// Modify page
/* jshint esversion:6, -W097 */
/* jslint esversion:6 */
/* global GrammalectePanel, GrammalecteButton, GrammalecteTextFormatter, GrammalecteGrammarChecker, GrammalecteMessageBox, showError, MutationObserver, chrome, document, console */
/*
JS sucks (again, and again, and again, and again…)
Not possible to load content from within the extension:
https://bugzilla.mozilla.org/show_bug.cgi?id=1267027
No SharedWorker, no images allowed for now…
*/
"use strict";
function showError (e) {
console.error(e.fileName + "\n" + e.name + "\nline: " + e.lineNumber + "\n" + e.message);
}
// Chrome don’t follow the W3C specification:
// https://browserext.github.io/browserext/
let bChrome = false;
if (typeof(browser) !== "object") {
var browser = chrome;
bChrome = true;
}
/*
function loadImage (sContainerClass, sImagePath) {
let xRequest = new XMLHttpRequest();
xRequest.open('GET', browser.extension.getURL("")+sImagePath, false);
xRequest.responseType = "arraybuffer";
xRequest.send();
let blobTxt = new Blob([xRequest.response], {type: 'image/png'});
let img = document.createElement('img');
img.src = (URL || webkitURL).createObjectURL(blobTxt); // webkitURL is obsolete: https://bugs.webkit.org/show_bug.cgi?id=167518
Array.filter(document.getElementsByClassName(sContainerClass), function (oElem) {
oElem.appendChild(img);
});
}
*/
const oGrammalecte = {
nButton: 0,
lButton: [],
oTFPanel: null,
oGCPanel: null,
oMessageBox: null,
xRightClickedNode: null,
xObserver: null,
sExtensionUrl: null,
oOptions: null,
listenRightClick: function () {
// Node where a right click is done
// Bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=1325814
document.addEventListener('contextmenu', (xEvent) => {
this.xRightClickedNode = xEvent.target;
}, true);
},
clearRightClickedNode: function () {
this.xRightClickedNode = null;
},
createButtons: function () {
if (bChrome) {
browser.storage.local.get("ui_options", this._createButtons.bind(this));
return;
}
browser.storage.local.get("ui_options").then(this._createButtons.bind(this), showError);
},
_createButtons: function (oOptions) {
if (oOptions.hasOwnProperty("ui_options")) {
this.oOptions = oOptions.ui_options;
if (this.oOptions.textarea) {
for (let xNode of document.getElementsByTagName("textarea")) {
if (xNode.style.display !== "none" && xNode.style.visibility !== "hidden" && xNode.getAttribute("spellcheck") !== "false") {
this.lButton.push(new GrammalecteButton(this.nButton, xNode));
this.nButton += 1;
}
}
}
if (this.oOptions.editablenode) {
for (let xNode of document.querySelectorAll("[contenteditable]")) {
this.lButton.push(new GrammalecteButton(this.nButton, xNode));
this.nButton += 1;
}
}
}
},
observePage: function () {
// When a textarea is added via jascript we add the menu
let that = this;
this.xObserver = new MutationObserver(function (mutations) {
mutations.forEach(function (mutation) {
for (let i = 0; i < mutation.addedNodes.length; i++){
if (mutation.addedNodes[i].tagName == "TEXTAREA") {
if (that.oOptions === null || that.oOptions.textarea) {
oGrammalecte.lButton.push(new GrammalecteButton(oGrammalecte.nButton, mutation.addedNodes[i]));
oGrammalecte.nButton += 1;
}
} else if (mutation.addedNodes[i].getElementsByTagName) {
if (that.oOptions === null || that.oOptions.textarea) {
for (let xNode of mutation.addedNodes[i].getElementsByTagName("textarea")) {
oGrammalecte.lButton.push(new GrammalecteButton(oGrammalecte.nButton, xNode));
oGrammalecte.nButton += 1;
}
}
}
}
});
});
this.xObserver.observe(document.body, { childList: true, subtree: true });
},
rescanPage: function () {
if (this.oTFPanel !== null) { this.oTFPanel.hide(); }
if (this.oGCPanel !== null) { this.oGCPanel.hide(); }
for (let oMenu of this.lButton) {
oMenu.deleteNodes();
}
this.lButton.length = 0; // to clear an array
this.listenRightClick();
this.createButtons();
},
createTFPanel: function () {
if (this.oTFPanel === null) {
this.oTFPanel = new GrammalecteTextFormatter("grammalecte_tf_panel", "Formateur de texte", 760, 595, false);
this.oTFPanel.insertIntoPage();
}
},
createGCPanel: function () {
if (this.oGCPanel === null) {
this.oGCPanel = new GrammalecteGrammarChecker("grammalecte_gc_panel", "Grammalecte", 540, 700);
this.oGCPanel.insertIntoPage();
}
},
createMessageBox: function () {
if (this.oMessageBox === null) {
this.oMessageBox = new GrammalecteMessageBox("grammalecte_message_box", "Grammalecte");
this.oMessageBox.insertIntoPage();
}
},
startGCPanel: function (what, bCheckText=true) {
this.createGCPanel();
this.oGCPanel.clear();
this.oGCPanel.show();
this.oGCPanel.showEditor();
this.oGCPanel.start(what);
this.oGCPanel.startWaitIcon();
if (what && bCheckText) {
let sText = this.oGCPanel.oTextControl.getText();
xGrammalectePort.postMessage({
sCommand: "parseAndSpellcheck",
dParam: {sText: sText, sCountry: "FR", bDebug: false, bContext: false},
dInfo: (what.nodeType && what.nodeType === 1) ? {sTextAreaId: what.id} : {}
});
}
},
showMessage: function (sMessage) {
this.createMessageBox();
this.oMessageBox.show();
this.oMessageBox.setMessage(sMessage);
},
getPageText: function () {
let sPageText = document.body.innerText;
let nPos = sPageText.indexOf("__grammalecte_panel__");
if (nPos >= 0) {
sPageText = sPageText.slice(0, nPos).normalize("NFC");
}
return sPageText;
},
createNode: function (sType, oAttr, oDataset=null) {
try {
let xNode = document.createElement(sType);
Object.assign(xNode, oAttr);
if (oDataset) {
Object.assign(xNode.dataset, oDataset);
}
return xNode;
}
catch (e) {
showError(e);
}
},
createStyle: function (sLinkCss, sLinkId=null, xNodeToAppendTo=null) {
try {
let xNode = document.createElement("link");
Object.assign(xNode, {
rel: "stylesheet",
type: "text/css",
media: "all",
href: this.sExtensionUrl + sLinkCss
});
if (sLinkId) {
Object.assign(xNode, {id: sLinkId});
}
if (xNodeToAppendTo) {
xNodeToAppendTo.appendChild(xNode);
}
return xNode;
}
catch (e) {
showError(e);
}
},
getCaretPosition (xElement) {
// JS awfulness again.
// recepie from https://stackoverflow.com/questions/4811822/get-a-ranges-start-and-end-offsets-relative-to-its-parent-container
let nCaretOffsetStart = 0;
let nCaretOffsetEnd = 0;
let xSelection = window.getSelection();
if (xSelection.rangeCount > 0) {
let xRange = xSelection.getRangeAt(0);
let xPreCaretRange = xRange.cloneRange();
xPreCaretRange.selectNodeContents(xElement);
xPreCaretRange.setEnd(xRange.endContainer, xRange.endOffset);
nCaretOffsetStart = xPreCaretRange.toString().length;
nCaretOffsetEnd = nCaretOffsetStart + xRange.toString().length;
}
return [nCaretOffsetStart, nCaretOffsetEnd];
// for later: solution with multilines text
// https://stackoverflow.com/questions/4811822/get-a-ranges-start-and-end-offsets-relative-to-its-parent-container/4812022
},
setCaretPosition (xElement, nCaretOffsetStart, nCaretOffsetEnd) {
// JS awfulness again.
// recipie from https://stackoverflow.com/questions/6249095/how-to-set-caretcursor-position-in-contenteditable-element-div
let iChar = 0;
let xRange = document.createRange();
xRange.setStart(xElement, 0);
xRange.collapse(true);
let lNode = [xElement];
let xNode;
let bFoundStart = false;
let bStop = false;
while (!bStop && (xNode = lNode.pop())) {
if (xNode.nodeType == 3) { // Node.TEXT_NODE
let iNextChar = iChar + xNode.length;
if (!bFoundStart && nCaretOffsetStart >= iChar && nCaretOffsetStart <= iNextChar) {
xRange.setStart(xNode, nCaretOffsetStart - iChar);
bFoundStart = true;
}
if (bFoundStart && nCaretOffsetEnd >= iChar && nCaretOffsetEnd <= iNextChar) {
xRange.setEnd(xNode, nCaretOffsetEnd - iChar);
bStop = true;
}
iChar = iNextChar;
} else {
let i = xNode.childNodes.length;
while (i--) {
lNode.push(xNode.childNodes[i]);
}
}
}
let xSelection = window.getSelection();
xSelection.removeAllRanges();
xSelection.addRange(xRange);
}
};
/*
Connexion to the background
*/
let xGrammalectePort = browser.runtime.connect({name: "content-script port"});
xGrammalectePort.onMessage.addListener(function (oMessage) {
let {sActionDone, result, dInfo, bEnd, bError} = oMessage;
switch (sActionDone) {
case "init":
oGrammalecte.sExtensionUrl = oMessage.sUrl;
// Start
oGrammalecte.listenRightClick();
oGrammalecte.createButtons();
oGrammalecte.observePage();
break;
case "parseAndSpellcheck":
if (!bEnd) {
oGrammalecte.oGCPanel.addParagraphResult(result);
} else {
oGrammalecte.oGCPanel.stopWaitIcon();
}
break;
case "parseAndSpellcheck1":
oGrammalecte.oGCPanel.refreshParagraph(dInfo.sParagraphId, result);
break;
case "getListOfTokens":
if (!bEnd) {
oGrammalecte.oGCPanel.addListOfTokens(result);
} else {
oGrammalecte.oGCPanel.stopWaitIcon();
}
break;
case "getSpellSuggestions":
oGrammalecte.oGCPanel.oTooltip.setSpellSuggestionsFor(result.sWord, result.aSugg, result.iSuggBlock, dInfo.sErrorId);
break;
case "getVerb":
if (dInfo.bStart) {
oGrammalecte.oGCPanel.conjugateWith(result.oVerb, result.oConjTable);
} else {
oGrammalecte.oGCPanel.displayConj(result.oConjTable);
}
break;
/*
Commands received from the context menu
(Context menu are initialized in background)
*/
// Grammar checker commands
case "grammar_checker_editable":
if (oGrammalecte.xRightClickedNode !== null) {
oGrammalecte.startGCPanel(oGrammalecte.xRightClickedNode);
} else {
oGrammalecte.showMessage("Erreur. Le node sur lequel vous avez cliqué n’a pas pu être identifié. Sélectionnez le texte à corriger et relancez le correcteur via le menu contextuel.");
}
break;
case "grammar_checker_page":
oGrammalecte.startGCPanel(oGrammalecte.getPageText());
break;
case "grammar_checker_selection":
oGrammalecte.startGCPanel(result, false); // result is the selected text
// selected text is sent to the GC worker in the background script.
break;
// rescan page command
case "rescanPage":
oGrammalecte.rescanPage();
break;
}
});
/*
Other messages from background
*/
browser.runtime.onMessage.addListener(function (oMessage) {
let {sActionRequest} = oMessage;
let xActiveNode = document.activeElement;
switch (sActionRequest) {
/*
Commands received from the keyboard (shortcuts)
*/
case "shortcutGrammarChecker":
if (xActiveNode && (xActiveNode.tagName == "TEXTAREA" || xActiveNode.tagName == "INPUT" || xActiveNode.isContentEditable)) {
oGrammalecte.startGCPanel(xActiveNode);
} else {
oGrammalecte.startGCPanel(oGrammalecte.getPageText());
}
break;
default:
console.log("[Content script] Unknown command: " + sActionDone);
}
});