Ladybird+LibWebView: Move console history tracking to ConsoleClient

This will allow other chromes to make use of history in their console
implementations.

Ladybird/AppKit/UI/Console.mm

@@ -141,7 +141,7 @@ static constexpr CGFloat const WINDOW_HEIGHT = 600;
     auto script = Ladybird::ns_string_to_string(ns_script);
 
     if (!script.bytes_as_string_view().is_whitespace()) {
-        m_console_client->execute(script);
+        m_console_client->execute(move(script));
         [text_view setString:@""];
     }
 

Ladybird/Qt/ConsoleWidget.cpp

@@ -58,6 +58,16 @@ ConsoleWidget::ConsoleWidget(WebContentView& content_view)
 
 ConsoleWidget::~ConsoleWidget() = default;
 
+Optional<String> ConsoleWidget::previous_history_item()
+{
+    return m_console_client->previous_history_item();
+}
+
+Optional<String> ConsoleWidget::next_history_item()
+{
+    return m_console_client->next_history_item();
+}
+
 void ConsoleWidget::reset()
 {
     m_console_client->reset();
@@ -66,38 +76,22 @@ void ConsoleWidget::reset()
 void ConsoleInputEdit::keyPressEvent(QKeyEvent* event)
 {
     switch (event->key()) {
-    case Qt::Key_Down: {
-        if (m_history.is_empty())
-            break;
-        auto last_index = m_history.size() - 1;
-        if (m_history_index < last_index) {
-            m_history_index++;
-            setText(qstring_from_ak_deprecated_string(m_history.at(m_history_index)));
-        } else if (m_history_index == last_index) {
-            m_history_index++;
-            clear();
-        }
-        break;
-    }
-
     case Qt::Key_Up:
-        if (m_history_index > 0) {
-            m_history_index--;
-            setText(qstring_from_ak_deprecated_string(m_history.at(m_history_index)));
-        }
+        if (auto script = m_console_widget.previous_history_item(); script.has_value())
+            setText(qstring_from_ak_string(*script));
+        break;
+
+    case Qt::Key_Down:
+        if (auto script = m_console_widget.next_history_item(); script.has_value())
+            setText(qstring_from_ak_string(*script));
         break;
 
     case Qt::Key_Return: {
-        auto js_source = ak_deprecated_string_from_qstring(text());
-        if (js_source.is_whitespace())
+        auto js_source = MUST(ak_string_from_qstring(text()));
+        if (js_source.bytes_as_string_view().is_whitespace())
             return;
 
-        if (m_history.is_empty() || m_history.last() != js_source) {
-            m_history.append(js_source);
-            m_history_index = m_history.size();
-        }
-
-        m_console_widget.client().execute(js_source);
+        m_console_widget.client().execute(std::move(js_source));
         clear();
 
         break;

Ladybird/Qt/ConsoleWidget.h

@@ -11,7 +11,6 @@
 
 #include <AK/DeprecatedString.h>
 #include <AK/OwnPtr.h>
-#include <AK/Vector.h>
 #include <LibWebView/Forward.h>
 #include <QLineEdit>
 #include <QWidget>
@@ -26,6 +25,9 @@ public:
     explicit ConsoleWidget(WebContentView& content_view);
     virtual ~ConsoleWidget();
 
+    Optional<String> previous_history_item();
+    Optional<String> next_history_item();
+
     WebView::ConsoleClient& client() { return *m_console_client; }
     WebContentView& view() { return *m_output_view; }
 
@@ -51,8 +53,6 @@ private:
     virtual void keyPressEvent(QKeyEvent* event) override;
 
     ConsoleWidget& m_console_widget;
-    Vector<DeprecatedString> m_history;
-    size_t m_history_index { 0 };
 };
 
 }

Userland/Applications/Browser/ConsoleWidget.cpp

@@ -48,7 +48,7 @@ ConsoleWidget::ConsoleWidget(WebView::OutOfProcessWebView& content_view)
         m_input->add_current_text_to_history();
         m_input->clear();
 
-        m_console_client->execute(js_source);
+        m_console_client->execute(MUST(String::from_deprecated_string(js_source)));
     };
 
     set_focus_proxy(m_input);

Userland/Libraries/LibWebView/ConsoleClient.cpp

@@ -47,10 +47,44 @@ ConsoleClient::~ConsoleClient()
     m_content_web_view.on_received_console_messages = nullptr;
 }
 
-void ConsoleClient::execute(StringView script)
+void ConsoleClient::execute(String script)
 {
     print_source(script);
-    m_content_web_view.js_console_input(script);
+    m_content_web_view.js_console_input(script.to_deprecated_string());
+
+    if (m_history.is_empty() || m_history.last() != script) {
+        m_history.append(move(script));
+        m_history_index = m_history.size();
+    }
+}
+
+Optional<String> ConsoleClient::previous_history_item()
+{
+    if (m_history_index == 0)
+        return {};
+
+    --m_history_index;
+    return m_history.at(m_history_index);
+}
+
+Optional<String> ConsoleClient::next_history_item()
+{
+    if (m_history.is_empty())
+        return {};
+
+    auto last_index = m_history.size() - 1;
+
+    if (m_history_index < last_index) {
+        ++m_history_index;
+        return m_history.at(m_history_index);
+    }
+
+    if (m_history_index == last_index) {
+        ++m_history_index;
+        return String {};
+    }
+
+    return {};
 }
 
 void ConsoleClient::clear()

Userland/Libraries/LibWebView/ConsoleClient.h

@@ -9,6 +9,7 @@
 #include <AK/DeprecatedString.h>
 #include <AK/Function.h>
 #include <AK/Span.h>
+#include <AK/String.h>
 #include <AK/StringView.h>
 #include <AK/Vector.h>
 #include <LibWebView/Forward.h>
@@ -20,7 +21,10 @@ public:
     explicit ConsoleClient(ViewImplementation& content_web_view, ViewImplementation& console_web_view);
     ~ConsoleClient();
 
-    void execute(StringView);
+    void execute(String);
+
+    Optional<String> previous_history_item();
+    Optional<String> next_history_item();
 
     void clear();
     void reset();
@@ -50,6 +54,9 @@ private:
     };
     Vector<Group> m_group_stack;
     int m_next_group_id { 1 };
+
+    Vector<String> m_history;
+    size_t m_history_index { 0 };
 };
 
 }