Text Fragments from highlight experimental feature

src/plugins/plugin.text_selection.js

@@ -188,6 +188,7 @@ export class TextSelectionPlugin extends BookReaderPlugin {
       paragEl.style.marginTop = `${newTop}px`;
       yAdded += newTop;
       textLayer.appendChild(paragEl);
+      textLayer.appendChild(document.createTextNode('\n'));
     }
     $container.append(textLayer);
     this.textSelectionManager.stopPageFlip($container);

src/plugins/url/UrlPlugin.js

@@ -156,20 +156,28 @@
     this.oldLocationHash = urlStrPath;
   }
 
+    getHash = () => {
+      const text = window.location.search.match(/(?<=[&?]text=)[^&]*/);
+      if (text) {
+        return `${window.location.hash.slice(1)}:~:text=${text[0]}`;
+      }
+      return window.location.hash.slice(1);
+    }
+
   /**
    * Get the url and check if it has changed
    * If it was changeed, update the urlState
    */
   listenForHashChanges() {
-    this.oldLocationHash = window.location.hash.substr(1);
+    this.oldLocationHash = this.getHash();
     if (this.urlLocationPollId) {
       clearInterval(this.urlLocationPollId);
       this.urlLocationPollId = null;
     }
 
     // check if the URL changes
     const updateHash = () => {
-      const newFragment = window.location.hash.substr(1);
+      const newFragment = this.getHash();
       const hasFragmentChange = newFragment != this.oldLocationHash;
 
       if (!hasFragmentChange) { return; }

src/plugins/url/plugin.url.js

@@ -25,10 +25,11 @@ jQuery.extend(BookReader.defaultOptions, {
   urlHistoryBasePath: '/',
 
   /** Only these params will be reflected onto the URL */
-  urlTrackedParams: ['page', 'search', 'mode', 'region', 'highlight', 'view'],
+  urlTrackedParams: ['page', 'search', 'mode', 'region', 'highlight', 'view', 'text'],
 
   /** If true, don't update the URL when `page == n0 (eg "/page/n0")` */
   urlTrackIndex0: false,
+  shareHighlight: null,
 });
 
 /** @override */
@@ -180,9 +181,15 @@ BookReader.prototype.urlUpdateFragment = function() {
  * @param {string} url
  * @return {string}
  * */
+
+// testing with this URL http://127.0.0.1:8000/BookReaderDemo/demo-internetarchive.html?ocaid=adventureofsherl0000unse&text=Well%2C I found my plans very seriously menaced.&q=breaking the law#page/18/mode/2up
 BookReader.prototype.urlParamsFiltersOnlySearch = function(url) {
+  const text = url.match(/(?<=&text=)[^&]*/);
   const params = new URLSearchParams(url);
-  return params.has('q') ? `?${new URLSearchParams({ q: params.get('q') })}` : '';
+  let output = '';
+  output += params.has('q') ? `?${new URLSearchParams({ q: params.get('q') })}` : '';
+  output += text ? `:~:text=${text[0]}` : '';
+  return output;
 };
 
 
@@ -195,7 +202,7 @@ BookReader.prototype.urlReadFragment = function() {
   if (urlMode === 'history') {
     return window.location.pathname.substr(urlHistoryBasePath.length);
   } else {
-    return window.location.hash.substr(1);
+    return this.urlPlugin.getHash();
   }
 };
 
@@ -210,6 +217,15 @@ export class BookreaderUrlPlugin extends BookReader {
   init() {
     if (this.options.enableUrlPlugin) {
       this.urlPlugin = new UrlPlugin(this.options);
+      const location = this.getLocationSearch();
+      if (location.includes("text=")) {
+        const extractText = location.match(/(text=[\w\d\W]*)/);
+        const textFragment = `${extractText}`;
+        this.options.shareHighlight = textFragment;
+        this.on('textLayerRendered', (_, {pageIndex, container}) => {
+          window.location.replace(`#${this.oldLocationHash}`);
+        });
+      }
       this.bind(BookReader.eventNames.PostInit, () => {
         const { urlMode } = this.options;
 

src/util/TextSelectionManager.js

@@ -2,6 +2,7 @@
 import { SelectionObserver } from "../BookReader/utils/SelectionObserver.js";
 
 export class TextSelectionManager {
+  hlightBarEl;
   options = {
     // Current Translation plugin implementation does not have words, will limit to one BRlineElement for now
     maxProtectedWords: 200,
@@ -156,17 +157,86 @@ export class TextSelectionManager {
     $(textLayer).off(".textSelectPluginHandler");
 
     $(textLayer).on("mousedown.textSelectPluginHandler", (event) => {
+      if (event.which != 1) return;
       this.mouseIsDown = true;
+      if (this.hlightBarEl) {
+        this.hlightBarEl.remove();
+        window.getSelection().empty(); // selection is checked at mouseup, cleared here to prevent button from lingering
+      }
       event.stopPropagation();
     });
 
     // Prevent page flip on click
     $(textLayer).on('mouseup.textSelectPluginHandler', (event) => {
       this.mouseIsDown = false;
       event.stopPropagation();
+      if (event.which != 1) return;
+      this.hlightBarEl?.remove();
+      if (window.getSelection().toString()) {
+        this.highlightToolbar(event);
+      } else {
+        this.hlightBarEl?.remove();
+      }
+    });
+
+    $(document.body).on('mouseup', (_) => {
+      this.hlightBarEl?.remove();
     });
   }
 
+  highlightToolbar(_) {
+    const hlButton = document.createElement('button');
+
+    if (this.hlightBarEl) {
+      this.hlightBarEl.remove();
+    }
+    this.hlightBarEl = hlButton;
+    const currentSelection = window.getSelection();
+    const start = currentSelection.anchorNode.parentElement;
+    const end = currentSelection.focusNode.parentElement; // will always be a text node
+    const height = 30;
+    const width = 60;
+    const selectionTextLayer = start.closest('.BRtextLayer');
+    const startBoundingRect = start.getBoundingClientRect();
+    const endBoundingRect = end.getBoundingClientRect();
+    let hlButtonTop = startBoundingRect.top - height;
+    let hlButtonLeft = startBoundingRect.left - width;
+    if (currentSelection.direction == 'backward') {
+      hlButtonTop = endBoundingRect.top - height;
+      hlButtonLeft = endBoundingRect.left - width;
+    }
+    hlButton.className = "textFragmentCopy";
+
+    $(hlButton).css({
+      'top': `${hlButtonTop}px`,
+      'left': `${hlButtonLeft}px`,
+      'width': `${width}px`,
+      'height': `${height}px`,
+      'position': 'absolute',
+      'z-index': 1,
+      'background': `url(..${this.br.imagesBaseURL}translate.svg)`,
+      'background-position': 'center',
+      'background-repeat': 'no-repeat',
+      'background-color': 'darksalmon',
+    });
+    $(hlButton).on('mousedown', (event) => {
+      event.stopPropagation();
+      const currentUrl = window.location;
+      const textContentParams = document.getSelection();
+      let currentParams = this.br.readQueryString();
+      if (currentParams.includes('text')) {
+        currentParams = currentParams.replace(/(text=)[\w\W\d%]+/, createParam(textContentParams, selectionTextLayer));
+      } else {
+        currentParams = `${currentParams}&${createParam(document.getSelection(), selectionTextLayer)}`;
+      }
+      navigator.clipboard.writeText(`${currentUrl.origin}${currentUrl.pathname}${currentParams}${currentUrl?.hash}`);
+    });
+
+    $(hlButton).on('mouseup', (event) => {
+      event.stopPropagation();
+    });
+    document.body.append(hlButton);
+  }
 
   _limitSelection = () => {
     const selection = window.getSelection();
@@ -206,6 +276,118 @@ export class TextSelectionManager {
   };
 }
 
+/** TODO ->
+ * Can import something that handles this more gracefully? see - https://web.dev/articles/text-fragments#:~:text=In%20its%20simplest%20form%2C%20the%20syntax%20of,percent%2Dencoded%20text%20I%20want%20to%20link%20to.
+ */
+/**
+ *
+ * @param {*} text - document.getSelection()
+ * @param {*} pageLayer - anchorNode.parentElement.closest('.BRtextLayer')
+ * @returns
+ */
+export function createParam(text, pageLayer = null) {
+  const highlightedText = text.toString().replaceAll(/[\s]+/g, " ").trim().split(" ");
+  const anchorWord = text.anchorNode.textContent;
+  const focusWord = text.focusNode.textContent;
+  let textStart, textEnd; // :~:text=[prefix-,]textStart[,textEnd][,-suffix]
+  const direction = text.direction;
+
+  // Duplicated spaces in pageLayer.textContent for some reason
+  const wholePageText = pageLayer.textContent.replaceAll("  ", " ");
+  if (direction == 'backward') {
+    textStart = focusWord.replaceAll(/[\s]+/g, "") ? focusWord : highlightedText[0];
+    textEnd = anchorWord.replaceAll(/[\s]+/g, "") ? anchorWord : highlightedText[highlightedText.length - 1];
+  } else {
+    textStart = anchorWord.replaceAll(/[\s]+/g, "") ? anchorWord : highlightedText[0];
+    textEnd = focusWord.replaceAll(/[\s]+/g, "") ? focusWord : highlightedText[highlightedText.length - 1];
+  }
+
+  const escapedStart = RegExp.escape(textStart);
+  const escapedEnd = RegExp.escape(textEnd);
+  const testRegExp = new RegExp(String.raw`(?=(${escapedStart}).*?(?:(${escapedEnd})))`, "gi");
+
+  const foundMatches = wholePageText.matchAll(testRegExp).toArray();
+  if (foundMatches.length == 1) {
+    return `text=${textStart},${textEnd}`;
+  }
+  const preStartRange = document.createRange();
+  const postEndRange = document.createRange();
+  if (direction == 'backward') {
+    preStartRange.setStart(pageLayer.firstElementChild, 0);
+    preStartRange.setEnd(text.focusNode, 0);
+
+    postEndRange.setStart(text.anchorNode, text.anchorNode.textContent.length);
+    postEndRange.setEnd(pageLayer.lastElementChild, pageLayer.lastElementChild.childElementCount);
+
+  } else {
+    preStartRange.setStart(pageLayer.firstElementChild, 0);
+    preStartRange.setEnd(text.anchorNode, 0);
+
+    postEndRange.setStart(text.focusNode, text.focusNode.textContent.length);
+    postEndRange.setEnd(pageLayer.lastElementChild, pageLayer.lastElementChild.childElementCount);
+  }
+
+  const startRegex = new RegExp(String.raw`(\s+\S+){1,3}\s*?$`);
+  const endRegex = new RegExp(String.raw`^\S*?(\s+\S+){1,3}`);
+  // prefixes/suffixes cannot contain paragraph breaks
+  const textFragmentArr = [];
+  let [prefixes, suffixes] = ["", ""];
+  if (preStartRange.toString().length !== 0) {
+    if (!preStartRange.toString().match(startRegex)) {
+      prefixes = `${preStartRange.toString()
+        .replace(/[ ]+/g, " ")
+        .trim()
+        .replace(/^[^\n]*\n/gm, "")}-`;
+    } else {
+      prefixes = `${preStartRange.toString().match(startRegex)[0]
+        .replace(/[ ]+/g, " ")
+        .trim()
+        .replace(/^[^\n]*\n/gm, "")}-`;
+    }
+    textFragmentArr.push(prefixes);
+  }
+  if (postEndRange.toString().length !== 0) {
+    if (!postEndRange.toString().match(endRegex)) {
+      suffixes = `-${postEndRange.toString()
+        .replace(/[ ]+/g, " ")
+        .trim()
+        .replace(/^[^\n]*\n/gm, "")}`;
+    } else {
+      suffixes = `-${postEndRange.toString().match(endRegex)[0]
+        .replace(/[ ]+/g, " ")
+        .trim()
+        .replace(/\n[^\n]*$/gm, "")}`;
+    }
+  }
+
+  if (textStart === textEnd) {
+    textEnd = "";
+  }
+
+  const selection = window.getSelection();
+  const constructHighlight = selection.toString().replace(/[\s]+/g, " ").split(/[ ]+/g);
+  if (direction == 'backward') {
+    constructHighlight[0] = selection.focusNode.textContent;
+    constructHighlight[constructHighlight.length - 1] = selection.anchorNode.textContent;
+  } else {
+    constructHighlight[0] = selection.anchorNode.textContent;
+    constructHighlight[constructHighlight.length - 1] = selection.focusNode.textContent;
+  }
+  const fullHighlight = constructHighlight.join(" ").trim().split(" ");
+  let quote = [fullHighlight.join(" ")];
+  if (fullHighlight.length > 6) {
+    if (direction == 'backward') {
+      quote = [fullHighlight.slice(0, 3).join(" "), fullHighlight.slice(-3).join(" ")];
+    } else {
+      quote = [fullHighlight.slice(0, 3).join(" "), fullHighlight.slice(-3).join(" ")];
+    }
+  }
+  textFragmentArr.push(...quote);
+  if (suffixes.length != 0) {
+    textFragmentArr.push(suffixes);
+  }
+  return `text=${textFragmentArr.map(encodeURIComponent).join(',')}`;
+}
 /**
  * @template T
  * Get the i-th element of an iterable
@@ -280,3 +462,37 @@ export function* walkBetweenNodes(start, end) {
 
   yield* walk(start);
 }
+
+
+export class TextFragment {
+  /** @type {string | null} */
+  prefix
+  /** @type {string} */
+  textStart
+  /** @type {string | null} */
+  textEnd
+  /** @type {string | null} */
+  suffix
+
+  /** @returns {string} */
+  toString() {}
+
+  /**
+   * @param {string} urlString
+   * @returns {TextFragment}
+   **/
+  static fromString(urlString) {}
+
+  /**
+   * @param {Selection} selection
+   * @returns {TextFragment}
+   */
+  static fromSelection(selection) {}
+}
+
+
+/**
+ * Prefix “That is easily-,
+ * textstart %20 got.” “ And%20
+ * Suffix - help.”“That is
+*/

tests/jest/plugins/url/plugin.url.test.js

@@ -42,6 +42,7 @@ describe('Plugin: URL controller', () => {
   });
 
   test('initializes polling for url changes if using hash', () => {
+    BookReader.prototype.urlReadFragment = jest.fn(() => '/page/2/mode/1up');
     BookReader.prototype.urlStartLocationPolling = jest.fn();
     br.init();