HackStudio: Start working on a "Locator", much like Qt Creator has

Pressing Ctrl+K will now open the little locator command line at the
bottom of the window. Right now it can only be used to jump quickly
to a file.

DevTools/HackStudio/Locator.cpp

@@ -0,0 +1,167 @@
+#include "Locator.h"
+#include "Project.h"
+#include <LibGUI/GBoxLayout.h>
+#include <LibGUI/GTableView.h>
+#include <LibGUI/GTextBox.h>
+#include <LibGUI/GWindow.h>
+
+extern RefPtr<Project> g_project;
+extern void open_file(const String&);
+static RefPtr<GraphicsBitmap> s_file_icon;
+
+class LocatorSuggestionModel final : public GModel {
+public:
+    explicit LocatorSuggestionModel(Vector<String>&& suggestions)
+        : m_suggestions(move(suggestions))
+    {
+    }
+
+    enum Column {
+        Icon,
+        Name,
+        __Column_Count,
+    };
+    virtual int row_count(const GModelIndex& = GModelIndex()) const override { return m_suggestions.size(); }
+    virtual int column_count(const GModelIndex& = GModelIndex()) const override { return Column::__Column_Count; }
+    virtual GVariant data(const GModelIndex& index, Role role = Role::Display) const override
+    {
+        auto& suggestion = m_suggestions.at(index.row());
+        if (role == Role::Display) {
+            if (index.column() == Column::Name)
+                return suggestion;
+            if (index.column() == Column::Icon) {
+                if (!s_file_icon) {
+                    s_file_icon = GraphicsBitmap::load_from_file("/res/icons/16x16/filetype-unknown.png");
+                }
+                return *s_file_icon;
+            }
+        }
+        return {};
+    }
+    virtual void update() override {};
+
+private:
+    Vector<String> m_suggestions;
+};
+
+class LocatorTextBox final : public GTextBox {
+    C_OBJECT(LocatorTextBox)
+public:
+    virtual ~LocatorTextBox() override {}
+
+    Function<void()> on_up;
+    Function<void()> on_down;
+
+    virtual void keydown_event(GKeyEvent& event) override
+    {
+        if (event.key() == Key_Up)
+            on_up();
+        else if (event.key() == Key_Down)
+            on_down();
+
+        GTextBox::keydown_event(event);
+    }
+
+private:
+    LocatorTextBox(GWidget* parent)
+        : GTextBox(parent)
+    {
+    }
+};
+
+Locator::Locator(GWidget* parent)
+    : GWidget(parent)
+{
+    set_layout(make<GBoxLayout>(Orientation::Vertical));
+    set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
+    set_preferred_size(0, 20);
+    m_textbox = LocatorTextBox::construct(this);
+    m_textbox->on_change = [this] {
+        update_suggestions();
+    };
+    m_textbox->on_escape_pressed = [this] {
+        m_popup_window->hide();
+    };
+    m_textbox->on_up = [this] {
+        GModelIndex new_index = m_suggestion_view->selection().first();
+        if (new_index.is_valid())
+            new_index = m_suggestion_view->model()->index(new_index.row() - 1);
+        else
+            new_index = m_suggestion_view->model()->index(0);
+
+        if (new_index.is_valid())
+            m_suggestion_view->selection().set(new_index);
+    };
+    m_textbox->on_down = [this] {
+        GModelIndex new_index = m_suggestion_view->selection().first();
+        if (new_index.is_valid())
+            new_index = m_suggestion_view->model()->index(new_index.row() + 1);
+        else
+            new_index = m_suggestion_view->model()->index(0);
+
+        if (new_index.is_valid())
+            m_suggestion_view->selection().set(new_index);
+    };
+    m_textbox->on_return_pressed = [this] {
+        auto selected_index = m_suggestion_view->selection().first();
+        if (!selected_index.is_valid())
+            return;
+        auto filename_index = m_suggestion_view->model()->index(selected_index.row(), LocatorSuggestionModel::Column::Name);
+        auto filename = m_suggestion_view->model()->data(filename_index, GModel::Role::Display).to_string();
+        open_file(filename);
+        close();
+    };
+
+    m_popup_window = GWindow::construct();
+    // FIXME: This is obviously not a tooltip window, but it's the closest thing to what we want atm.
+    m_popup_window->set_window_type(GWindowType::Tooltip);
+    m_popup_window->set_rect(0, 0, 500, 200);
+
+    m_suggestion_view = GTableView::construct(nullptr);
+    m_suggestion_view->set_size_columns_to_fit_content(true);
+    m_suggestion_view->set_headers_visible(false);
+    m_popup_window->set_main_widget(m_suggestion_view);
+}
+
+Locator::~Locator()
+{
+}
+
+void Locator::open()
+{
+    m_textbox->set_focus(true);
+    if (!m_textbox->text().is_empty()) {
+        m_textbox->select_all();
+        m_popup_window->show();
+    }
+}
+
+void Locator::close()
+{
+    m_popup_window->hide();
+}
+
+void Locator::keydown_event(GKeyEvent& event)
+{
+    GWidget::keydown_event(event);
+}
+
+void Locator::update_suggestions()
+{
+    auto typed_text = m_textbox->text();
+    Vector<String> suggestions;
+    g_project->for_each_text_file([&](auto& file) {
+        if (file.name().contains(typed_text))
+            suggestions.append(file.name());
+    });
+    dbg() << "I have " << suggestions.size() << " suggestion(s):";
+    for (auto& s : suggestions) {
+        dbg() << "    " << s;
+    }
+
+    m_suggestion_view->set_model(adopt(*new LocatorSuggestionModel(move(suggestions))));
+
+    m_popup_window->move_to(screen_relative_rect().top_left().translated(0, -m_popup_window->height()));
+    dbg() << "Popup rect: " << m_popup_window->rect();
+    m_popup_window->show();
+}

DevTools/HackStudio/Locator.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <LibGUI/GWidget.h>
+
+class LocatorTextBox;
+class GTableView;
+
+class Locator final : public GWidget {
+    C_OBJECT(Locator)
+public:
+    virtual ~Locator() override;
+
+    void open();
+    void close();
+
+private:
+    virtual void keydown_event(GKeyEvent&) override;
+
+    void update_suggestions();
+
+    explicit Locator(GWidget* parent);
+
+    RefPtr<LocatorTextBox> m_textbox;
+    RefPtr<GWindow> m_popup_window;
+    RefPtr<GTableView> m_suggestion_view;
+};

DevTools/HackStudio/Makefile

@@ -9,6 +9,7 @@ OBJS = \
     CppLexer.o \
     Editor.o \
     EditorWrapper.o \
+    Locator.o \
     main.o
 
 APP = HackStudio

DevTools/HackStudio/main.cpp

@@ -2,6 +2,7 @@
 #include "Editor.h"
 #include "EditorWrapper.h"
 #include "FindInFilesWidget.h"
+#include "Locator.h"
 #include "Project.h"
 #include "TerminalWrapper.h"
 #include <LibCore/CFile.h>
@@ -184,6 +185,12 @@ int main(int argc, char** argv)
     auto terminal_wrapper = TerminalWrapper::construct(nullptr);
     tab_widget->add_widget("Console", terminal_wrapper);
 
+    auto locator = Locator::construct(widget);
+
+    auto open_locator_action = GAction::create("Open Locator...", { Mod_Ctrl, Key_K }, [&](auto&) {
+        locator->open();
+    });
+
     auto menubar = make<GMenuBar>();
     auto app_menu = make<GMenu>("HackStudio");
     app_menu->add_action(save_action);
@@ -223,6 +230,7 @@ int main(int argc, char** argv)
 
     auto view_menu = make<GMenu>("View");
     view_menu->add_action(hide_action_tabs_action);
+    view_menu->add_action(open_locator_action);
     menubar->add_menu(move(view_menu));
 
     auto small_icon = GraphicsBitmap::load_from_file("/res/icons/16x16/app-hack-studio.png");