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//
// pgAdmin 4 - PostgreSQL Tools
//
// Copyright (C) 2013 - 2024, The pgAdmin Development Team
// This software is released under the PostgreSQL Licence
//
//////////////////////////////////////////////////////////////
/* Ref: https://github.com/heygrady/Units/blob/master/Length.js */
let testElem = document.createElement('test'),
docElement = document.documentElement,
defaultView = document.defaultView,
getComputedStyle = defaultView?.getComputedStyle,
computedValueBug,
runit = /^(-?[\d+\.\-]+)([a-z]+|%)$/i,
convert = {},
conversions = [1 / 25.4, 1 / 2.54, 1 / 72, 1 / 6],
units = ['mm', 'cm', 'pt', 'pc', 'in', 'mozmm'],
i = 6; // units.length
// add the test element to the dom
docElement.appendChild(testElem);
// test for the WebKit getComputedStyle bug
// @see http://bugs.jquery.com/ticket/10639
if (getComputedStyle) {
// add a percentage margin and measure it
testElem.style.marginTop = '1%';
computedValueBug = getComputedStyle(testElem).marginTop === '1%';
}
// pre-calculate absolute unit conversions
while (i--) {
convert[units[i] + 'toPx'] = conversions[i] ? conversions[i] * convert.inToPx : toPx('1' + units[i], null, false, testElem);
}
// remove the test element from the DOM and delete it
docElement.removeChild(testElem);
testElem = undefined;
// convert a value to pixels
export default function toPx(value, prop, force, el) {
let elem = document.createElement('div');
if(el) {
elem = el;
} else {
elem = document.createElement('div');
document.body.appendChild(elem);
}
// use width as the default property, or specify your own
prop = prop || 'width';
var style,
inlineValue,
ret,
unit = (value.match(runit) || [])[2],
conversion = unit === 'px' ? 1 : convert[unit + 'toPx'],
rem = /r?em/i;
if (conversion || rem.test(unit) && !force) {
// calculate known conversions immediately
// find the correct element for absolute units or rem or fontSize + em or em
elem = conversion ? elem : unit === 'rem' ? docElement : prop === 'fontSize' ? elem.parentNode || elem : elem;
// use the pre-calculated conversion or fontSize of the element for rem and em
conversion = conversion || parseFloat(curCSS(elem, 'fontSize'));
// multiply the value by the conversion
ret = parseFloat(value) * conversion;
} else {
// begin "the awesome hack by Dean Edwards"
// @see http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
// remember the current style
style = elem.style;
inlineValue = style[prop];
// set the style on the target element
try {
style[prop] = value;
} catch (e) {
// IE 8 and below throw an exception when setting unsupported units
return 0;
}
// read the computed value
// if style is nothing we probably set an unsupported unit
ret = !style[prop] ? 0 : parseFloat(curCSS(elem, prop));
// reset the style back to what it was or blank it out
style[prop] = inlineValue !== undefined ? inlineValue : null;
}
// return a number
if(!el) document.body.removeChild(elem);
return ret;
}
// return the computed value of a CSS property
function curCSS(elem, prop) {
var value,
pixel,
unit,
rvpos = /^(top|bottom)/,
outerProp = ['paddingTop', 'paddingBottom', 'borderTop', 'borderBottom'],
innerHeight,
parent,
i = 4; // outerProp.length
if (getComputedStyle) {
// FireFox, Chrome/Safari, Opera and IE9+
value = getComputedStyle(elem)[prop];
} else if (pixel == elem.style['pixel' + prop.charAt(0).toUpperCase() + prop.slice(1)]) {
// IE and Opera support pixel shortcuts for top, bottom, left, right, height, width
// WebKit supports pixel shortcuts only when an absolute unit is used
value = pixel + 'px';
} else if (prop === 'fontSize') {
// correct IE issues with font-size
// @see http://bugs.jquery.com/ticket/760
value = toPx(elem, '1em', 'left', 1) + 'px';
} else {
// IE 8 and below return the specified style
value = elem.currentStyle[prop];
}
// check the unit
unit = (value.match(runit) || [])[2];
if (unit === '%' && computedValueBug) {
// WebKit won't convert percentages for top, bottom, left, right, margin and text-indent
if (rvpos.test(prop)) {
// Top and bottom require measuring the innerHeight of the parent.
innerHeight = (parent = elem.parentNode || elem).offsetHeight;
while (i--) {
innerHeight -= parseFloat(curCSS(parent, outerProp[i]));
}
value = parseFloat(value) / 100 * innerHeight + 'px';
} else {
// This fixes margin, left, right and text-indent
// @see https://bugs.webkit.org/show_bug.cgi?id=29084
// @see http://bugs.jquery.com/ticket/10639
value = toPx(elem, value);
}
} else if ((value === 'auto' || (unit && unit !== 'px')) && getComputedStyle) {
// WebKit and Opera will return auto in some cases
// Firefox will pass back an unaltered value when it can't be set, like top on a static element
value = 0;
} else if (unit && unit !== 'px' && !getComputedStyle) {
// IE 8 and below won't convert units for us
// try to convert using a prop that will return pixels
// this will be accurate for everything (except font-size and some percentages)
value = toPx(elem, value) + 'px';
}
return value;
}
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