Grammalecte  Changes On Branch 2eb8d827d0965b8c

        dDistTemp.clear();
        return aSugg;
    }

    _suggest (sRemain, nMaxDel=0, nDeep=0, iAddr=0, sNewWord="", bAvoidLoop=false) {
        // returns a set of suggestions
        // recursive function
        //show(nDeep, sNewWord + ":" + sRemain)
        let aSugg = new Set();
        if (sRemain == "") {
            if (this._convBytesToInteger(this.byDic.slice(iAddr, iAddr+this.nBytesArc)) & this._finalNodeMask) {
                //show(nDeep, "___" + sNewWord + "___");
                aSugg.add(sNewWord);
            }
            for (let sTail of this._getTails(iAddr)) {
                aSugg.add(sNewWord+sTail);
            }
            return aSugg;
        }

        return aTails;
    }

    _suggestWithCrushedUselessChars (sWord, nDeep=0, iAddr=0, sNewWord="", bAvoidLoop=false) {
        let aSugg = new Set();
        if (sWord.length == 0) {
            if (this._convBytesToInteger(this.byDic.slice(iAddr, iAddr+this.nBytesArc)) & this._finalNodeMask) {
                show(nDeep, "!!! " + sNewWord + " !!!");
                aSugg.add(sNewWord);
            }
            return aSugg;
        }
        let cCurrent = sWord.slice(0, 1);
        for (let [cChar, jAddr] of this._getSimilarArcsAndCrushedChars(cCurrent, iAddr)) {
            show(nDeep, cChar);
            aSugg.gl_update(this._suggestWithCrushedUselessChars(sWord.slice(1), nDeep+1, jAddr, sNewWord+cChar));
        }
        return aSugg;
    }

    * _getSimilarArcsAndCrushedChars (cChar, iAddr) {
        // generator: yield similar char of <cChar> and address of the following node

browser.runtime.onConnect.addListener(handleConnexion);


/*
    Context Menu
*/

// Editable content
browser.contextMenus.create({
    id: "rightClickLxgEditableNode",
    title: "Lexicographe (zone de texte)",
    contexts: ["editable"]
});
    id: "getListOfTokens",
    title: "Analyser",

browser.contextMenus.create({
    id: "rightClickGCEditableNode",
    title: "Correction grammaticale (zone de texte)",
    contexts: ["editable"]
});

browser.contextMenus.create({
    id: "separator_editable",
    type: "separator",
    contexts: ["editable"]
});

// Page
browser.contextMenus.create({
    id: "rightClickLxgPage",
    title: "Lexicographe (page)",
    contexts: ["all"]
});

browser.contextMenus.create({
    id: "rightClickGCPage",
    title: "Correction grammaticale (page)",
    contexts: ["all"]
});

browser.contextMenus.create({
    id: "separator_page",
    type: "separator",
    contexts: ["all"]
});

// Selected text
browser.contextMenus.create({
    id: "rightClickLxgSelectedText",
    title: "Lexicographe (sélection)",
    contexts: ["selection"]
});

browser.contextMenus.create({
    id: "parseAndSpellcheck",
    title: "Corriger",
    id: "rightClickGCSelectedText",
    title: "Correction grammaticale (sélection)",
    contexts: ["selection"]
});

browser.contextMenus.create({
    id: "separator1",
    id: "separator_selection",
    type: "separator",
    contexts: ["selection"]
});

// Conjugueur
browser.contextMenus.create({
    id: "conjugueur_window",
    title: "Conjugueur [fenêtre]",
    contexts: ["all"]
});

browser.contextMenus.create({
    id: "conjugueur_tab",
    title: "Conjugueur [onglet]",
    contexts: ["all"]
});

// Rescan page
browser.contextMenus.create({
    id: "separator2",
    id: "separator_rescan",
    type: "separator",
    contexts: ["editable"]
});

browser.contextMenus.create({
    id: "rescanPage",
    title: "Rechercher à nouveau les zones de texte",
    contexts: ["editable"]
});


browser.contextMenus.onClicked.addListener(function (xInfo, xTab) {
    // xInfo = https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/contextMenus/OnClickData
    // xTab = https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/tabs/Tab
    // confusing: no way to get the node where we click?!
    switch (xInfo.menuItemId) {
        // editable node
        // page
        case "rightClickGCEditableNode":
        case "rightClickLxgEditableNode":
        case "rightClickGCPage":
        case "rightClickLxgPage":
            sendCommandToTab(xInfo.menuItemId, xTab.id);
            break;
        // selected text
        case "rightClickGCSelectedText":
            sendCommandToTab("rightClickGCSelectedText", xTab.id);
            xGCEWorker.postMessage({
        case "parseAndSpellcheck":
            parseAndSpellcheckSelectedText(xTab.id, xInfo.selectionText);
                sCommand: "parseAndSpellcheck",
                dParam: {sText: xInfo.selectionText, sCountry: "FR", bDebug: false, bContext: false},
                dInfo: {iReturnPort: xTab.id}
            });
            break;
        case "rightClickLxgSelectedText":
            sendCommandToTab("rightClickLxgSelectedText", xTab.id);
            xGCEWorker.postMessage({
        case "getListOfTokens": 
            getListOfTokensFromSelectedText(xTab.id, xInfo.selectionText);
                sCommand: "getListOfTokens",
                dParam: {sText: xInfo.selectionText},
                dInfo: {iReturnPort: xTab.id}
            });
            break;
        // conjugueur
        case "conjugueur_window":
            openConjugueurWindow();
            break;
        case "conjugueur_tab":
            openConjugueurTab();
            break;
        // rescan page
        case "rescanPage":
            let xPort = dConnx.get(xTab.id);
            xPort.postMessage({sActionDone: "rescanPage"});
            break;
        default:
            console.log("[Background] Unknown menu id: " + xInfo.menuItemId);
            console.log(xInfo);

    if (bChrome) {
        // JS crap again. Chrome can’t store Map object.
        dOptions = helpers.mapToObject(dOptions);
    }
    browser.storage.local.set({"gc_options": dOptions});
}

function parseAndSpellcheckSelectedText (iTab, sText) {
    // send message to the tab
    let xTabPort = dConnx.get(iTab);
    xTabPort.postMessage({sActionDone: "openGCPanel", result: null, dInfo: null, bEnd: false, bError: false});
    // send command to the worker
    xGCEWorker.postMessage({
        sCommand: "parseAndSpellcheck",
        dParam: {sText: sText, sCountry: "FR", bDebug: false, bContext: false},
        dInfo: {iReturnPort: iTab}
    });
}

function sendCommandToTab (sCommand, iTab) {
function getListOfTokensFromSelectedText (iTab, sText) {
    // send message to the tab
    let xTabPort = dConnx.get(iTab);
    xTabPort.postMessage({sActionDone: "openLxgPanel", result: null, dInfo: null, bEnd: false, bError: false});
    xTabPort.postMessage({sActionDone: sCommand, result: null, dInfo: null, bEnd: false, bError: false});
    // send command to the worker
    xGCEWorker.postMessage({
        sCommand: "getListOfTokens",
        dParam: {sText: sText},
        dInfo: {iReturnPort: iTab}
    });
}

function openConjugueurTab () {
    if (bChrome) {
        browser.tabs.create({
            url: browser.extension.getURL("panel/conjugueur.html")
        });

    nMenu: 0,
    lMenu: [],

    oTFPanel: null,
    oLxgPanel: null,
    oGCPanel: null,

    xRightClickedNode: null,

    listenRightClick: function () {
        document.addEventListener('contextmenu', function (xEvent) {
            this.xRightClickedNode = xEvent.target;
        }.bind(this), true);
    },

    clearRightClickedNode: function () {
        this.xRightClickedNode = null;
    },

    createMenus: function () {
        let lNode = document.getElementsByTagName("textarea");
        for (let xNode of lNode) {
            if (xNode.style.display !== "none" && xNode.style.visibility !== "hidden") {
                this.lMenu.push(new GrammalecteMenu(this.nMenu, xNode));
                this.nMenu += 1;
            }
        }
    },

    createMenus2 () {
        let lNode = document.querySelectorAll("[contenteditable]");
        for (let xNode of lNode) {
            this.lMenu.push(new GrammalecteMenu(this.nMenu, xNode));
            this.nMenu += 1;
        }
    },

    rescanPage: function () {
        if (this.oTFPanel !== null) { this.oTFPanel.hide(); }
        if (this.oLxgPanel !== null) { this.oLxgPanel.hide(); }
        if (this.oGCPanel !== null) { this.oGCPanel.hide(); }
        for (let oMenu of this.lMenu) {
            oMenu.deleteNodes();
        }
        this.lMenu.length = 0; // to clear an array
        this.listenRightClick();
        this.createMenus();
        this.createMenus2();
    },

    createTFPanel: function () {
        if (this.oTFPanel === null) {
            this.oTFPanel = new GrammalecteTextFormatter("grammalecte_tf_panel", "Formateur de texte", 760, 600, false);
            //this.oTFPanel.logInnerHTML();
            this.oTFPanel.insertIntoPage();

    createGCPanel: function () {
        if (this.oGCPanel === null) {
            this.oGCPanel = new GrammalecteGrammarChecker("grammalecte_gc_panel", "Grammalecte", 500, 700);
            this.oGCPanel.insertIntoPage();
        }
    },

    startGCPanel: function (xNode=null) {
        oGrammalecte.createGCPanel();
        oGrammalecte.oGCPanel.clear();
        oGrammalecte.oGCPanel.show();
        oGrammalecte.oGCPanel.start(xNode);
        oGrammalecte.oGCPanel.startWaitIcon();
    },

    startLxgPanel: function () {
        oGrammalecte.createLxgPanel();
        oGrammalecte.oLxgPanel.clear();
        oGrammalecte.oLxgPanel.show();
        oGrammalecte.oLxgPanel.startWaitIcon();
    },

    getPageText: function () {
        let sPageText = document.body.innerText;
        let nPos = sPageText.indexOf("__grammalecte_panel__");
        if (nPos >= 0) {
            sPageText = sPageText.slice(0, nPos);
        }
        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);
        }
    }
}


/*
    Node where a right click is done
    Bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=1325814
*/


/*
    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;
    let sText = "";
    switch (sActionDone) {
        case "parseAndSpellcheck":
            if (!bEnd) {
                oGrammalecte.oGCPanel.addParagraphResult(result);
            } else {
                oGrammalecte.oGCPanel.stopWaitIcon();
            }

            } else {
                oGrammalecte.oLxgPanel.stopWaitIcon();
            }
            break;
        case "getSpellSuggestions":
            oGrammalecte.oGCPanel.oTooltip.setSpellSuggestionsFor(result.sWord, result.aSugg, dInfo.sErrorId);
            break;
        /*
        // Design WTF: context menus are made in background, not in content-script.
        // Commands from context menu received here to initialize panels
        case "openGCPanel":
            oGrammalecte.createGCPanel();
            oGrammalecte.oGCPanel.clear();
            oGrammalecte.oGCPanel.show();
            oGrammalecte.oGCPanel.start();
            oGrammalecte.oGCPanel.startWaitIcon();
            Commands received from the context menu
            (Context menu are initialized in background)
        */
        // Grammar checker commands
        case "rightClickGCEditableNode":
            if (oGrammalecte.xRightClickedNode !== null) {
                oGrammalecte.startGCPanel(oGrammalecte.xRightClickedNode);
                sText = (oGrammalecte.xRightClickedNode.tagName == "TEXTAREA") ? oGrammalecte.xRightClickedNode.value : oGrammalecte.xRightClickedNode.textContent;
                xGrammalectePort.postMessage({
                    sCommand: "parseAndSpellcheck",
                    dParam: {sText: sText, sCountry: "FR", bDebug: false, bContext: false},
                    dInfo: {sTextAreaId: oGrammalecte.xRightClickedNode.id}
                });
            }
            break;
        case "rightClickGCPage":
            oGrammalecte.startGCPanel();
            xGrammalectePort.postMessage({
                sCommand: "parseAndSpellcheck",
                dParam: {sText: oGrammalecte.getPageText(), sCountry: "FR", bDebug: false, bContext: false},
                dInfo: {}
            });
            break;
        case "rightClickGCSelectedText":
            oGrammalecte.startGCPanel();
            // selected text is sent to the GC worker in the background script.
            break;
        // Lexicographer commands
        case "rightClickLxgEditableNode":
            if (oGrammalecte.xRightClickedNode !== null) {
                oGrammalecte.startLxgPanel();
                sText = (oGrammalecte.xRightClickedNode.tagName == "TEXTAREA") ? oGrammalecte.xRightClickedNode.value : oGrammalecte.xRightClickedNode.textContent;
                xGrammalectePort.postMessage({
                    sCommand: "getListOfTokens",
                    dParam: {sText: sText},
                    dInfo: {sTextAreaId: oGrammalecte.xRightClickedNode.id}
                });
            }
            break;
        case "openLxgPanel":
            oGrammalecte.createLxgPanel();
            oGrammalecte.oLxgPanel.clear();
            oGrammalecte.oLxgPanel.show();
            oGrammalecte.oLxgPanel.startWaitIcon();
        case "rightClickLxgPage":
            oGrammalecte.startLxgPanel();
            xGrammalectePort.postMessage({
                sCommand: "getListOfTokens",
                dParam: {sText: oGrammalecte.getPageText()},
                dInfo: {}
            });
            break;
        case "rightClickLxgSelectedText":
            oGrammalecte.startLxgPanel();
            // selected text is sent to the GC worker in the background script.
            break;
        // rescan page command
        case "rescanPage":
            oGrammalecte.rescanPage();
            break;
        default:
            console.log("[Content script] Unknown command: " + sActionDone);
    }
});


/*
    Start
*/
oGrammalecte.listenRightClick();
oGrammalecte.createMenus();
oGrammalecte.createMenus2();

    border-top: 4px solid hsla(210, 100%, 40%, .7);
    border-bottom: 4px solid hsla(210, 100%, 40%, .7);
    border-radius: 50%;
    text-align: center;
    cursor: pointer;
    box-shadow: 0 0 0 0 hsla(210, 50%, 50%, .5);
    z-index: 2147483640; /* maximum is 2147483647: https://stackoverflow.com/questions/491052/minimum-and-maximum-value-of-z-index */
    animation: grammalecte-spin 2s ease 3;
    animation: grammalecte-spin 2s ease 1;
}
.grammalecte_menu_main_button:hover {
    border: 4px solid hsla(210, 80%, 35%, .5);
    background-color: hsla(210, 80%, 55%, .5);
    animation: grammalecte-spin .5s linear infinite;
}

// JavaScript

"use strict";


class GrammalecteMenu {

    constructor (nMenu, xTextArea) {
    constructor (nMenu, xNode) {
        this.sMenuId = "grammalecte_menu" + nMenu;
        this.xButton = oGrammalecte.createNode("div", {className: "grammalecte_menu_main_button", textContent: " "});
        this.xButton.onclick = () => { this.switchMenu(); };
        this.xMenu = this._createMenu(xTextArea);
        this._insertAfter(this.xButton, xTextArea);
        this._insertAfter(this.xMenu, xTextArea);
        this.xMenu = this._createMenu(xNode);
        this._insertAfter(this.xButton, xNode);
        this._insertAfter(this.xMenu, xNode);
    }

    _insertAfter (xNewNode, xReferenceNode) {
        xReferenceNode.parentNode.insertBefore(xNewNode, xReferenceNode.nextSibling);
    }

    _createMenu (xTextArea) {
    _createMenu (xNode) {
        try {
            let sText = (xNode.tagName == "TEXTAREA") ? xNode.value : xNode.textContent;
            let xMenu = oGrammalecte.createNode("div", {id: this.sMenuId, className: "grammalecte_menu"});
            xMenu.appendChild(oGrammalecte.createNode("div", {className: "grammalecte_menu_header", textContent: "GRAMMALECTE"}));
            // Text formatter
            if (xNode.tagName == "TEXTAREA") {
            let xTFButton = oGrammalecte.createNode("div", {className: "grammalecte_menu_item", textContent: "Formateur de texte"});
            xTFButton.onclick = () => {
            	this.switchMenu();
                oGrammalecte.createTFPanel();
                oGrammalecte.oTFPanel.start(xTextArea);
                oGrammalecte.oTFPanel.show();
            };
                let xTFButton = oGrammalecte.createNode("div", {className: "grammalecte_menu_item", textContent: "Formateur de texte"});
                xTFButton.onclick = () => {
                    this.switchMenu();
                    oGrammalecte.createTFPanel();
                    oGrammalecte.oTFPanel.start(xNode);
                    oGrammalecte.oTFPanel.show();
                };
                xMenu.appendChild(xTFButton);
            }
            // lexicographe
            let xLxgButton = oGrammalecte.createNode("div", {className: "grammalecte_menu_item", textContent: "Lexicographe"});
            xLxgButton.onclick = () => {
            	this.switchMenu();
                oGrammalecte.createLxgPanel();
                this.switchMenu();
                oGrammalecte.startLxgPanel();
                oGrammalecte.oLxgPanel.clear();
                oGrammalecte.oLxgPanel.show();
                oGrammalecte.oLxgPanel.startWaitIcon();
                xGrammalectePort.postMessage({
                    sCommand: "getListOfTokens",
                    dParam: {sText: xTextArea.value},
                    dInfo: {sTextAreaId: xTextArea.id}
                    dParam: {sText: sText},
                    dInfo: {sTextAreaId: xNode.id}
                });
            };
            xMenu.appendChild(xLxgButton);
            // Grammar checker
            let xGCButton = oGrammalecte.createNode("div", {className: "grammalecte_menu_item", textContent: "Correction grammaticale"});
            xGCButton.onclick = () => {
            	this.switchMenu();
                oGrammalecte.createGCPanel();
                this.switchMenu();
                oGrammalecte.startGCPanel(xNode);
                oGrammalecte.oGCPanel.start(xTextArea);
                oGrammalecte.oGCPanel.show();
                oGrammalecte.oGCPanel.startWaitIcon();
                xGrammalectePort.postMessage({
                    sCommand: "parseAndSpellcheck",
                    dParam: {sText: xTextArea.value, sCountry: "FR", bDebug: false, bContext: false},
                    dInfo: {sTextAreaId: xTextArea.id}
                    dParam: {sText: sText, sCountry: "FR", bDebug: false, bContext: false},
                    dInfo: {sTextAreaId: xNode.id}
                });
            };
            xMenu.appendChild(xGCButton);
            // Conjugation tool
            let xConjButton = oGrammalecte.createNode("div", {className: "grammalecte_menu_item_block", textContent: "Conjugueur"});
            let xConjButtonTab = oGrammalecte.createNode("div", {className: "grammalecte_menu_button", textContent: "Onglet"});
            xConjButtonTab.onclick = () => {
            	this.switchMenu();
            	xGrammalectePort.postMessage({sCommand: "openConjugueurTab", dParam: null, dInfo: null});
                this.switchMenu();
                xGrammalectePort.postMessage({sCommand: "openConjugueurTab", dParam: null, dInfo: null});
            };
            let xConjButtonWin = oGrammalecte.createNode("div", {className: "grammalecte_menu_button", textContent: "Fenêtre"});
            xConjButtonWin.onclick = () => {
            	this.switchMenu();
            	xGrammalectePort.postMessage({sCommand: "openConjugueurWindow", dParam: null, dInfo: null});
                this.switchMenu();
                xGrammalectePort.postMessage({sCommand: "openConjugueurWindow", dParam: null, dInfo: null});
            };
            xConjButton.appendChild(xConjButtonTab);
            xConjButton.appendChild(xConjButtonWin);
            // Create
            xMenu.appendChild(oGrammalecte.createNode("div", {className: "grammalecte_menu_header", textContent: "GRAMMALECTE"}));
            xMenu.appendChild(xTFButton);
            xMenu.appendChild(xLxgButton);
            xMenu.appendChild(xGCButton);
            xMenu.appendChild(xConjButton);
            //xMenu.appendChild(oGrammalecte.createNode("img", {scr: browser.extension.getURL("img/logo-16.png")}));
            // can’t work, due to content-script policy: https://bugzilla.mozilla.org/show_bug.cgi?id=1267027
            xMenu.appendChild(oGrammalecte.createNode("div", {className: "grammalecte_menu_footer"}));
            return xMenu;
        }
        catch (e) {
            showError(e);
        }
    }

    deleteNodes () {
        this.xMenu.parentNode.removeChild(this.xMenu);
        this.xButton.parentNode.removeChild(this.xButton);
    }

    switchMenu () {
    	let xMenu = document.getElementById(this.sMenuId);
        let xMenu = document.getElementById(this.sMenuId);
        xMenu.style.display = (xMenu.style.display == "block") ? "none" : "block";
    }
}

.grammalecte_panel_title {
    padding: 10px 20px;
}
.grammalecte_panel_label {
    display: inline-block;
    padding: 0 10px;
}
.grammalecte_panel_invisible_marker {
    position: absolute;
    /*visibility: hidden;*/
    font-size: 6px;
    color: hsl(210, 0%, 90%); /* same color than panel_bar background */
}

.grammalecte_panel_commands {
    float: right;
}
.grammalecte_copy_button {
    display: inline-block;
    padding: 2px 10px;

        this.xPanel = this._createPanel(sTitle);
        this.center();
    }

    _createPanel (sTitle) {
        try {
            let xPanel = oGrammalecte.createNode("div", {id: this.sId, className: "grammalecte_panel"});
            this.xPanelBar.appendChild(oGrammalecte.createNode("div", {className: "grammalecte_panel_invisible_marker", textContent: "__grammalecte_panel__"}));
            this.xPanelBar.appendChild(this._createButtons());
            let xTitle = oGrammalecte.createNode("div", {className: "grammalecte_panel_title"});
            xTitle.appendChild(this._createLogo());
            xTitle.appendChild(oGrammalecte.createNode("div", {className: "grammalecte_panel_label", textContent: sTitle}));
            this.xPanelBar.appendChild(xTitle);
            xPanel.appendChild(this.xPanelBar);
            xPanel.appendChild(this.xPanelContent);

    show () {
        this.xPanel.style.display = "block";
    }

    hide () {
        this.xPanel.style.display = "none";
        oGrammalecte.clearRightClickedNode();
    }

    center () {
        let nHeight = (this.bFlexible) ? window.innerHeight-100 : this.nHeight;
        this.xPanel.style = `top: 50%; left: 50%; width: ${this.nWidth}px; height: ${nHeight}px; margin-top: -${nHeight/2}px; margin-left: -${this.nWidth/2}px;`;
    }

        this.xContentNode.appendChild(this.xParagraphList);
        this.xPanelContent.addEventListener("click", onGrammalecteGCPanelClick, false);
        this.oTooltip = new GrammalecteTooltip(this.xContentNode);
        this.xPanelContent.appendChild(this.xContentNode);
        this.oTAC = new GrammalecteTextAreaControl();
    }

    start (xTextArea=null) {
    start (xNode=null) {
        this.oTooltip.hide();
        this.clear();
        if (xTextArea) {
            this.oTAC.setTextArea(xTextArea);
        if (xNode && xNode.tagName == "TEXTAREA") {
            this.oTAC.setTextArea(xNode);
        }
    }

    clear () {
        while (this.xParagraphList.firstChild) {
            this.xParagraphList.removeChild(this.xParagraphList.firstChild);
        }

        sText = sText.replace("\r\n", "\n").replace("\r", "\n");
        while ((iEnd = sText.indexOf("\n", iStart)) !== -1) {
            this._dParagraph.set(i, sText.slice(iStart, iEnd));
            i++;
            iStart = iEnd+1;
        }
        this._dParagraph.set(i, sText.slice(iStart));
        console.log("Paragraphs number: " + (i+1));
        //console.log("Paragraphs number: " + (i+1));
    }

    write () {
        if (this._xTextArea !== null) {
            let sText = "";
            this._dParagraph.forEach(function (val, key) {
                sText += val + "\n";
            });
            this._xTextArea.value = sText.slice(0,-1);
        }
    }
}

/*
    WORKER:
    https://developer.mozilla.org/en-US/docs/Web/API/Worker
    https://developer.mozilla.org/en-US/docs/Web/API/DedicatedWorkerGlobalScope


    JavaScript sucks.
    No module available in WebExtension at the moment! :(
    No require, no import/export.

    In Worker, we have importScripts() which imports everything in this scope.

    In order to use the same base of code with XUL-addon for Thunderbird and SDK-addon for Firefox,
    all modules have been “objectified”. And while they are still imported via “require”
    in the previous extensions, they are loaded as background scripts in WebExtension sharing
    the same memory space…

    When JavaScript become a modern language, “deobjectify” the modules…

    ATM, import/export are not available by default:
    — Chrome 60 – behind the Experimental Web Platform flag in chrome:flags.
    — Firefox 54 – behind the dom.moduleScripts.enabled setting in about:config.
    — Edge 15 – behind the Experimental JavaScript Features setting in about:flags.

    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import
    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/export
*/

"use strict";


console.log("GC Engine SharedWorker [start]");
//console.log(self);

importScripts("grammalecte/helpers.js");
importScripts("grammalecte/str_transform.js");
importScripts("grammalecte/ibdawg.js");
importScripts("grammalecte/text.js");
importScripts("grammalecte/tokenizer.js");
importScripts("grammalecte/fr/conj.js");
importScripts("grammalecte/fr/mfsp.js");
importScripts("grammalecte/fr/phonet.js");
importScripts("grammalecte/fr/cregex.js");
importScripts("grammalecte/fr/gc_options.js");
importScripts("grammalecte/fr/gc_rules.js");
importScripts("grammalecte/fr/gc_engine.js");
importScripts("grammalecte/fr/lexicographe.js");
importScripts("grammalecte/tests.js");
/*
    Warning.
    Initialization can’t be completed at startup of the worker,
    for we need the path of the extension to load data stored in JSON files.
    This path is retrieved in background.js and passed with the event “init”.
*/


/*
    Message Event Object
    https://developer.mozilla.org/en-US/docs/Web/API/MessageEvent
*/

let xPort = null;

function createResponse (sActionDone, result, dInfo, bError=false) {
    return {
        "sActionDone": sActionDone,
        "result": result, // can be of any type
        "dInfo": dInfo,
        "bError": bError
    };
}

function createErrorResult (e, sDescr="no description") {
    return {
        "sType": "error",
        "sDescription": sDescr,
        "sMessage": e.fileName + "\n" + e.name + "\nline: " + e.lineNumber + "\n" + e.message
    };
}

function showData (e) {
    for (let sParam in e) {
        console.log(sParam);
        console.log(e[sParam]);
    }
}

onconnect = function (e) {
    console.log("[Sharedworker] START CONNECTION");
    xPort = e.ports[0];

    xPort.onmessage = function (e) {
        console.log("[Sharedworker] ONMESSAGE");
        let {sCommand, dParam, dInfo} = e.data;
        console.log(e.data);
        switch (sCommand) {
            case "init":
                init(dParam.sExtensionPath, dParam.sOptions, dParam.sContext, dInfo);
                break;
            case "parse":
                parse(dParam.sText, dParam.sCountry, dParam.bDebug, dParam.bContext, dInfo);
                break;
            case "parseAndSpellcheck":
                parseAndSpellcheck(dParam.sText, dParam.sCountry, dParam.bDebug, dParam.bContext, dInfo);
                break;
            case "getOptions":
                getOptions(dInfo);
                break;
            case "getDefaultOptions":
                getDefaultOptions(dInfo);
                break;
            case "setOptions":
                setOptions(dParam.sOptions, dInfo);
                break;
            case "setOption":
                setOption(dParam.sOptName, dParam.bValue, dInfo);
                break;
            case "resetOptions":
                resetOptions(dInfo);
                break;
            case "textToTest":
                textToTest(dParam.sText, dParam.sCountry, dParam.bDebug, dParam.bContext, dInfo);
                break;
            case "fullTests":
                fullTests('{"nbsp":true, "esp":true, "unit":true, "num":true}', dInfo);
                break;
            case "getListOfTokens":
                getListOfTokens(dParam.sText, dInfo);
                break;
            default:
                console.log("Unknown command: " + sCommand);
                showData(e.data);
        }
    }
    //xPort.start();
}

let bInitDone = false;

let oDict = null;
let oTokenizer = null;
let oLxg = null;
let oTest = null;


function init (sExtensionPath, sGCOptions="", sContext="JavaScript", dInfo={}) {
    try {
        if (!bInitDone) {
            console.log("[Sharedworker] Loading… Extension path: " + sExtensionPath);
            conj.init(helpers.loadFile(sExtensionPath + "/grammalecte/fr/conj_data.json"));
            phonet.init(helpers.loadFile(sExtensionPath + "/grammalecte/fr/phonet_data.json"));
            mfsp.init(helpers.loadFile(sExtensionPath + "/grammalecte/fr/mfsp_data.json"));
            console.log("[Sharedworker] Modules have been initialized…");
            gc_engine.load(sContext, sExtensionPath+"grammalecte/_dictionaries");
            oDict = gc_engine.getDictionary();
            oTest = new TestGrammarChecking(gc_engine, sExtensionPath+"/grammalecte/fr/tests_data.json");
            oLxg = new Lexicographe(oDict);
            if (sGCOptions !== "") {
                gc_engine.setOptions(helpers.objectToMap(JSON.parse(sGCOptions)));
            }
            oTokenizer = new Tokenizer("fr");
            //tests();
            bInitDone = true;
        } else {
            console.log("[Sharedworker] Already initialized…")
        }
        // we always retrieve options from the gc_engine, for setOptions filters obsolete options
        xPort.postMessage(createResponse("init", gc_engine.getOptions().gl_toString(), dInfo));
    }
    catch (e) {
        helpers.logerror(e);
        xPort.postMessage(createResponse("init", createErrorResult(e, "init failed"), dInfo, true));
    }
}

function parse (sText, sCountry, bDebug, bContext, dInfo={}) {
    let aGrammErr = gc_engine.parse(sText, sCountry, bDebug, bContext);
    xPort.postMessage({sActionDone: "parse", result: aGrammErr, dInfo: dInfo});
}

function parseAndSpellcheck (sText, sCountry, bDebug, bContext, dInfo={}) {
    let aGrammErr = gc_engine.parse(sText, sCountry, bDebug, bContext);
    let aSpellErr = oTokenizer.getSpellingErrors(sText, oDict);
    xPort.postMessage(createResponse("parseAndSpellcheck", {aGrammErr: aGrammErr, aSpellErr: aSpellErr}, dInfo));
}

function getOptions (dInfo={}) {
    xPort.postMessage(createResponse("getOptions", gc_engine.getOptions().gl_toString(), dInfo));
}

function getDefaultOptions (dInfo={}) {
    xPort.postMessage(createResponse("getDefaultOptions", gc_engine.getDefaultOptions().gl_toString(), dInfo));
}

function setOptions (sGCOptions, dInfo={}) {
    gc_engine.setOptions(helpers.objectToMap(JSON.parse(sGCOptions)));
    xPort.postMessage(createResponse("setOptions", gc_engine.getOptions().gl_toString(), dInfo));
}

function setOption (sOptName, bValue, dInfo={}) {
    gc_engine.setOptions(new Map([ [sOptName, bValue] ]));
    xPort.postMessage(createResponse("setOption", gc_engine.getOptions().gl_toString(), dInfo));
}

function resetOptions (dInfo={}) {
    gc_engine.resetOptions();
    xPort.postMessage(createResponse("resetOptions", gc_engine.getOptions().gl_toString(), dInfo));
}

function tests () {
    console.log(conj.getConj("devenir", ":E", ":2s"));
    console.log(mfsp.getMasForm("emmerdeuse", true));
    console.log(mfsp.getMasForm("pointilleuse", false));
    console.log(phonet.getSimil("est"));
    let aRes = gc_engine.parse("Je suit...");
    for (let oErr of aRes) {
        console.log(text.getReadableError(oErr));
    }
}

function textToTest (sText, sCountry, bDebug, bContext, dInfo={}) {
    if (!gc_engine || !oDict) {
        xPort.postMessage(createResponse("textToTest", "# Grammar checker or dictionary not loaded.", dInfo));
        return;
    }
    let aGrammErr = gc_engine.parse(sText, sCountry, bDebug, bContext);
    let sMsg = "";
    for (let oErr of aGrammErr) {
        sMsg += text.getReadableError(oErr) + "\n";
    }
    xPort.postMessage(createResponse("textToTest", sMsg, dInfo));
}

function fullTests (sGCOptions="", dInfo={}) {
    if (!gc_engine || !oDict) {
        xPort.postMessage(createResponse("fullTests", "# Grammar checker or dictionary not loaded.", dInfo));
        return;
    }
    let dMemoOptions = gc_engine.getOptions();
    if (sGCOptions) {
        gc_engine.setOptions(helpers.objectToMap(JSON.parse(sGCOptions)));
    }
    let sMsg = "";
    for (let sRes of oTest.testParse()) {
        sMsg += sRes + "\n";
        console.log(sRes);
    }
    gc_engine.setOptions(dMemoOptions);
    xPort.postMessage(createResponse("fullTests", sMsg, dInfo));
}


// Lexicographer

function getListOfTokens (sText, dInfo={}) {
    try {
        let aElem = [];
        let aRes = null;
        for (let oToken of oTokenizer.genTokens(sText)) {
            aRes = oLxg.getInfoForToken(oToken);
            if (aRes) {
                aElem.push(aRes);
            }
        }
        xPort.postMessage(createResponse("getListOfTokens", aElem, dInfo));
    }
    catch (e) {
        helpers.logerror(e);
        xPort.postMessage(createResponse("getListOfTokens", createErrorResult(e, "no tokens"), dInfo, true));
    }
}

      <header id="menu">
        <nav>
          <header id="logo">
            <img src="../img/logo-32.png">
          </header>
          <ul>
            <li class="select" data-page="home_page"><i class="select fa fa-star icon" data-page="home_page"></i></li>
            <li class="select" data-page="help_page"><i class="select fa fa-question-circle icon" data-page="help_page"></i></li>
            <li class="select" data-page="gc_options_page"><i class="select fa fa-cogs icon" data-page="gc_options_page"></i></li>
            <li class="select" data-page="sc_options_page"><i class="select fa fa-cube icon" data-page="sc_options_page"></i></li>
            <li class="select" data-page="help_page"><i class="select fa fa-cube icon" data-page="help_page"></i></li>
            <li class="select" data-page="gc_options_page"><i class="select fa fa-cog icon" data-page="gc_options_page"></i></li>
            <li class="select" data-page="sc_options_page"><i class="select fa fa-book icon" data-page="sc_options_page"></i></li>
            <li class="select" data-page="test_page"><i class="select fa fa-flask icon" data-page="test_page"></i></li>
          </ul>
        </nav>
      </header> <!-- #menu -->

      <div id="page">

            <p id="link_othersponsors" class="link center" data-url="http://grammalecte.net/?thanks">
              et tous ceux qui l’ont soutenu
            </p>
          </div>
        </section> <!-- #home_page -->

        <section id="help_page" class="page">
          <h1>AIDE</h1>
          <h1>INTERFACE</h1>
          <div id="help_section">
            <p>Grammalecte affiche un bouton d’accès au menu en bas à gauche des zones de texte usuelles pour accéder aux fonctionnalités existantes.</p>
            <p class="right"><img src="../img/menu_button1.png" title="bouton du menu" /></p>
            <p class="right"><img src="../img/menu_button2.png" title="menu" /></p>
            <p>Pour les autres zones de texte (HTML éditable), il faut sélectionner le texte et utiliser le menu contextuel.</p>
            <p class="right"><img src="../img/contextmenu.png" title="menu contextuel sur sélection" /></p>
            <h2>Raccourcis clavier</h2>