Function onContextMenu

GUI/codemirror/lib/codemirror.js:3137–3205

(cm, e)

  // textarea (making it as unobtrusive as possible) to let the
  // right-click take effect on it.
  function onContextMenu(cm, e) {
    if (signalDOMEvent(cm, e, "contextmenu")) return;
    var display = cm.display;
    if (eventInWidget(display, e) || contextMenuInGutter(cm, e)) return;

    var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
    if (!pos || presto) return; // Opera is difficult.

    // Reset the current text selection only if the click is done outside of the selection
    // and 'resetSelectionOnContextMenu' option is true.
    var reset = cm.options.resetSelectionOnContextMenu;
    if (reset && cm.doc.sel.contains(pos) == -1)
      operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll);

    var oldCSS = display.input.style.cssText;
    display.inputDiv.style.position = "absolute";
    display.input.style.cssText = "position: fixed; width: 30px; height: 30px; top: " + (e.clientY - 5) +
      "px; left: " + (e.clientX - 5) + "px; z-index: 1000; background: " +
      (ie ? "rgba(255, 255, 255, .05)" : "transparent") +
      "; outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);";
    focusInput(cm);
    resetInput(cm);
    // Adds "Select all" to context menu in FF
    if (!cm.somethingSelected()) display.input.value = display.prevInput = " ";
    display.selForContextMenu = cm.doc.sel;

    // Select-all will be greyed out if there's nothing to select, so
    // this adds a zero-width space so that we can later check whether
    // it got selected.
    function prepareSelectAllHack() {
      if (display.input.selectionStart != null) {
        var selected = cm.somethingSelected();
        var extval = display.input.value = "\u200b" + (selected ? display.input.value : "");
        display.prevInput = selected ? "" : "\u200b";
        display.input.selectionStart = 1; display.input.selectionEnd = extval.length;
      }
    }
    function rehide() {
      display.inputDiv.style.position = "relative";
      display.input.style.cssText = oldCSS;
      if (ie_upto8) display.scrollbarV.scrollTop = display.scroller.scrollTop = scrollPos;
      slowPoll(cm);

      // Try to detect the user choosing select-all
      if (display.input.selectionStart != null) {
        if (!ie || ie_upto8) prepareSelectAllHack();
        clearTimeout(detectingSelectAll);
        var i = 0, poll = function() {
          if (display.selForContextMenu == cm.doc.sel && display.input.selectionStart == 0)
            operation(cm, commands.selectAll)(cm);
          else if (i++ < 10) detectingSelectAll = setTimeout(poll, 500);
          else resetInput(cm);
        };
        detectingSelectAll = setTimeout(poll, 200);
      }
    }

    if (ie && !ie_upto8) prepareSelectAllHack();