File modules/editor/codemirror/src/util/feature_detection.min.js

Last commit: Tue May 22 22:39:54 2018 +0200	Jan Dankert	Fix für PHP 7.2: 'Object' darf nun nicht mehr als Klassennamen verwendet werden. AUCH NICHT IN EINEM NAMESPACE! WTF, wozu habe ich das in einen verfickten Namespace gepackt? Wozu soll der sonst da sein??? Amateure. Daher nun notgedrungen unbenannt in 'BaseObject'.


     1 import { elt, range, removeChildren, removeChildrenAndAdd } from "./dom.js"
     2 import { ie, ie_version } from "./browser.js"
     3 
     4 // Detect drag-and-drop
     5 export let dragAndDrop = function() {
     6   // There is *some* kind of drag-and-drop support in IE6-8, but I
     7   // couldn't get it to work yet.
     8   if (ie && ie_version < 9) return false
     9   let div = elt('div')
    10   return "draggable" in div || "dragDrop" in div
    11 }()
    12 
    13 let zwspSupported
    14 export function zeroWidthElement(measure) {
    15   if (zwspSupported == null) {
    16     let test = elt("span", "\u200b")
    17     removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]))
    18     if (measure.firstChild.offsetHeight != 0)
    19       zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8)
    20   }
    21   let node = zwspSupported ? elt("span", "\u200b") :
    22     elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px")
    23   node.setAttribute("cm-text", "")
    24   return node
    25 }
    26 
    27 // Feature-detect IE's crummy client rect reporting for bidi text
    28 let badBidiRects
    29 export function hasBadBidiRects(measure) {
    30   if (badBidiRects != null) return badBidiRects
    31   let txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"))
    32   let r0 = range(txt, 0, 1).getBoundingClientRect()
    33   let r1 = range(txt, 1, 2).getBoundingClientRect()
    34   removeChildren(measure)
    35   if (!r0 || r0.left == r0.right) return false // Safari returns null in some cases (#2780)
    36   return badBidiRects = (r1.right - r0.right < 3)
    37 }
    38 
    39 // See if "".split is the broken IE version, if so, provide an
    40 // alternative way to split lines.
    41 export let splitLinesAuto = "\n\nb".split(/\n/).length != 3 ? string => {
    42   let pos = 0, result = [], l = string.length
    43   while (pos <= l) {
    44     let nl = string.indexOf("\n", pos)
    45     if (nl == -1) nl = string.length
    46     let line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl)
    47     let rt = line.indexOf("\r")
    48     if (rt != -1) {
    49       result.push(line.slice(0, rt))
    50       pos += rt + 1
    51     } else {
    52       result.push(line)
    53       pos = nl + 1
    54     }
    55   }
    56   return result
    57 } : string => string.split(/\r\n?|\n/)
    58 
    59 export let hasSelection = window.getSelection ? te => {
    60   try { return te.selectionStart != te.selectionEnd }
    61   catch(e) { return false }
    62 } : te => {
    63   let range
    64   try {range = te.ownerDocument.selection.createRange()}
    65   catch(e) {}
    66   if (!range || range.parentElement() != te) return false
    67   return range.compareEndPoints("StartToEnd", range) != 0
    68 }
    69 
    70 export let hasCopyEvent = (() => {
    71   let e = elt("div")
    72   if ("oncopy" in e) return true
    73   e.setAttribute("oncopy", "return;")
    74   return typeof e.oncopy == "function"
    75 })()
    76 
    77 let badZoomedRects = null
    78 export function hasBadZoomedRects(measure) {
    79   if (badZoomedRects != null) return badZoomedRects
    80   let node = removeChildrenAndAdd(measure, elt("span", "x"))
    81   let normal = node.getBoundingClientRect()
    82   let fromRange = range(node, 0, 1).getBoundingClientRect()
    83   return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1
    84 }



Download modules/editor/codemirror/src/util/feature_detection.min.js


History
Tue, 22 May 2018 22:39:54 +0200	Jan Dankert	Fix für PHP 7.2: 'Object' darf nun nicht mehr als Klassennamen verwendet werden. AUCH NICHT IN EINEM NAMESPACE! WTF, wozu habe ich das in einen verfickten Namespace gepackt? Wozu soll der sonst da sein??? Amateure. Daher nun notgedrungen unbenannt in 'BaseObject'.