);
startSize = self.getBounds().size();
startAspect = startSize.y / startSize.x;
if (typeof self.resizeOptions.start == "function")
self.resizeOptions.start.apply(self, [e]);
iQ(gWindow)
.mousemove(handleMouseMove)
.mouseup(handleMouseUp);
e.preventDefault();
e.stopPropagation();
});
}
} catch(e) {
Utils.log(e);
}
}
};
// ##########
// Class: Items
// Keeps track of all Items.
let Items = {
// ----------
// Function: toString
// Prints [Items] for debug use
toString: function Items_toString() {
return "[Items]";
},
// ----------
// Variable: defaultGutter
// How far apart Items should be from each other and from bounds
defaultGutter: 15,
// ----------
// Function: item
// Given a DOM element representing an Item, returns the Item.
item: function Items_item(el) {
return iQ(el).data('item');
},
// ----------
// Function: getTopLevelItems
// Returns an array of all Items not grouped into groupItems.
getTopLevelItems: function Items_getTopLevelItems() {
var items = [];
iQ('.tab, .groupItem').each(function(elem) {
var $this = iQ(elem);
var item = $this.data('item');
if (item && !item.parent && !$this.hasClass('phantom'))
items.push(item);
});
return items;
},
// ----------
// Function: getPageBounds
// Returns a <Rect> defining the area of the page <Item>s should stay within.
getPageBounds: function Items_getPageBounds() {
var width = Math.max(100, window.innerWidth);
var height = Math.max(100, window.innerHeight);
return new Rect(0, 0, width, height);
},
// ----------
// Function: getSafeWindowBounds
// Returns the bounds within which it is safe to place all non-stationary <Item>s.
getSafeWindowBounds: function Items_getSafeWindowBounds() {
// the safe bounds that would keep it "in the window"
var gutter = Items.defaultGutter;
// Here, I've set the top gutter separately, as the top of the window has its own
// extra chrome which makes a large top gutter unnecessary.
// TODO: set top gutter separately, elsewhere.
var topGutter = 5;
return new Rect(gutter, topGutter,
window.innerWidth - 2 * gutter, window.innerHeight - gutter - topGutter);
},
// ----------
// Function: arrange
// Arranges the given items in a grid within the given bounds,
// maximizing item size but maintaining standard tab aspect ratio for each
//
// Parameters:
// items - an array of <Item>s. Can be null, in which case we won't
// actually move anything.
// bounds - a <Rect> defining the space to arrange within
// options - an object with various properites (see below)
//
// Possible "options" properties:
// animate - whether to animate; default: true.
// z - the z index to set all the items; default: don't change z.
// return - if set to 'widthAndColumns', it'll return an object with the
// width of children and the columns.
// count - overrides the item count for layout purposes;
// default: the actual item count
// columns - (int) a preset number of columns to use
// dropPos - a <Point> which should have a one-tab space left open, used
// when a tab is dragged over.
//
// Returns:
// By default, an object with three properties: `rects`, the list of <Rect>s,
// `dropIndex`, the index which a dragged tab should have if dropped
// (null if no `dropPos` was specified), and the number of columns (`columns`).
// If the `return` option is set to 'widthAndColumns', an object with the
// width value of the child items (`childWidth`) and the number of columns
// (`columns`) is returned.
arrange: function Items_arrange(items, bounds, options) {
if (!options)
options = {};
var animate = "animate" in options ? options.animate : true;
var immediately = !animate;
var rects = [];
var count = options.count || (items ? items.length : 0);
if (options.addTab)
count++;
if (!count) {
let dropIndex = (Utils.isPoint(options.dropPos)) ? 0 : null;
return {rects: rects, dropIndex: dropIndex};
}
var columns = options.columns || 1;
// We'll assume for the time being that all the items have the same styling
// and that the margin is the same width around.
var itemMargin = items && items.length ?
parseInt(iQ(items[0].container).css('margin-left')) : 0;
var padding = itemMargin * 2;
var rows;
var tabWidth;
var tabHeight;
var totalHeight;
function figure() {
rows = Math.ceil(count / columns);
let validSize = TabItems.calcValidSize(
new Point((bounds.width - (padding * columns)) / columns, -1),
options);
tabWidth = validSize.x;
tabHeight = validSize.y;
totalHeight = (tabHeight * rows) + (padding * rows);
}
figure();
while (rows > 1 && totalHeight > bounds.height) {
columns++;
figure();
}
if (rows == 1) {
let validSize = TabItems.calcValidSize(new Point(tabWidth,
bounds.height - 2 * itemMargin), options);
tabWidth = validSize.x;
tabHeight = validSize.y;
}
if (options.return == 'widthAndColumns')
return {childWidth: tabWidth, columns: columns};
let initialOffset = 0;
if (UI.rtl) {
initialOffset = bounds.width - tabWidth - padding;
}
var box = new Rect(bounds.left + initialOffset, bounds.top, tabWidth, tabHeight);
var column = 0;
var dropIndex = false;
var dropRect = false;
if (Utils.isPoint(options.dropPos))
dropRect = new Rect(options.dropPos.x, options.dropPos.y, 1, 1);
for (let a = 0; a < count; a++) {
// If we had a dropPos, see if this is where we should place it
if (dropRect) {
let activeBox = new Rect(box);
activeBox.inset(-itemMargin - 1, -itemMargin - 1);
// if the designated position (dropRect) is within the active box,
// this is where, if we drop the tab being dragged, it should land!
if (activeBox.contains(dropRect))
dropIndex = a;
}
// record the box.
rects.push(new Rect(box));
box.left += (UI.rtl ? -1 : 1) * (box.width + padding);
column++;
if (column == columns) {
box.left = bounds.left + initialOffset;
box.top += box.height + padding;
column = 0;
}
}
return {rects: rects, dropIndex: dropIndex, columns: columns};
},
// ----------
// Function: unsquish
// Checks to see which items can now be unsquished.
//
// Parameters:
// pairs - an array of objects, each with two properties: item and bounds. The bounds are
// modified as appropriate, but the items are not changed. If pairs is null, the
// operation is performed directly on all of the top level items.
// ignore - an <Item> to not include in calculations (because it's about to be closed, for instance)
unsquish: function Items_unsquish(pairs, ignore) {
var pairsProvided = (pairs ? true : false);
if (!pairsProvided) {
var items = Items.getTopLevelItems();
pairs = [];
items.forEach(function(item) {
pairs.push({
item: item,
bounds: item.getBounds()
});
});
}
var pageBounds = Items.getSafeWindowBounds();
pairs.forEach(function(pair) {
var item = pair.item;
if (item == ignore)
return;
var bounds = pair.bounds;
var newBounds = new Rect(bounds);
var newSize;
if (Utils.isPoint(item.userSize))
newSize = new Point(item.userSize);
else if (item.isAGroupItem)
newSize = GroupItems.calcValidSize(
new Point(GroupItems.minGroupWidth, -1));
else
newSize = TabItems.calcValidSize(
new Point(TabItems.tabWidth, -1));
if (item.isAGroupItem) {
newBounds.width = Math.max(newBounds.width, newSize.x);
newBounds.height = Math.max(newBounds.height, newSize.y);
} else {
if (bounds.width < newSize.x) {
newBounds.width = newSize.x;
newBounds.height = newSize.y;
}
}
newBounds.left -= (newBounds.width - bounds.width) / 2;
newBounds.top -= (newBounds.height - bounds.height) / 2;
var offset = new Point();
if (newBounds.left < pageBounds.left)
offset.x = pageBounds.left - newBounds.left;
else if (newBounds.right > pageBounds.right)
offset.x = pageBounds.right - newBounds.right;
if (newBounds.top < pageBounds.top)
offset.y = pageBounds.top - newBounds.top;
else if (newBounds.bottom > pageBounds.bottom)
offset.y = pageBounds.bottom - newBounds.bottom;
newBounds.offset(offset);
if (!bounds.equals(newBounds)) {
var blocked = false;
pairs.forEach(function(pair2) {
if (pair2 == pair || pair2.item == ignore)
return;
var bounds2 = pair2.bounds;
if (bounds2.intersects(newBounds))
blocked = true;
return;
});
if (!blocked) {
pair.bounds.copy(newBounds);
}
}
return;
});
if (!pairsProvided) {
pairs.forEach(function(pair) {
pair.item.setBounds(pair.bounds);
});
}
}
};