openrat-cms

Unnamed repository; edit this file 'description' to name the repository.
Log | Files | Refs | README

Display.min.js (4510B)

      1 import { gecko, ie, ie_version, mobile, webkit } from "../util/browser.js"
      2 import { elt, eltP } from "../util/dom.js"
      3 import { scrollerGap } from "../util/misc.js"
      4 
      5 // The display handles the DOM integration, both for input reading
      6 // and content drawing. It holds references to DOM nodes and
      7 // display-related state.
      8 
      9 export function Display(place, doc, input) {
     10   let d = this
     11   this.input = input
     12 
     13   // Covers bottom-right square when both scrollbars are present.
     14   d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler")
     15   d.scrollbarFiller.setAttribute("cm-not-content", "true")
     16   // Covers bottom of gutter when coverGutterNextToScrollbar is on
     17   // and h scrollbar is present.
     18   d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler")
     19   d.gutterFiller.setAttribute("cm-not-content", "true")
     20   // Will contain the actual code, positioned to cover the viewport.
     21   d.lineDiv = eltP("div", null, "CodeMirror-code")
     22   // Elements are added to these to represent selection and cursors.
     23   d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1")
     24   d.cursorDiv = elt("div", null, "CodeMirror-cursors")
     25   // A visibility: hidden element used to find the size of things.
     26   d.measure = elt("div", null, "CodeMirror-measure")
     27   // When lines outside of the viewport are measured, they are drawn in this.
     28   d.lineMeasure = elt("div", null, "CodeMirror-measure")
     29   // Wraps everything that needs to exist inside the vertically-padded coordinate system
     30   d.lineSpace = eltP("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
     31                     null, "position: relative; outline: none")
     32   let lines = eltP("div", [d.lineSpace], "CodeMirror-lines")
     33   // Moved around its parent to cover visible view.
     34   d.mover = elt("div", [lines], null, "position: relative")
     35   // Set to the height of the document, allowing scrolling.
     36   d.sizer = elt("div", [d.mover], "CodeMirror-sizer")
     37   d.sizerWidth = null
     38   // Behavior of elts with overflow: auto and padding is
     39   // inconsistent across browsers. This is used to ensure the
     40   // scrollable area is big enough.
     41   d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;")
     42   // Will contain the gutters, if any.
     43   d.gutters = elt("div", null, "CodeMirror-gutters")
     44   d.lineGutter = null
     45   // Actual scrollable element.
     46   d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll")
     47   d.scroller.setAttribute("tabIndex", "-1")
     48   // The element in which the editor lives.
     49   d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror")
     50 
     51   // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
     52   if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0 }
     53   if (!webkit && !(gecko && mobile)) d.scroller.draggable = true
     54 
     55   if (place) {
     56     if (place.appendChild) place.appendChild(d.wrapper)
     57     else place(d.wrapper)
     58   }
     59 
     60   // Current rendered range (may be bigger than the view window).
     61   d.viewFrom = d.viewTo = doc.first
     62   d.reportedViewFrom = d.reportedViewTo = doc.first
     63   // Information about the rendered lines.
     64   d.view = []
     65   d.renderedView = null
     66   // Holds info about a single rendered line when it was rendered
     67   // for measurement, while not in view.
     68   d.externalMeasured = null
     69   // Empty space (in pixels) above the view
     70   d.viewOffset = 0
     71   d.lastWrapHeight = d.lastWrapWidth = 0
     72   d.updateLineNumbers = null
     73 
     74   d.nativeBarWidth = d.barHeight = d.barWidth = 0
     75   d.scrollbarsClipped = false
     76 
     77   // Used to only resize the line number gutter when necessary (when
     78   // the amount of lines crosses a boundary that makes its width change)
     79   d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null
     80   // Set to true when a non-horizontal-scrolling line widget is
     81   // added. As an optimization, line widget aligning is skipped when
     82   // this is false.
     83   d.alignWidgets = false
     84 
     85   d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null
     86 
     87   // Tracks the maximum line length so that the horizontal scrollbar
     88   // can be kept static when scrolling.
     89   d.maxLine = null
     90   d.maxLineLength = 0
     91   d.maxLineChanged = false
     92 
     93   // Used for measuring wheel scrolling granularity
     94   d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null
     95 
     96   // True when shift is held down.
     97   d.shift = false
     98 
     99   // Used to track whether anything happened since the context menu
    100   // was opened.
    101   d.selForContextMenu = null
    102 
    103   d.activeTouch = null
    104 
    105   input.init(d)
    106 }