From 4e933f1f036cc507e24c97c21d25cd5ddfb16f2f Mon Sep 17 00:00:00 2001
From: ShaopengLin <shaopeng.lin@mail.utoronto.ca>
Date: Wed, 25 Sep 2024 15:21:18 -0400
Subject: [PATCH] Introduce KiwixWebChannelObject.{h, cpp}

Pass TOC title translation. More to come later
---
 kiwix-desktop.pro             |  4 +++-
 resources/js/toc.js           | 14 ++++++++++----
 src/kiwixwebchannelobject.cpp |  7 +++++++
 src/kiwixwebchannelobject.h   | 16 ++++++++++++++++
 src/kprofile.cpp              |  2 ++
 src/webpage.cpp               |  9 +++++++++
 6 files changed, 47 insertions(+), 5 deletions(-)
 create mode 100644 src/kiwixwebchannelobject.cpp
 create mode 100644 src/kiwixwebchannelobject.h

diff --git a/kiwix-desktop.pro b/kiwix-desktop.pro
index a8a16cb..416cf85 100644
--- a/kiwix-desktop.pro
+++ b/kiwix-desktop.pro
@@ -5,7 +5,7 @@
 #-------------------------------------------------
 
 QT       += core gui network
-QT       += webenginewidgets
+QT       += webenginewidgets webchannel
 QT       += printsupport
 
 # Avoid stripping incompatible files, due to false identification as executables, on WSL
@@ -85,6 +85,7 @@ SOURCES += \
     src/fullscreenwindow.cpp \
     src/fullscreennotification.cpp \
     src/zimview.cpp \
+    src/kiwixwebchannelobject.cpp \
 
 HEADERS += \
     src/choiceitem.h \
@@ -134,6 +135,7 @@ HEADERS += \
     src/menuproxystyle.h \
     src/zimview.h \
     src/portutils.h \
+    src/kiwixwebchannelobject.h \
 
 FORMS += \
     src/choiceitem.ui \
diff --git a/resources/js/toc.js b/resources/js/toc.js
index ff3a85c..a9870fa 100644
--- a/resources/js/toc.js
+++ b/resources/js/toc.js
@@ -63,7 +63,6 @@ function setupTOC()
 
     var tocTitle = document.createElement('p');
     tocTitle.id = "kiwix-toc-title";
-    tocTitle.textContent = "Table of content";
 
     var tocSideDiv = document.createElement('div');
     tocSideDiv.id = "kiwix-toc-side";
@@ -73,6 +72,13 @@ function setupTOC()
     document.body.prepend(tocSideDiv);
 }
 
-document.body.style.marginLeft = "310px";
-document.body.style.maxWidth = "calc(100vw - 310px)";
-setupTOC();
+new QWebChannel(qt.webChannelTransport, function(channel) {
+
+    var kiwixObj = channel.objects.kiwixChannelObj
+    document.body.style.marginLeft = "310px";
+    document.body.style.maxWidth = "calc(100vw - 310px)";
+    setupTOC();
+
+    document.getElementById("kiwix-toc-title").textContent = kiwixObj.tocTitle;
+});
+
diff --git a/src/kiwixwebchannelobject.cpp b/src/kiwixwebchannelobject.cpp
new file mode 100644
index 0000000..bb48935
--- /dev/null
+++ b/src/kiwixwebchannelobject.cpp
@@ -0,0 +1,7 @@
+#include "kiwixwebchannelobject.h"
+#include "kiwixapp.h"
+
+QString KiwixWebChannelObject::getTocTitle() const
+{
+    return gt("table-of-content");
+}
diff --git a/src/kiwixwebchannelobject.h b/src/kiwixwebchannelobject.h
new file mode 100644
index 0000000..6be3113
--- /dev/null
+++ b/src/kiwixwebchannelobject.h
@@ -0,0 +1,16 @@
+#ifndef KIWIXWEBCHANNELOBJECT_H
+#define KIWIXWEBCHANNELOBJECT_H
+
+#include <QObject>
+
+class KiwixWebChannelObject : public QObject
+{
+    Q_OBJECT
+public:
+    explicit KiwixWebChannelObject(QObject *parent = nullptr) : QObject(parent) {};
+
+    Q_INVOKABLE QString getTocTitle() const;
+    Q_PROPERTY(QString tocTitle READ getTocTitle CONSTANT);
+};
+
+#endif // KIWIXWEBCHANNELOBJECT_H
diff --git a/src/kprofile.cpp b/src/kprofile.cpp
index bc1dbc0..8da8fe7 100644
--- a/src/kprofile.cpp
+++ b/src/kprofile.cpp
@@ -31,6 +31,8 @@ KProfile::KProfile(QObject *parent) :
 
     scripts()->insert(getScript("qrc:/js/toc.js"));
     scripts()->insert(getScript("qrc:/js/tocCSS.js"));
+    scripts()->insert(getScript("qrc:/qtwebchannel/qwebchannel.js", 
+                      QWebEngineScript::DocumentCreation));
 }
 
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
diff --git a/src/webpage.cpp b/src/webpage.cpp
index 8824710..553961d 100644
--- a/src/webpage.cpp
+++ b/src/webpage.cpp
@@ -5,6 +5,10 @@
 #include <QMessageBox>
 #include "kiwixapp.h"
 #include <QWebEngineProfile>
+#include <QWebChannel>
+#include <QWebEngineScript>
+
+#include "kiwixwebchannelobject.h"
 
 WebPage::WebPage(QObject *parent) :
     QWebEnginePage(KiwixApp::instance()->getProfile(), parent)
@@ -12,6 +16,11 @@ WebPage::WebPage(QObject *parent) :
     action(QWebEnginePage::SavePage)->setVisible(false);
     action(QWebEnginePage::ViewSource)->setVisible(false);
     action(QWebEnginePage::Reload)->setVisible(false);
+
+    QWebChannel *channel = new QWebChannel(this);
+    KiwixWebChannelObject *kiwixChannelObj = new KiwixWebChannelObject(this);
+    setWebChannel(channel, QWebEngineScript::UserWorld);
+    channel->registerObject("kiwixChannelObj", kiwixChannelObj);
 }
 
 bool WebPage::acceptNavigationRequest(const QUrl &url, QWebEnginePage::NavigationType /*type*/, bool /*isMainFrame*/)