From 9a0b2b1960c2a5a6f80035820864212c05d979c6 Mon Sep 17 00:00:00 2001
From: Mark <private>
Date: Sat, 6 Apr 2024 01:51:44 +0900
Subject: [PATCH] Add random scroll amount

---
 gbppd-mini.js |  53 +++++++++++++++++-
 gbppd.js      | 150 +++++++++++++++++++++++++++-----------------------
 2 files changed, 132 insertions(+), 71 deletions(-)

diff --git a/gbppd-mini.js b/gbppd-mini.js
index 411d2b3..58276f5 100644
--- a/gbppd-mini.js
+++ b/gbppd-mini.js
@@ -1 +1,52 @@
-var gbppd=function(){let e=document.getElementById("viewport"),t=null,n=[],o=[],l=document.getElementsByClassName("overflow-scrolling"),i=l[0].scrollHeight,r=0,c="",s=function(e,t){for(let t of e)if("childList"==t.type&&(o=t.target.getElementsByTagName("img")))for(let e of o)n.push(e.src)},a=function(){(r+=700)<i?l[0].scrollBy(0,700):clearInterval(c)};return{start:function(){(t=new MutationObserver(s)).observe(e,{attributes:!0,childList:!0,subtree:!0}),c=setInterval(a,500)},finish:function(){{let e=new Set(n),o=window.open(),l=0;for(let t of e)o.document.write('<a href="'+t+'" download="page-0'+l+'">'+t+"</a><br>"),l+=1;!function(e){!function t(n){n>=e.length||(e[n].href.match(/books.google./)&&e[n].click(),setTimeout(function(){t(n+1)},500))}(0)}(o.document.getElementsByTagName("a")),t&&(t.disconnect(),t=null)}}}}();
\ No newline at end of file
+var gbppd = (function () {
+  let e = document.getElementById("viewport"),
+    t = null,
+    n = [],
+    o = [],
+    l = document.getElementsByClassName("overflow-scrolling"),
+    r = l[0].scrollHeight,
+    i = 0,
+    a = "",
+    c = function (e, t) {
+      for (let t of e)
+        if (
+          "childList" == t.type &&
+          ((o = t.target.getElementsByTagName("img")), o)
+        )
+          for (let e of o) n.push(e.src);
+    },
+    s = function () {
+      (i += Math.floor(751 * Math.random()) + 50),
+        i < r ? l[0].scrollBy(0, 800) : clearInterval(a);
+    };
+  return {
+    start: function () {
+      (t = new MutationObserver(c)),
+        t.observe(e, { attributes: !0, childList: !0, subtree: !0 }),
+        (a = setInterval(s, 500));
+    },
+    finish: function () {
+      {
+        let o = new Set(n),
+          l = window.open(),
+          r = 0;
+        for (let e of o)
+          l.document.write(
+            '<a href="' + e + '" download="page-0' + r + '">' + e + "</a><br>"
+          ),
+            (r += 1);
+        let i = l.document.getElementsByTagName("a");
+        (e = i),
+          (function t(n) {
+            n >= e.length ||
+              (e[n].href.match(/books.google./) && e[n].click(),
+              setTimeout(function () {
+                t(n + 1);
+              }, 500));
+          })(0),
+          t && (t.disconnect(), (t = null));
+      }
+      var e;
+    },
+  };
+})();
diff --git a/gbppd.js b/gbppd.js
index 82d82cf..fb8e6f8 100644
--- a/gbppd.js
+++ b/gbppd.js
@@ -1,88 +1,98 @@
-var gbppd = (function (){
-    let book = document.getElementById("viewport");
-    let observer = null;
-    let links = [];
-    let targets = [];
+var gbppd = (function () {
+  let book = document.getElementById("viewport");
+  let observer = null;
+  let links = [];
+  let targets = [];
 
-    let scroll = document.getElementsByClassName("overflow-scrolling");
-    let scrollHeight = scroll[0].scrollHeight;
-    let scrollAmount = 700;
-    let scrollCount = 0;
-    let intervalId = '';
+  let scroll = document.getElementsByClassName("overflow-scrolling");
+  let scrollHeight = scroll[0].scrollHeight;
+  let scrollAmount = 800;
+  let scrollCount = 0;
+  let intervalId = "";
 
-    let callback = function(mutationsList, observer) {
-        
-        for(let mutation of mutationsList) {
-            if (mutation.type == 'childList') {
-                
-                targets = mutation.target.getElementsByTagName("img");
+  let callback = function (mutationsList, observer) {
+    for (let mutation of mutationsList) {
+      if (mutation.type == "childList") {
+        targets = mutation.target.getElementsByTagName("img");
 
-                if(targets) {
-                    for(let target of targets){
-                        links.push(target.src);
-                    }
-                }
-            }
+        if (targets) {
+          for (let target of targets) {
+            links.push(target.src);
+          }
         }
+      }
     }
+  };
 
-    let movePage = function() {
-        scrollCount += scrollAmount;
-        if(scrollCount < scrollHeight) {
-            scroll[0].scrollBy(0, scrollAmount);
-        }else {
-            clearInterval(intervalId);
-        }
+  let movePage = function () {
+    scrollCount += Math.floor(Math.random() * (scrollAmount - 50 + 1)) + 50;
+    if (scrollCount < scrollHeight) {
+      scroll[0].scrollBy(0, scrollAmount);
+    } else {
+      clearInterval(intervalId);
     }
-    
-    let downloadAllPages = function(a) {
-        function next(i){
-            if(i >= a.length) {
-                return;
-            }
+  };
 
-            if(a[i].href.match(/books.google./)) {
-                a[i].click();
-            }
-            
-            setTimeout(function() {
-                next(i + 1);
-            }, 500);
-        }
+  let downloadAllPages = function (a) {
+    function next(i) {
+      if (i >= a.length) {
+        return;
+      }
+
+      if (a[i].href.match(/books.google./)) {
+        a[i].click();
+      }
 
-        next(0);
+      setTimeout(function () {
+        next(i + 1);
+      }, 500);
     }
-        
-    return {
 
-        start: function(){
-            observer = new MutationObserver(callback);
-            observer.observe(book, { attributes: true, childList: true, subtree: true });
-            intervalId = setInterval(movePage, 500);
-        },
+    next(0);
+  };
 
-        finish: function(){
-            {           
-                let uniqLinks = new Set(links);
-                let newWindow = window.open();
-            
-                let pageNum = 0;
-                
-                for(let link of uniqLinks) {                      
-                    newWindow.document.write('<a href="' + link + '" download="' + 'page-0' + pageNum + '">' + link + "</a>" + "<br>");                    
-                    pageNum = pageNum + 1;
-                }
+  return {
+    start: function () {
+      observer = new MutationObserver(callback);
+      observer.observe(book, {
+        attributes: true,
+        childList: true,
+        subtree: true,
+      });
+      intervalId = setInterval(movePage, 500);
+    },
 
-                let anchors = newWindow.document.getElementsByTagName("a");
+    finish: function () {
+      {
+        let uniqLinks = new Set(links);
+        let newWindow = window.open();
 
-                downloadAllPages(anchors);
+        let pageNum = 0;
 
-                if(observer) {
-                    observer.disconnect();
-                    observer = null;
-                }
-            }
+        for (let link of uniqLinks) {
+          newWindow.document.write(
+            '<a href="' +
+              link +
+              '" download="' +
+              "page-0" +
+              pageNum +
+              '">' +
+              link +
+              "</a>" +
+              "<br>"
+          );
+          pageNum = pageNum + 1;
         }
-    };
 
+        let anchors = newWindow.document.getElementsByTagName("a");
+
+        downloadAllPages(anchors);
+
+        if (observer) {
+          observer.disconnect();
+          observer = null;
+        }
+      }
+    },
+  };
 })();