1 files changed, 75 insertions, 0 deletions
diff --git a/SQLiteStudio3/guiSQLiteStudio/uiscriptingedit.cpp b/SQLiteStudio3/guiSQLiteStudio/uiscriptingedit.cpp
new file mode 100644
index 0000000..329af53
--- /dev/null
+++ b/SQLiteStudio3/guiSQLiteStudio/uiscriptingedit.cpp
@@ -0,0 +1,75 @@
+#include "uiscriptingedit.h"
+#include "common/unused.h"
+#include "services/pluginmanager.h"
+#include "syntaxhighlighterplugin.h"
+#include "pluginservicebase.h"
+#include <QPlainTextEdit>
+#include <QTextEdit>
+#include <QCoreApplication>
+#include <QSyntaxHighlighter>
+
+UiScriptingEdit::UiScriptingEdit()
+{
+}
+
+const char* UiScriptingEdit::getPropertyName() const
+{
+    return "scriptingEdit";
+}
+
+void UiScriptingEdit::handle(QWidget* widget, const QVariant& value)
+{
+    if (!value.toBool())
+        return;
+
+    new EditUpdater(widget); // widget becomes its parent and owns it
+}
+
+UiScriptingEdit::EditUpdater::EditUpdater(QWidget* widget) :
+    QObject(widget), watchedWidget(widget)
+{
+    widget->installEventFilter(this);
+}
+
+bool UiScriptingEdit::EditUpdater::eventFilter(QObject* obj, QEvent* e)
+{
+    UNUSED(obj);
+    if (changingHighlighter)
+        return false;
+
+    if (e->type() != QEvent::DynamicPropertyChange)
+        return false;
+
+    if (dynamic_cast<QDynamicPropertyChangeEvent*>(e)->propertyName() != PluginServiceBase::LANG_PROPERTY_NAME)
+        return false;
+
+    QVariant prop = watchedWidget->property(PluginServiceBase::LANG_PROPERTY_NAME);
+    installNewHighlighter(prop);
+
+    return false;
+}
+
+void UiScriptingEdit::EditUpdater::installNewHighlighter(const QVariant& prop)
+{
+    QString lang = prop.toString();
+    if (lang == currentLang)
+        return;
+
+    // When highlighter is deleted, it causes textChanged() signal and so this method is called recurrently.
+    // To avoid inifinite recursion, the changingHighlighter is used to ignore property changes during deletion
+    // of the highlighter.
+    changingHighlighter = true;
+    safe_delete(currentHighlighter);
+    currentLang = QString();
+    changingHighlighter = false;
+
+    for (SyntaxHighlighterPlugin* plugin : PLUGINS->getLoadedPlugins<SyntaxHighlighterPlugin>())
+    {
+        if (plugin->getLanguageName() != lang)
+            continue;
+
+        currentHighlighter = plugin->createSyntaxHighlighter(watchedWidget);
+        currentLang = lang;
+        break;
+    }
+}