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scrollpastend.min.js (1581B)

      1 // CodeMirror, copyright (c) by Marijn Haverbeke and others
      2 // Distributed under an MIT license: http://codemirror.net/LICENSE
      3 
      4 (function(mod) {
      5   if (typeof exports == "object" && typeof module == "object") // CommonJS
      6     mod(require("../../lib/codemirror"));
      7   else if (typeof define == "function" && define.amd) // AMD
      8     define(["../../lib/codemirror"], mod);
      9   else // Plain browser env
     10     mod(CodeMirror);
     11 })(function(CodeMirror) {
     12   "use strict";
     13 
     14   CodeMirror.defineOption("scrollPastEnd", false, function(cm, val, old) {
     15     if (old && old != CodeMirror.Init) {
     16       cm.off("change", onChange);
     17       cm.off("refresh", updateBottomMargin);
     18       cm.display.lineSpace.parentNode.style.paddingBottom = "";
     19       cm.state.scrollPastEndPadding = null;
     20     }
     21     if (val) {
     22       cm.on("change", onChange);
     23       cm.on("refresh", updateBottomMargin);
     24       updateBottomMargin(cm);
     25     }
     26   });
     27 
     28   function onChange(cm, change) {
     29     if (CodeMirror.changeEnd(change).line == cm.lastLine())
     30       updateBottomMargin(cm);
     31   }
     32 
     33   function updateBottomMargin(cm) {
     34     var padding = "";
     35     if (cm.lineCount() > 1) {
     36       var totalH = cm.display.scroller.clientHeight - 30,
     37           lastLineH = cm.getLineHandle(cm.lastLine()).height;
     38       padding = (totalH - lastLineH) + "px";
     39     }
     40     if (cm.state.scrollPastEndPadding != padding) {
     41       cm.state.scrollPastEndPadding = padding;
     42       cm.display.lineSpace.parentNode.style.paddingBottom = padding;
     43       cm.off("refresh", updateBottomMargin);
     44       cm.setSize();
     45       cm.on("refresh", updateBottomMargin);
     46     }
     47   }
     48 });