/**
* Rect.js
*
* Released under LGPL License.
* Copyright (c) 1999-2015 Ephox Corp. All rights reserved
*
* License: http://www.tinymce.com/license
* Contributing: http://www.tinymce.com/contributing
*/
/**
* Contains various tools for rect/position calculation.
*
* @class tinymce.ui.Rect
*/
define("tinymce/ui/Rect", [
], function() {
"use strict";
var min = Math.min, max = Math.max, round = Math.round;
/**
* Returns the rect positioned based on the relative position name
* to the target rect.
*
* @method relativePosition
* @param {Rect} rect Source rect to modify into a new rect.
* @param {Rect} targetRect Rect to move relative to based on the rel option.
* @param {String} rel Relative position. For example: tr-bl.
*/
function relativePosition(rect, targetRect, rel) {
var x, y, w, h, targetW, targetH;
x = targetRect.x;
y = targetRect.y;
w = rect.w;
h = rect.h;
targetW = targetRect.w;
targetH = targetRect.h;
rel = (rel || '').split('');
if (rel[0] === 'b') {
y += targetH;
}
if (rel[1] === 'r') {
x += targetW;
}
if (rel[0] === 'c') {
y += round(targetH / 2);
}
if (rel[1] === 'c') {
x += round(targetW / 2);
}
if (rel[3] === 'b') {
y -= h;
}
if (rel[4] === 'r') {
x -= w;
}
if (rel[3] === 'c') {
y -= round(h / 2);
}
if (rel[4] === 'c') {
x -= round(w / 2);
}
return {x: x, y: y, w: w, h: h};
}
/**
* Tests various positions to get the most suitable one.
*
* @method findBestRelativePosition
* @param {Rect} Rect Rect to use as source.
* @param {Rect} targetRect Rect to move relative to.
* @param {Rect} constrainRect Rect to constrain within.
* @param {Array} Array of relative positions to test against.
*/
function findBestRelativePosition(rect, targetRect, constrainRect, rels) {
var pos, i;
for (i = 0; i < rels.length; i++) {
pos = relativePosition(rect, targetRect, rels[i]);
if (pos.x >= constrainRect.x && pos.x + pos.w <= constrainRect.w + constrainRect.x &&
pos.y >= constrainRect.y && pos.y + pos.h <= constrainRect.h + constrainRect.y) {
return rels[i];
}
}
}
/**
* Inflates the rect in all directions.
*
* @method inflate
* @param {Rect} rect Rect to expand.
* @param {Number} w Relative width to expand by.
* @param {Number} h Relative height to expand by.
* @return {Rect} New expanded rect.
*/
function inflate(rect, w, h) {
return {
x: rect.x - w,
y: rect.y - h,
w: rect.w + w * 2,
h: rect.h + h * 2
};
}
/**
* Returns the intersection of the specified rectangles.
*
* @method intersect
* @param {Rect} rect The first rectangle to compare.
* @param {Rect} cropRect The second rectangle to compare.
* @return {Rect} The intersection of the two rectangles or null if they don't intersect.
*/
function intersect(rect1, rect2) {
var x1, y1, x2, y2;
x1 = max(rect1.x, rect2.x);
y1 = max(rect1.y, rect2.y);
x2 = min(rect1.x + rect1.w, rect2.x + rect2.w);
y2 = min(rect1.y + rect1.h, rect2.y + rect2.h);
if (x2 - x1 < 0 || y2 - y1 < 0) {
return null;
}
return {x: x1, y: y1, w: x2 - x1, h: y2 - y1};
}
/**
* Returns a rect clamped within the specified clamp rect. This forces the
* rect to be inside the clamp rect.
*
* @method clamp
* @param {Rect} rect Rectangle to force within clamp rect.
* @param {Rect} clampRect Rectable to force within.
* @param {Boolean} fixedSize True/false if size should be fixed.
* @return {Rect} Clamped rect.
*/
function clamp(rect, clampRect, fixedSize) {
var underflowX1, underflowY1, overflowX2, overflowY2,
x1, y1, x2, y2, cx2, cy2;
x1 = rect.x;
y1 = rect.y;
x2 = rect.x + rect.w;
y2 = rect.y + rect.h;
cx2 = clampRect.x + clampRect.w;
cy2 = clampRect.y + clampRect.h;
underflowX1 = max(0, clampRect.x - x1);
underflowY1 = max(0, clampRect.y - y1);
overflowX2 = max(0, x2 - cx2);
overflowY2 = max(0, y2 - cy2);
x1 += underflowX1;
y1 += underflowY1;
if (fixedSize) {
x2 += underflowX1;
y2 += underflowY1;
x1 -= overflowX2;
y1 -= overflowY2;
}
x2 -= overflowX2;
y2 -= overflowY2;
return {x: x1, y: y1, w: x2 - x1, h: y2 - y1};
}
return {
inflate: inflate,
relativePosition: relativePosition,
findBestRelativePosition: findBestRelativePosition,
intersect: intersect,
clamp: clamp
};
});
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