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trimmer.js
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trimmer.js
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// MIT License
//
// Copyright (c) 2024 Juri Munkki
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
// Determine if the table is a link of page links
function isFirstTdPage(table) {
const firstTd = table.getElementsByTagName('td')[0];
return firstTd && firstTd.textContent.trim() === 'Page';
}
// Prune page links from threads with too many pages
function trimPageLinks() {
// Define the number of links to always show at the start and end
const tables = document.getElementsByTagName('table');
const startShow = 5;
const endShow = 10;
const maxMiddleLinks = 10;
let toRemove = [];
// Find the tables for each thread that has page links
for(let table of tables) {
if (isFirstTdPage(table)) {
// Calculate the number of middle links to show
const links = Array.from(table.querySelectorAll('table td a'));
const totalLinks = links.length;
const middleLinks = totalLinks - startShow - endShow;
if(middleLinks > maxMiddleLinks) {
// Schedule to remove some of the links in the middle
let visibilityThreshold = middleLinks / 2;
links.forEach((link, index) => {
if (index >= startShow && index < totalLinks - endShow) {
visibilityThreshold -= maxMiddleLinks;
if(visibilityThreshold < 0) {
visibilityThreshold += middleLinks;
}
else {
toRemove.push(link.parentNode);
}
}
});
}
}
}
toRemove.forEach(td => td.remove());
}
function isCorrectPage() {
// Regular expression to match the URL pattern
const urlPattern = /https?:\/\/(www\.)?metamorphose\.org\/thread\/index\.htp.*se0=thread&se1=index/;
return urlPattern.test(window.location.href);
}
// Check URL just in case:
if (isCorrectPage()) {
// Run the function to modify page links
trimPageLinks();
}