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Page Contents View Mode

The main purpose of this script is to show only the main content or page article. It is designed to be used with a bookmarklet whose URL is (no quote) "javascript:void(PCVM())". There can be up to 5 to 7 view modes depending on the layout of the web page.

当前为 2017-10-13 提交的版本，查看 最新版本。

// ==UserScript==
// @name         Page Contents View Mode
// @namespace    PageContentsViewMode
// @version      1.0.1
// @description  The main purpose of this script is to show only the main content or page article. It is designed to be used with a bookmarklet whose URL is (no quote) "javascript:void(PCVM())". There can be up to 5 to 7 view modes depending on the layout of the web page.
// @author       jcunews
// @match        *://*/*
// @grant        none
// ==/UserScript==

(function(i, j, k, l) {
  //*** Tweakable Configuration Start ***
  var minimumTextLength = 30; //in characters (in its container element)
  var minimumTextPosition = 10; //in percents (of page)
  var maximumTextPosition = 90; //in percents (of page)
  var maximumVisibilityLevel = 5;
  //*** Tweakable Configuration End ***

  var excludedElements = ["NOSCRIPT", "SCRIPT", "STYLE"];
  var bodyHTML = document.body.innerHTML, texts = [];
  function checkNode(node, i, t) {
    switch (node.nodeType) {
      case Element.ELEMENT_NODE:
        if (excludedElements.indexOf(node.tagName) < 0) {
          for (i = 0; i < node.childNodes.length; i++) {
            checkNode(node.childNodes[i]);
          }
        }
        break;
      case Element.TEXT_NODE:
        t = node.data.trim();
        if (t.length >= minimumTextLength) {
          i = (bodyHTML.indexOf(t) / bodyHTML.length) * 100;
          if ((i >= minimumTextPosition) && (i <= maximumTextPosition)) {
            texts.push({node: node, text: t, position: i, levelWeight: node.parentNode.parentNode.textContent.trim().length});
          }
        }
    }
  }
  checkNode(document.body);
  if (!texts.length) return;
  for (i = 0; i < texts.length-1; i++) {
    j = texts[i].node.parentNode.parentNode;
    k = false;
    l = i+1;
    while (l < texts.length) {
      if (texts[l].node.parentNode.parentNode === j) {
        texts.splice(l, 1);
        continue;
      } else l++;
    }
  }
  if (!texts.length) return;
  texts.sort(function(i1, i2) {
    return i2.levelWeight - i1.levelWeight;
  });
  console.log(texts);
  if (!window.PCVM) {
    window.PCVM = function(ele, lvl, node) {
      ele = document.getElementById("spaStyle");
      if (!ele) {
        ele = document.createElement("STYLE");
        ele.innerHTML = '.spaHidden{display:none!important}';
        document.head.appendChild(ele);
      }
      if (++window.PCVM.level > 999) {
        window.PCVM.level = 0;
      } else if (window.PCVM.level > maximumVisibilityLevel) {
        window.PCVM.level = 999;
      }
      lvl = 0;
      ele = texts[0].node.parentNode;
      while (ele !== document.body) {
        node = ele.previousElementSibling;
        while (node) {
          if (lvl <= window.PCVM.level) {
            node.classList.remove("spaHidden");
          } else node.classList.add("spaHidden");
          node = node.previousElementSibling;
        }
        node = ele.nextElementSibling;
        while (node) {
          if (lvl <= window.PCVM.level) {
            node.classList.remove("spaHidden");
          } else node.classList.add("spaHidden");
          node = node.nextElementSibling;
        }
        ele = ele.parentNode;
        lvl++;
      }
    };
    window.PCVM.level = 999;
  }
})();