first working version

.gitignore

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+.idea/

.gitmodules

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+[submodule "mousetrap"]
+	path = mousetrap
+	url = https://github.com/ccampbell/mousetrap.git

contentscript.js

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+function getContentDocument() {
+    const iframe = document.getElementById("typo3-contentIframe");
+    return iframe ? iframe.contentDocument : document;
+}
+
+const parentDocument = window.frameElement ? top.document : document;
+
+const defaultkeys = {
+    close: 'escape',
+    save: 'mod+s',
+    saveAndClose: 'mod+shift+s',
+    saveAndViewPage: '',
+    saveAndCreateNewOne: '',
+    delete: 'del',
+    edit: 'e',
+    viewPage: 'v',
+    flushFrontendCaches: 'mod+del',
+    flushAllCaches: 'mod+shift+del',
+    searchField: 'mod+shift+f'
+};
+
+
+chrome.storage.sync.get(defaultkeys, function (keys) {
+    Mousetrap.bind(keys.close, function () {
+        const contentDocument = getContentDocument();
+        let closeButton = contentDocument.querySelector('.t3js-editform-close');
+        closeButton.click();
+        return false;
+    });
+    Mousetrap.bind(keys.save, function () {
+        const contentDocument = getContentDocument();
+        let saveButton = contentDocument.querySelector('[name="_savedok"]');
+        saveButton.click();
+        return false;
+    });
+    Mousetrap.bind(keys.saveAndClose, function () {
+        const contentDocument = getContentDocument();
+        let saveAndCloseButton = contentDocument.querySelector('[data-name="_saveandclosedok"]');
+        saveAndCloseButton.click();
+        return false;
+    });
+    Mousetrap.bind(keys.saveAndViewPage, function () {
+        const contentDocument = getContentDocument();
+        let saveAndViewPageButton = contentDocument.querySelector('[data-name="_savedokview"]');
+        saveAndViewPageButton.click();
+        return false;
+    });
+    Mousetrap.bind(keys.saveAndCreateNewOne, function () {
+        const contentDocument = getContentDocument();
+        let saveAndCreateNewOneButton = contentDocument.querySelector('[data-name="_savedoknew"]');
+        saveAndCreateNewOneButton.click();
+        return false;
+    });
+    Mousetrap.bind(keys.delete, function () {
+        const contentDocument = getContentDocument();
+        let deleteButton = contentDocument.querySelector('.t3js-editform-delete-record');
+        deleteButton.click();
+        return false;
+    });
+    Mousetrap.bind(keys.edit, function () {
+        const contentDocument = getContentDocument();
+        let editButton = contentDocument.querySelector('.icon-actions-page-open').parentElement;
+        editButton.click();
+        return false;
+    });
+    Mousetrap.bind(keys.viewPage, function () {
+        const contentDocument = getContentDocument();
+        let viewPageButton = contentDocument.querySelector('.icon-actions-document-view').parentElement;
+        viewPageButton.click();
+        return false;
+    });
+    Mousetrap.bind(keys.flushFrontendCaches, function () {
+        let flushFrontendCachesButton = parentDocument.querySelector('.icon-actions-system-cache-clear-impact-low').closest("a");
+        flushFrontendCachesButton.click();
+        return false;
+    });
+    Mousetrap.bind(keys.flushAllCaches, function () {
+        let flushAllCachesButton = parentDocument.querySelector('.icon-actions-system-cache-clear-impact-high').closest("a");
+        flushAllCachesButton.click();
+        return false;
+    });
+    Mousetrap.bind(keys.searchField, function () {
+        let searchField = parentDocument.getElementById("live-search-box");
+        searchField.focus();
+        return false;
+    });
+
+});

libs/mousetrap-record.js

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+../mousetrap/plugins/record/mousetrap-record.js

libs/mousetrap.js

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+../mousetrap/mousetrap.js

manifest.json

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+{
+  "manifest_version": 2,
+  "name": "Typo3 Keyboard Control",
+  "short_name": "Typo3 Keyboard Control",
+  "version": "1.0.0",
+  "description": "...",
+  "permissions": [
+    "storage"
+  ],
+  "options_ui": {
+    "page": "options.html"
+  },
+  "content_scripts": [
+    {
+      "matches": [
+        "*://*/typo3/*"
+      ],
+      "all_frames": true,
+      "js": [
+        "libs/mousetrap.js",
+        "contentscript.js"
+      ]
+    }
+  ],
+  "applications": {
+    "gecko": {
+      "id": "addon@example.com"
+    }
+  }
+}

mousetrap

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+Subproject commit 78bae4e98226b64d3c7ba7b9956f63e4f8c965ec

options.html

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+<!DOCTYPE html>
+
+<html>
+<head>
+    <meta charset="utf-8">
+</head>
+<style>
+    form div {
+        display: block;
+    }
+</style>
+<body>
+
+<form>
+    <div>
+        <label for="close">Schließen</label>
+        <input id="close" type="text">
+    </div>
+    <div>
+        <label for="save">Speichern</label>
+        <input id="save" type="text">
+    </div>
+    <div>
+        <label for="saveAndClose">Speichern und Schließen</label>
+        <input id="saveAndClose" type="text">
+    </div>
+    <div>
+        <label for="saveAndViewPage">Speichern und Seite anzeigen</label>
+        <input id="saveAndViewPage" type="text">
+    </div>
+    <div>
+        <label for="saveAndCreateNewOne">Speichern und neues erstellen</label>
+        <input id="saveAndCreateNewOne" type="text">
+    </div>
+    <div>
+        <label for="delete">Löschen</label>
+        <input id="delete" type="text">
+    </div>
+    <div>
+        <label for="edit">Bearbeiten</label>
+        <input id="edit" type="text">
+    </div>
+    <div>
+        <label for="viewPage">Seite anzeigen</label>
+        <input id="viewPage" type="text">
+    </div>
+    <div>
+        <label for="flushFrontendCaches">Frontend Cache leeren</label>
+        <input id="flushFrontendCaches" type="text">
+    </div>
+    <div>
+        <label for="flushAllCaches">Backend Cache leeren</label>
+        <input id="flushAllCaches" type="text">
+    </div>
+    <div>
+        <label for="searchField">Suche fokusieren</label>
+        <input id="searchField" type="text">
+    </div>
+    <button type="submit">Speichern</button>
+    <div style="display: none" id="saved">Saved</div>
+</form>
+
+
+<script src="options.js"></script>
+
+</body>
+
+</html>

options.js

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+const keys = {
+    close: 'escape',
+    save: 'mod+s',
+    saveAndClose: 'mod+shift+s',
+    saveAndViewPage: '',
+    saveAndCreateNewOne: '',
+    delete: 'del',
+    edit: 'e',
+    viewPage: 'v',
+    flushFrontendCaches: 'mod+del',
+    flushAllCaches: 'mod+shift+del',
+    searchField: 'mod+shift+f'
+};
+
+
+function saveOptions(e) {
+    e.preventDefault();
+
+    Object.entries(keys).forEach(([key, value]) => {
+        let obj = {};
+        obj[key] = document.getElementById(key).value;
+        chrome.storage.sync.set(obj);
+    });
+
+    document.getElementById("saved").style.display = "block";
+}
+
+function restoreOptions() {
+
+    Object.entries(keys).forEach(([key, value]) => {
+        chrome.storage.sync.get(key, function (result) {
+            console.info(result);
+            document.getElementById(key).value = result[key] || value
+        });
+    });
+}
+
+document.addEventListener("DOMContentLoaded", restoreOptions);
+document.querySelector("form").addEventListener("submit", saveOptions);