[Vimperator-plugin]pdf-js mappings

pdf-js.js

/*
 * for pdf.js
 * @see https://github.com/mozilla/pdf.js
 *
 * == Mappings ==
 * {count}<C-j> : go next page
 * {count}<C-k> : go previous page
 * go           : go to {num} page
 * {count}zz    : zoom {count} % or 100%(if ommit)
 * zw           : zoom page width
 * zf           : zoom fit
 */

var viewerReg = /^chrome:\/\/pdf\.js\/content\/web\/viewer.html\?file=.*/;

var maps = [
  Map([modes.NORMAL], ["<C-j>"], "pdf.js go next page",
    function (count) {
      content.window.PDFView.page += Math.max(count, 1);
    }, {
      count: true,
      matchingUrls: viewerReg,
    }
  ),
  Map([modes.NORMAL], ["<C-k>"], "pdf.js go previous page",
    function (count) {
      content.window.PDFView.page -= Math.max(count, 1);
    }, {
      count: true,
      matchingUrls: viewerReg,
    }
  ),
  Map([modes.NORMAL], ["go"], "pdf.js go to page",
    function () {
      var pageCount = content.window.PDFView.pages.length;
      commandline.input("pdf.js go to page [1 - " + pageCount + "]", function onSubmit(res) {
        if (res) {
          let num = parseInt(res);
          if (!isNaN(num) && 0 < num && num <= pageCount) {
            content.window.PDFView.page = num;
          }
        }
      });
    }, {
      matchingUrls: viewerReg,
    }
  ),
  Map([modes.NORMAL], ["zz"], "pdf.js zoom percent",
    function (count) {
      content.window.PDFView.setScale(count ? count / 100 : 1);
    }, {
      count: true,
      matchingUrls: viewerReg,
    }
  ),
  Map([modes.NORMAL], ["zw"], "pdf.js zoom page width",
    function () {
      content.window.PDFView.parseScale("page-width");
    }, {
      matchingUrls: viewerReg,
    }),
  Map([modes.NORMAL], ["zf"], "pdf.js zoom page fit",
    function () {
      content.window.PDFView.parseScale("page-fit");
    }, {
      matchingUrls: viewerReg,
    }
  ),
];

maps.forEach(function (map) {
  mappings._addMap(map);
});