tweak: move things around

24 files changed, 3537 insertions, 0 deletions

diff --git a/src/config.def.h b/src/config.def.h
new file mode 100644
index 0000000..4ba77e6
--- /dev/null
+++ b/src/config.def.h
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2022 mini-rose
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and any associated documentation
+ * files to modify, copy, merge, publish, distribute and/or
+ * sublicense copies of this sotware for their own use.
+ * This code does not come with any warranty.
+ *
+ * Author: fenze <contact@fenze.dev>
+ */
+
+#include <gdk/gdkkeysyms.h>
+
+/* See more:
+ * https://webkitgtk.org/reference/webkit2gtk/stable/class.Settings.html */
+#define WEBKIT                                           \
+	"enable-back-forward-navigation-gestures", true, \
+	"enable-developer-extras", true,                 \
+	"enable-smooth-scrolling", false
+
+#define GTK                                        \
+	"gtk-application-prefer-dark-theme", true, \
+	"gtk-enable-animations", false
+
+#define HOME "https://lite.duckduckgo.com/html/"
+#define SEARCH "https://lite.duckduckgo.com/html/?q=%s"
+#define CACHE_DIR "/home/fenze/.cache/rose"
+
+#define KEY(x) GDK_KEY_##x
+#define ZOOM 1	    /* Starting zoom level */
+#define ZOOM_VAL .1 /* Zooming value in zoomin/zoomout functions */
+#define BG_COLOR "#1E1E2E" /* or e.g., "#FEFEFE" if not using dark theme */
+#define WIDTH 500
+#define HEIGHT 400
+
+typedef enum {
+	goback,
+	goforward,
+	refresh,
+	refresh_force,
+	back_to_home,
+	toggle_fullscreen,
+	zoomin,
+	zoomout,
+	zoom_reset,
+	next_tab,
+	prev_tab,
+	close_tab,
+	show_searchbar,
+	show_finder,
+	finder_next,
+	finder_prev,
+	newtab,
+  /*prettify,*/
+	hidebar
+} func;
+
+#define SFT  1 << 0
+#define CTRL 1 << 2
+#define ALT  1 << 3
+
+static struct {
+	unsigned mod;
+	unsigned key;
+	func id;
+} keys[] = {
+    { CTRL,	   KEY(h),      goback            },
+    { CTRL,	   KEY(l),      goforward         },
+    { CTRL,	   KEY(r),      refresh	          },
+    { CTRL | SFT,  KEY(R),      refresh_force     },
+    { CTRL | SFT,  KEY(H),      back_to_home      },
+    { CTRL,	   KEY(equal),  zoomin	          },
+    { CTRL,	   KEY(minus),  zoomout	          },
+    { CTRL,	   KEY(0),      zoom_reset	  },
+    { ALT,	   KEY(h),      prev_tab	  },
+    { ALT,	   KEY(l),      next_tab	  },
+    { CTRL,	   KEY(w),      close_tab	  },
+    { 0x0,	   KEY(F11),    toggle_fullscreen },
+    { CTRL,	   KEY(e),      show_searchbar	  },
+    { CTRL,	   KEY(f),      show_finder       },
+    { CTRL,	   KEY(n),      finder_next       },
+    { CTRL | SFT,  KEY(N),      finder_prev	  },
+    { CTRL,        KEY(t),      newtab            },
+    { CTRL,        KEY(p),      prettify            },
+    { 0x0,         KEY(Escape), hidebar           }
+};
+/* For controls more akin to normal browsers, use:
+{
+    { CTRL,        KEY(h),          goback             },
+    { CTRL,        KEY(j),          goforward          },
+    { CTRL,        KEY(r),          refresh            },
+    { CTRL | SFT,  KEY(R),          refresh_force      },
+    { CTRL | SFT,  KEY(H),          back_to_home       },
+    { CTRL,        KEY(equal),      zoomin             },
+    { CTRL,        KEY(minus),      zoomout            },
+    { CTRL,        KEY(0),          zoom_reset         },
+    { CTRL,        KEY(Page_Down),  prev_tab           },
+    { CTRL,        KEY(Page_Up),    next_tab           },
+    { CTRL,        KEY(w),          close_tab          },
+    { 0x0,         KEY(F11),        toggle_fullscreen  },
+    { CTRL,        KEY(l),          show_searchbar     },
+    { CTRL,        KEY(f),          show_finder        },
+    { CTRL,        KEY(n),          finder_next        },
+    { CTRL | SFT,  KEY(N),          finder_prev        },
+    { CTRL,        KEY(p),          prettify            },
+
+};
+*/
+/* Reference for the key shorthand:
+ * <https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gdk/gdkkeysyms.h> */
diff --git a/src/config.h b/src/config.h
new file mode 100644
index 0000000..7a4e3bf
--- /dev/null
+++ b/src/config.h
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2022 Nuño Sempere.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and any associated documentation
+ * files to modify, copy, merge, publish, distribute and/or
+ * sublicense copies of this sotware for their own use.
+ * This code does not come with any warranty.
+ *
+ */
+
+#include <gdk/gdkkeysyms.h>
+#include <stdbool.h>
+
+/* See more:
+ * https://webkitgtk.org/reference/webkit2gtk/stable/class.Settings.html */
+#define WEBKIT                                                                                     \
+	"enable-back-forward-navigation-gestures", true, "enable-developer-extras", true,          \
+	    "enable-smooth-scrolling", false
+
+#define GTK "gtk-application-prefer-dark-theme", false, "gtk-enable-animations", false
+#define ROSE_HOMEPAGE true
+#define HOME ROSE_HOMEPAGE ? "file:///home/loki/Documents/core/software/fresh/C/rose-browser/rosenrot/user-scripts/ubuntu-20.04/rose-images/rose-homepage.png" : "https://lite.duckduckgo.com/html"
+#define SEARCH "https://lite.duckduckgo.com/html/?q=%s"
+#define CACHE_DIR "/home/loki/.cache/rose"
+
+#define WIDTH 1920
+#define HEIGHT 1080
+#define KEY(x) GDK_KEY_##x
+#define ZOOM 1.4  /* Starting zoom level.*/
+#define ZOOM_VAL .1 /* Zooming value in zoomin/zoomout functions */
+#define BG_COLOR "#FEFEFE" /* "FEFEFE", "#1E1E2E" */
+#define DEBUG false 
+
+typedef enum {
+	goback,
+	goforward,
+	refresh,
+	refresh_force,
+	back_to_home,
+	toggle_fullscreen,
+	zoomin,
+	zoomout,
+	zoom_reset,
+	next_tab,
+	prev_tab,
+	close_tab,
+	show_searchbar,
+	show_finder,
+	finder_next,
+	finder_prev,
+  new_tab,
+  prettify,
+  hide_bar
+} func;
+
+#define SFT  1 << 0
+#define CTRL 1 << 2
+#define ALT  1 << 3
+
+static struct {
+	unsigned mod;
+	unsigned key;
+	func id;
+} keys[] = {
+    { CTRL,        KEY(h),          goback             },
+    { CTRL,        KEY(j),          goforward          },
+    { CTRL,        KEY(r),          refresh            },
+    { CTRL | SFT,  KEY(R),          refresh_force      },
+    { CTRL | SFT,  KEY(H),          back_to_home       },
+    { CTRL,        KEY(equal),      zoomin             },
+    { CTRL,        KEY(minus),      zoomout            },
+    { CTRL,        KEY(0),          zoom_reset         },
+    { CTRL,        KEY(Page_Up),  prev_tab           },
+    { CTRL,        KEY(Page_Down),    next_tab           },
+    { CTRL,        KEY(t),          next_tab           },
+    { CTRL,        KEY(w),          close_tab          },
+    { 0x0,         KEY(F11),        toggle_fullscreen  },
+    { CTRL,        KEY(l),          show_searchbar     },
+    { CTRL,        KEY(k),          hide_bar     },
+    { CTRL,        KEY(f),          show_finder        },
+    { CTRL,        KEY(n),          finder_next        },
+    { CTRL | SFT,  KEY(N),          finder_prev        },
+    { CTRL,        KEY(p),          prettify           }
+};
+/* ^ For controls more akin to normal browsers */
+/* Reference for the key shorthand:
+ * <https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gdk/gdkkeysyms.h> */
+
+/* Old controls: {
+    { CTRL,	   KEY(h),     goback            },
+    { CTRL,	   KEY(l),     goforward         },
+    { CTRL,	   KEY(r),     refresh	         },
+    { CTRL | SFT,  KEY(R),     refresh_force     },
+    { CTRL | SFT,  KEY(H),     back_to_home      },
+    { CTRL,	   KEY(equal), zoomin	         },
+    { CTRL,	   KEY(minus), zoomout	         },
+    { CTRL,	   KEY(0),     zoom_reset	 },
+    { ALT,	   KEY(h),     prev_tab	         },
+    { CTRL,        KEY(k),     hide_searchbar    },
+    { ALT,	   KEY(l),     next_tab	         },
+    { CTRL,	   KEY(w),     close_tab	 },
+    { 0x0,	   KEY(F11),   toggle_fullscreen },
+    { CTRL,	   KEY(e),     show_searchbar	 },
+    { CTRL,	   KEY(f),     show_finder       },
+    { CTRL,	   KEY(n),     finder_next       },
+    { CTRL | SFT,  KEY(N),     finder_prev	 },
+    { CTRL,        KEY(p),     prettify          }
+};
+*/
diff --git a/src/plugins/libre_redirect/README.md b/src/plugins/libre_redirect/README.md
new file mode 100644
index 0000000..f3f58c9
--- /dev/null
+++ b/src/plugins/libre_redirect/README.md
@@ -0,0 +1,3 @@
+## About
+
+This code automatically redirects webpage to their open-source frontends. It is based on <https://libredirect.codeberg.page/>
\ No newline at end of file
diff --git a/src/plugins/libre_redirect/libre_redirect.c b/src/plugins/libre_redirect/libre_redirect.c
new file mode 100644
index 0000000..3794add
--- /dev/null
+++ b/src/plugins/libre_redirect/libre_redirect.c
@@ -0,0 +1,84 @@
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "str_replace_start.h"
+
+#define LIBRE_N 19
+
+/* Uncomment for debug */
+/* #define DEBUG */
+
+/* Inspired by https://libredirect.github.io/, but in C. */
+
+void str_init(char* str, int n)
+{
+    for (int i = 0; i < n; i++)
+        str[i] = ' ';
+    str[n] = '\0';
+} // could also use <https://manpages.ubuntu.com/manpages/impish/man3/strinit.3pub.html>
+
+int libre_redirect(const char* uri, char* output)
+{
+    int l1 = strlen(uri);
+    int l2 = strlen(output);
+    int len;
+    char tmp_uri[l2++];
+    char tmp_output[l2++];
+
+    if ((l2 - l1) < LIBRE_N) {
+#ifdef DEBUG
+        printf("Not enough memory\n");
+#endif
+        return 1; // not enough memory.
+    } else {
+        strcpy(tmp_uri, uri); // strcpy also copies the terminating '\0'
+        strcpy(tmp_output, output);
+
+        char* annoying_sites[] = {
+            "https://www.youtube.com",
+            "https://www.reddit.com",
+            "https://medium.com",
+            "https://translate.google.com",
+            // "https://forum.effectivealtruism.org",
+            "https://www.bloomberg.com",
+            "https://twitter.com"
+        };
+
+        char* alternatives[] = {
+            "https://yt.artemislena.eu",
+            "https://teddit.nunosempere.com",
+            "https://scribe.rip",
+            "https://simplytranslate.org/",
+            // "https://ea.greaterwrong.com",
+            "https://archive.is/https://www.bloomberg.com",
+            "https://nitter.net"
+        };
+
+        len = sizeof(annoying_sites) / sizeof(annoying_sites[0]);
+
+        for (int i = 0; i < len; i++) {
+            int replace_check = str_replace_start(tmp_uri, annoying_sites[i],
+                alternatives[i], output);
+            if (replace_check == 2) {
+#ifdef DEBUG
+                printf("tmp_uri: %s\n", tmp_uri);
+                printf("output: %s\n", output);
+#endif
+                return 2;
+            } else if (replace_check == 1) {
+#ifdef DEBUG
+                printf("replace_check failed\n");
+#endif
+                return 1;
+            }
+            strcpy(tmp_uri, output);
+            str_init(output, l2);
+        }
+        strcpy(output, tmp_uri);
+    }
+#ifdef DEBUG
+    printf("No match found\n\n");
+#endif
+    return 0;
+}
diff --git a/src/plugins/libre_redirect/libre_redirect.h b/src/plugins/libre_redirect/libre_redirect.h
new file mode 100644
index 0000000..150c95e
--- /dev/null
+++ b/src/plugins/libre_redirect/libre_redirect.h
@@ -0,0 +1,6 @@
+#pragma once
+
+#define LIBRE_N 19
+
+int libre_redirect(const char* uri, char* uri_filtered);
+void str_init(char* str, int n);
diff --git a/src/plugins/libre_redirect/str_replace_start.c b/src/plugins/libre_redirect/str_replace_start.c
new file mode 100644
index 0000000..d1fe083
--- /dev/null
+++ b/src/plugins/libre_redirect/str_replace_start.c
@@ -0,0 +1,65 @@
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+
+#define DEBUG false
+
+/*
+See also:
+* <https://web.archive.org/web/20160201212501/coding.debuntu.org/c-implementing-str_replace-replace-all-occurrences-substring>
+* https://github.com/irl/la-cucina/blob/master/str_replace.c
+*/
+
+int str_replace_start(const char* string, const char* target, const char* replacement, char* output)
+{
+    int l1 = strlen(string);
+    int l2 = strlen(target);
+    int l3 = strlen(replacement);
+    int l4 = strlen(output);
+    if (DEBUG)
+        printf("%d,%d,%d,%d\n", l1, l2, l3, l4);
+    // if(DEBUG) printf("%s,%s,%s,%s\n", string, target, replacement, output);
+
+    if ((l4 < (l1 - l2 + l3)) || l4 < l1) {
+        // Not enough memory in output string.
+        if (DEBUG)
+            printf("String not long enough.\n");
+        return 1;
+    }
+    /* else if(l1 < l2){
+    // Not even possible that there is a match.
+    if(DEBUG) printf("Target larger than string.\n");
+    strcpy(output, string);
+  } */
+    else {
+        if (DEBUG)
+            printf("Looking for a match for %s in %s.\n", target, string);
+        int match = true;
+        for (int i = 0; i < l2; i++) {
+            if (string[i] != target[i]) {
+                match = false;
+                break;
+            }
+        }
+        if (match) {
+            if (DEBUG)
+                printf("Found match.\n");
+            for (int i = 0; i < l3; i++) {
+                output[i] = replacement[i];
+            }
+            int counter = l3;
+            for (int i = l2; i < l1; i++) {
+                output[counter] = string[i];
+                counter++;
+            }
+            output[counter] = '\0';
+            return 2; // success
+        } else {
+            if (DEBUG)
+                printf("Did not find match.\n");
+            strcpy(output, string);
+        }
+    }
+
+    return 0;
+}
diff --git a/src/plugins/libre_redirect/str_replace_start.h b/src/plugins/libre_redirect/str_replace_start.h
new file mode 100644
index 0000000..78c79b5
--- /dev/null
+++ b/src/plugins/libre_redirect/str_replace_start.h
@@ -0,0 +1,4 @@
+#pragma once
+
+int str_replace_start(const char* string, const char* target,
+		      const char* replacement, char* output);
diff --git a/src/plugins/libre_redirect/str_replace_test/build-example.sh b/src/plugins/libre_redirect/str_replace_test/build-example.sh
new file mode 100644
index 0000000..a9f8022
--- /dev/null
+++ b/src/plugins/libre_redirect/str_replace_test/build-example.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+CC=gcc
+
+FLAGS="-std=c99 -Wall -lm"
+
+SRC=example.c
+REQS="../str_replace_start.c ../libre_redirect.c"
+
+echo -e "\n\n\n"
+$CC $FLAGS $SRC $REQS -o example
+
diff --git a/src/plugins/libre_redirect/str_replace_test/example.c b/src/plugins/libre_redirect/str_replace_test/example.c
new file mode 100644
index 0000000..b93634a
--- /dev/null
+++ b/src/plugins/libre_redirect/str_replace_test/example.c
@@ -0,0 +1,19 @@
+#include "../libre_redirect.h"
+#include <stdio.h>
+#include <string.h>
+
+int main()
+{
+    char uri[] = "https://reddit.com/r/blah";
+
+    int l = LIBRE_N + strlen(uri) + 1;
+    char uri_filtered[l];
+    str_init(uri_filtered, l);
+
+    if (!libre_redirect(uri, uri_filtered)) {
+        printf("Filtered uri: %s\n", uri_filtered);
+    } else {
+        printf("Uri: %s\n", uri);
+        // failure; do something with the original uri.
+    }
+}
diff --git a/src/plugins/readability/README.md b/src/plugins/readability/README.md
new file mode 100644
index 0000000..2a19a8e
--- /dev/null
+++ b/src/plugins/readability/README.md
@@ -0,0 +1,2 @@
+This code reimplements firefox readability mode. Code taken from <https://raw.githubusercontent.com/ushnisha/readability-reader-webextensions/master/content_scripts/tranquilize.js>
+
diff --git a/src/plugins/readability/readability b/src/plugins/readability/readability
new file mode 100755
index 0000000..2c70985
--- /dev/null
+++ b/src/plugins/readability/readability
diff --git a/src/plugins/readability/readability.c b/src/plugins/readability/readability.c
new file mode 100644
index 0000000..bc2f02f
--- /dev/null
+++ b/src/plugins/readability/readability.c
@@ -0,0 +1,30 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#define READABILITY_N 85133 + 1000
+
+void read_readability_js(char* string)
+{
+    FILE* fp = fopen("/home/loki/Documents/core/software/fresh/C/rose-browser/rosenrot/plugins/readability/readability.js", "r");
+    if (!fp) { // fp is NULL, fopen failed
+        fprintf(stderr, "Failed to open file\n");
+        string = NULL;
+        return;
+    }
+    int i = 0;
+    int c;
+    while ((c = fgetc(fp)) != EOF) {
+        string[i++] = c;
+    }
+    string[i] = '\0';
+    fclose(fp);
+}
+
+/*
+int main(){
+    char* readability_js = malloc(READABILITY_N+1);
+    read_readability_js(readability_js);
+    printf("%s", readability_js);
+    free(readability_js);
+}
+*/
diff --git a/src/plugins/readability/readability.h b/src/plugins/readability/readability.h
new file mode 100644
index 0000000..6a21a8c
--- /dev/null
+++ b/src/plugins/readability/readability.h
@@ -0,0 +1,8 @@
+#ifndef READABILITY
+#define READABILITY
+
+#define READABILITY_N 85133 + 1000
+
+void read_readability_js(char* string);
+
+#endif
diff --git a/src/plugins/readability/readability.js b/src/plugins/readability/readability.js
new file mode 100644
index 0000000..0532bba
--- /dev/null
+++ b/src/plugins/readability/readability.js
@@ -0,0 +1,2401 @@
+/*eslint-env es6:false*/
+/*
+ * Copyright (c) 2010 Arc90 Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * This code is heavily based on Arc90's readability.js (1.7.1) script
+ * available at: http://code.google.com/p/arc90labs-readability
+ */
+
+/**
+ * Public constructor.
+ * @param {HTMLDocument} doc     The document to parse.
+ * @param {Object}       options The options object.
+ */
+function Readability(doc, options) {
+  // In some older versions, people passed a URI as the first argument. Cope:
+  if (options && options.documentElement) {
+    doc = options;
+    options = arguments[2];
+  } else if (!doc || !doc.documentElement) {
+    throw new Error("First argument to Readability constructor should be a document object.");
+  }
+  options = options || {};
+
+  this._doc = doc;
+  this._docJSDOMParser = this._doc.firstChild.__JSDOMParser__;
+  this._articleTitle = null;
+  this._articleByline = null;
+  this._articleDir = null;
+  this._articleSiteName = null;
+  this._attempts = [];
+
+  // Configurable options
+  this._debug = !!options.debug;
+  this._maxElemsToParse = options.maxElemsToParse || this.DEFAULT_MAX_ELEMS_TO_PARSE;
+  this._nbTopCandidates = options.nbTopCandidates || this.DEFAULT_N_TOP_CANDIDATES;
+  this._charThreshold = options.charThreshold || this.DEFAULT_CHAR_THRESHOLD;
+  this._classesToPreserve = this.CLASSES_TO_PRESERVE.concat(options.classesToPreserve || []);
+  this._keepClasses = !!options.keepClasses;
+  this._serializer = options.serializer || function(el) {
+    return el.innerHTML;
+  };
+  this._disableJSONLD = !!options.disableJSONLD;
+
+  // Start with all flags set
+  this._flags = this.FLAG_STRIP_UNLIKELYS |
+                this.FLAG_WEIGHT_CLASSES |
+                this.FLAG_CLEAN_CONDITIONALLY;
+
+
+  // Control whether log messages are sent to the console
+  if (this._debug) {
+    let logNode = function(node) {
+      if (node.nodeType == node.TEXT_NODE) {
+        return `${node.nodeName} ("${node.textContent}")`;
+      }
+      let attrPairs = Array.from(node.attributes || [], function(attr) {
+        return `${attr.name}="${attr.value}"`;
+      }).join(" ");
+      return `<${node.localName} ${attrPairs}>`;
+    };
+    this.log = function () {
+      if (typeof dump !== "undefined") {
+        var msg = Array.prototype.map.call(arguments, function(x) {
+          return (x && x.nodeName) ? logNode(x) : x;
+        }).join(" ");
+        dump("Reader: (Readability) " + msg + "\n");
+      } else if (typeof console !== "undefined") {
+        let args = Array.from(arguments, arg => {
+          if (arg && arg.nodeType == this.ELEMENT_NODE) {
+            return logNode(arg);
+          }
+          return arg;
+        });
+        args.unshift("Reader: (Readability)");
+        console.log.apply(console, args);
+      }
+    };
+  } else {
+    this.log = function () {};
+  }
+}
+
+Readability.prototype = {
+  FLAG_STRIP_UNLIKELYS: 0x1,
+  FLAG_WEIGHT_CLASSES: 0x2,
+  FLAG_CLEAN_CONDITIONALLY: 0x4,
+
+  // https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType
+  ELEMENT_NODE: 1,
+  TEXT_NODE: 3,
+
+  // Max number of nodes supported by this parser. Default: 0 (no limit)
+  DEFAULT_MAX_ELEMS_TO_PARSE: 0,
+
+  // The number of top candidates to consider when analysing how
+  // tight the competition is among candidates.
+  DEFAULT_N_TOP_CANDIDATES: 5,
+
+  // Element tags to score by default.
+  DEFAULT_TAGS_TO_SCORE: "section,h2,h3,h4,h5,h6,p,td,pre".toUpperCase().split(","),
+
+  // The default number of chars an article must have in order to return a result
+  DEFAULT_CHAR_THRESHOLD: 500,
+
+  // All of the regular expressions in use within readability.
+  // Defined up here so we don't instantiate them repeatedly in loops.
+  REGEXPS: {
+    // NOTE: These two regular expressions are duplicated in
+    // Readability-readerable.js. Please keep both copies in sync.
+    unlikelyCandidates: /-ad-|ai2html|banner|breadcrumbs|combx|comment|community|cover-wrap|disqus|extra|footer|gdpr|header|legends|menu|related|remark|replies|rss|shoutbox|sidebar|skyscraper|social|sponsor|supplemental|ad-break|agegate|pagination|pager|popup|yom-remote/i,
+    okMaybeItsACandidate: /and|article|body|column|content|main|shadow/i,
+
+    positive: /article|body|content|entry|hentry|h-entry|main|page|pagination|post|text|blog|story/i,
+    negative: /-ad-|hidden|^hid$| hid$| hid |^hid |banner|combx|comment|com-|contact|foot|footer|footnote|gdpr|masthead|media|meta|outbrain|promo|related|scroll|share|shoutbox|sidebar|skyscraper|sponsor|shopping|tags|tool|widget/i,
+    extraneous: /print|archive|comment|discuss|e[\-]?mail|share|reply|all|login|sign|single|utility/i,
+    byline: /byline|author|dateline|writtenby|p-author/i,
+    replaceFonts: /<(\/?)font[^>]*>/gi,
+    normalize: /\s{2,}/g,
+    videos: /\/\/(www\.)?((dailymotion|youtube|youtube-nocookie|player\.vimeo|v\.qq)\.com|(archive|upload\.wikimedia)\.org|player\.twitch\.tv)/i,
+    shareElements: /(\b|_)(share|sharedaddy)(\b|_)/i,
+    nextLink: /(next|weiter|continue|>([^\|]|$)|»([^\|]|$))/i,
+    prevLink: /(prev|earl|old|new|<|«)/i,
+    tokenize: /\W+/g,
+    whitespace: /^\s*$/,
+    hasContent: /\S$/,
+    hashUrl: /^#.+/,
+    srcsetUrl: /(\S+)(\s+[\d.]+[xw])?(\s*(?:,|$))/g,
+    b64DataUrl: /^data:\s*([^\s;,]+)\s*;\s*base64\s*,/i,
+    // See: https://schema.org/Article
+    jsonLdArticleTypes: /^Article|AdvertiserContentArticle|NewsArticle|AnalysisNewsArticle|AskPublicNewsArticle|BackgroundNewsArticle|OpinionNewsArticle|ReportageNewsArticle|ReviewNewsArticle|Report|SatiricalArticle|ScholarlyArticle|MedicalScholarlyArticle|SocialMediaPosting|BlogPosting|LiveBlogPosting|DiscussionForumPosting|TechArticle|APIReference$/
+  },
+
+  UNLIKELY_ROLES: [ "menu", "menubar", "complementary", "navigation", "alert", "alertdialog", "dialog" ],
+
+  DIV_TO_P_ELEMS: new Set([ "BLOCKQUOTE", "DL", "DIV", "IMG", "OL", "P", "PRE", "TABLE", "UL" ]),
+
+  ALTER_TO_DIV_EXCEPTIONS: ["DIV", "ARTICLE", "SECTION", "P"],
+
+  PRESENTATIONAL_ATTRIBUTES: [ "align", "background", "bgcolor", "border", "cellpadding", "cellspacing", "frame", "hspace", "rules", "style", "valign", "vspace" ],
+
+  DEPRECATED_SIZE_ATTRIBUTE_ELEMS: [ "TABLE", "TH", "TD", "HR", "PRE" ],
+
+  // The commented out elements qualify as phrasing content but tend to be
+  // removed by readability when put into paragraphs, so we ignore them here.
+  PHRASING_ELEMS: [
+    // "CANVAS", "IFRAME", "SVG", "VIDEO",
+    "ABBR", "AUDIO", "B", "BDO", "BR", "BUTTON", "CITE", "CODE", "DATA",
+    "DATALIST", "DFN", "EM", "EMBED", "I", "IMG", "INPUT", "KBD", "LABEL",
+    "MARK", "MATH", "METER", "NOSCRIPT", "OBJECT", "OUTPUT", "PROGRESS", "Q",
+    "RUBY", "SAMP", "SCRIPT", "SELECT", "SMALL", "SPAN", "STRONG", "SUB",
+    "SUP", "TEXTAREA", "TIME", "VAR", "WBR"
+  ],
+
+  // These are the classes that readability sets itself.
+  CLASSES_TO_PRESERVE: [ "page" ],
+
+  // These are the list of HTML entities that need to be escaped.
+  HTML_ESCAPE_MAP: {
+    "lt": "<",
+    "gt": ">",
+    "amp": "&",
+    "quot": '"',
+    "apos": "'",
+  },
+
+  /**
+   * Run any post-process modifications to article content as necessary.
+   *
+   * @param Element
+   * @return void
+  **/
+  _postProcessContent: function(articleContent) {
+    // Readability cannot open relative uris so we convert them to absolute uris.
+    this._fixRelativeUris(articleContent);
+
+    this._simplifyNestedElements(articleContent);
+
+    if (!this._keepClasses) {
+      // Remove classes.
+      this._cleanClasses(articleContent);
+    }
+  },
+
+  /**
+   * Iterates over a NodeList, calls `filterFn` for each node and removes node
+   * if function returned `true`.
+   *
+   * If function is not passed, removes all the nodes in node list.
+   *
+   * @param NodeList nodeList The nodes to operate on
+   * @param Function filterFn the function to use as a filter
+   * @return void
+   */
+  _removeNodes: function(nodeList, filterFn) {
+    // Avoid ever operating on live node lists.
+    if (this._docJSDOMParser && nodeList._isLiveNodeList) {
+      throw new Error("Do not pass live node lists to _removeNodes");
+    }
+    for (var i = nodeList.length - 1; i >= 0; i--) {
+      var node = nodeList[i];
+      var parentNode = node.parentNode;
+      if (parentNode) {
+        if (!filterFn || filterFn.call(this, node, i, nodeList)) {
+          parentNode.removeChild(node);
+        }
+      }
+    }
+  },
+
+  /**
+   * Iterates over a NodeList, and calls _setNodeTag for each node.
+   *
+   * @param NodeList nodeList The nodes to operate on
+   * @param String newTagName the new tag name to use
+   * @return void
+   */
+  _replaceNodeTags: function(nodeList, newTagName) {
+    // Avoid ever operating on live node lists.
+    if (this._docJSDOMParser && nodeList._isLiveNodeList) {
+      throw new Error("Do not pass live node lists to _replaceNodeTags");
+    }
+    for (const node of nodeList) {
+      this._setNodeTag(node, newTagName);
+    }
+  },
+
+  /**
+   * Iterate over a NodeList, which doesn't natively fully implement the Array
+   * interface.
+   *
+   * For convenience, the current object context is applied to the provided
+   * iterate function.
+   *
+   * @param  NodeList nodeList The NodeList.
+   * @param  Function fn       The iterate function.
+   * @return void
+   */
+  _forEachNode: function(nodeList, fn) {
+    Array.prototype.forEach.call(nodeList, fn, this);
+  },
+
+  /**
+   * Iterate over a NodeList, and return the first node that passes
+   * the supplied test function
+   *
+   * For convenience, the current object context is applied to the provided
+   * test function.
+   *
+   * @param  NodeList nodeList The NodeList.
+   * @param  Function fn       The test function.
+   * @return void
+   */
+  _findNode: function(nodeList, fn) {
+    return Array.prototype.find.call(nodeList, fn, this);
+  },
+
+  /**
+   * Iterate over a NodeList, return true if any of the provided iterate
+   * function calls returns true, false otherwise.
+   *
+   * For convenience, the current object context is applied to the
+   * provided iterate function.
+   *
+   * @param  NodeList nodeList The NodeList.
+   * @param  Function fn       The iterate function.
+   * @return Boolean
+   */
+  _someNode: function(nodeList, fn) {
+    return Array.prototype.some.call(nodeList, fn, this);
+  },
+
+  /**
+   * Iterate over a NodeList, return true if all of the provided iterate
+   * function calls return true, false otherwise.
+   *
+   * For convenience, the current object context is applied to the
+   * provided iterate function.
+   *
+   * @param  NodeList nodeList The NodeList.
+   * @param  Function fn       The iterate function.
+   * @return Boolean
+   */
+  _everyNode: function(nodeList, fn) {
+    return Array.prototype.every.call(nodeList, fn, this);
+  },
+
+  /**
+   * Concat all nodelists passed as arguments.
+   *
+   * @return ...NodeList
+   * @return Array
+   */
+  _concatNodeLists: function() {
+    var slice = Array.prototype.slice;
+    var args = slice.call(arguments);
+    var nodeLists = args.map(function(list) {
+      return slice.call(list);
+    });
+    return Array.prototype.concat.apply([], nodeLists);
+  },
+
+  _getAllNodesWithTag: function(node, tagNames) {
+    if (node.querySelectorAll) {
+      return node.querySelectorAll(tagNames.join(","));
+    }
+    return [].concat.apply([], tagNames.map(function(tag) {
+      var collection = node.getElementsByTagName(tag);
+      return Array.isArray(collection) ? collection : Array.from(collection);
+    }));
+  },
+
+  /**
+   * Removes the class="" attribute from every element in the given
+   * subtree, except those that match CLASSES_TO_PRESERVE and
+   * the classesToPreserve array from the options object.
+   *
+   * @param Element
+   * @return void