TextEditorWidget: Added improved save feature.

Instead of saving to a temp file, the TextEditorWidget now saves
to a path returned by the improved GFilePicker.

Applications/TextEditor/TextEditorWidget.cpp

@@ -1,4 +1,5 @@
 #include "TextEditorWidget.h"
+#include <AK/Optional.h>
 #include <AK/StringBuilder.h>
 #include <LibCore/CFile.h>
 #include <LibGUI/GAction.h>
@@ -33,17 +34,35 @@ TextEditorWidget::TextEditorWidget()
     });
 
     auto open_action = GAction::create("Open document", { Mod_Ctrl, Key_O }, GraphicsBitmap::load_from_file("/res/icons/16x16/open.png"), [this](const GAction&) {
-        GFilePicker picker;
+        Optional<String> open_name = GFilePicker::get_open_filepath();
 
-        if (picker.exec() == GDialog::ExecOK) {
-            m_path = picker.selected_file().string();
+        if (!open_name.has_value())
+            return;
+
+        m_path = open_name.value();
         open_sesame(m_path);
-        }
     });
 
     auto save_action = GAction::create("Save document", { Mod_Ctrl, Key_S }, GraphicsBitmap::load_from_file("/res/icons/16x16/save.png"), [this](const GAction&) {
-        dbgprintf("Writing document to '%s'\n", m_path.characters());
-        m_editor->write_to_file(m_path);
+        if (!m_path.is_empty()) {
+            if (!m_editor->write_to_file(m_path))
+                GMessageBox::show("Unable to save file.\n", "Error", GMessageBox::Type::Error, window());
+
+            return;
+        }
+
+        Optional<String> save_name = GFilePicker::get_save_filepath();
+        if (!save_name.has_value())
+            return;
+
+        dbgprintf("Writing document to '%s'\n", save_name.value());
+        if (!m_editor->write_to_file(save_name.value())) {
+            GMessageBox::show("Unable to save file.\n", "Error", GMessageBox::Type::Error, window());
+            return;
+        }
+
+        m_path = save_name.value();
+        window()->set_title(String::format("Text Editor: %s", m_path.characters()));
     });
 
     auto menubar = make<GMenuBar>();
@@ -121,5 +140,5 @@ void TextEditorWidget::open_sesame(const String& path)
 
     window()->set_title(String::format("Text Editor: %s", path.characters()));
     m_editor->set_text(String::copy(file.read_all()));
+    m_path = path;
 }
-

Applications/TextEditor/TextEditorWidget.h

@@ -15,6 +15,6 @@ public:
     void open_sesame(const String& path);
 
 private:
-    GTextEditor* m_editor{ nullptr };
-    String m_path = "/tmp/TextEditor.save.txt";
+    GTextEditor* m_editor { nullptr };
+    String m_path;
 };

Libraries/LibGUI/GFilePicker.cpp

@@ -1,4 +1,5 @@
 #include <AK/FileSystemPath.h>
+#include <AK/Function.h>
 #include <LibGUI/GAction.h>
 #include <LibGUI/GBoxLayout.h>
 #include <LibGUI/GButton.h>
@@ -12,9 +13,46 @@
 #include <LibGUI/GToolBar.h>
 #include <SharedGraphics/PNGLoader.h>
 
-GFilePicker::GFilePicker(const StringView& path, CObject* parent)
+Optional<String> GFilePicker::get_open_filepath()
+{
+    GFilePicker picker(Mode::Open);
+
+    if (picker.exec() == GDialog::ExecOK) {
+        String file_path = picker.selected_file().string();
+
+        if (file_path.is_null())
+            return {};
+
+        return file_path;
+    }
+    return {};
+}
+
+Optional<String> GFilePicker::get_save_filepath()
+{
+    GFilePicker picker(Mode::Save);
+
+    if (picker.exec() == GDialog::ExecOK) {
+        String file_path = picker.selected_file().string();
+
+        if (file_path.is_null())
+            return {};
+
+        if (GFilePicker::file_exists(file_path)) {
+            //TODO: Add Yes, No Messagebox to give the user a proper option
+            GMessageBox::show("File already exists: Overwrite?\n", "Error", GMessageBox::Type::Information, &picker);
+            return file_path;
+        }
+
+        return file_path;
+    }
+    return {};
+}
+
+GFilePicker::GFilePicker(Mode mode, const StringView& path, CObject* parent)
     : GDialog(parent)
     , m_model(GDirectoryModel::create())
+    , m_mode(mode)
 {
     set_title("GFilePicker");
     set_rect(200, 200, 700, 400);
@@ -95,12 +133,16 @@ GFilePicker::GFilePicker(const StringView& path, CObject* parent)
     filename_label->set_size_policy(SizePolicy::Fixed, SizePolicy::Fill);
     filename_label->set_preferred_size({ 60, 0 });
     auto* filename_textbox = new GTextBox(filename_container);
+    if (m_mode == Mode::Save) {
+        filename_textbox->set_text("Untitled.txt"); //TODO: replace .txt with a preferred extension
+        filename_textbox->set_focus(true);
+        filename_textbox->select_all();
+    }
 
     m_view->on_activation = [this, filename_textbox](auto& index) {
         auto& filter_model = (GSortingProxyModel&)*m_view->model();
         auto local_index = filter_model.map_to_target(index);
         const GDirectoryModel::Entry& entry = m_model->entry(local_index.row());
-
         FileSystemPath path(String::format("%s/%s", m_model->path().characters(), entry.name.characters()));
 
         clear_preview();
@@ -132,7 +174,7 @@ GFilePicker::GFilePicker(const StringView& path, CObject* parent)
     auto* ok_button = new GButton(button_container);
     ok_button->set_size_policy(SizePolicy::Fixed, SizePolicy::Fill);
     ok_button->set_preferred_size({ 80, 0 });
-    ok_button->set_text("OK");
+    ok_button->set_text(ok_button_name(m_mode));
     ok_button->on_click = [this, filename_textbox](auto&) {
         FileSystemPath path(String::format("%s/%s", m_model->path().characters(), filename_textbox->text().characters()));
         m_selected_file = path;
@@ -189,3 +231,17 @@ void GFilePicker::clear_preview()
     m_preview_name_label->set_text(String::empty());
     m_preview_geometry_label->set_text(String::empty());
 }
+
+bool GFilePicker::file_exists(const StringView& path)
+{
+    struct stat st;
+    int rc = stat(String(path).characters(), &st);
+    if (rc < 0) {
+        if (errno == ENOENT)
+            return false;
+    }
+    if (rc == 0) {
+        return true;
+    }
+    return false;
+}

Libraries/LibGUI/GFilePicker.h

@@ -1,4 +1,5 @@
 #include <AK/FileSystemPath.h>
+#include <AK/Optional.h>
 #include <LibGUI/GDialog.h>
 #include <LibGUI/GTableView.h>
 
@@ -7,7 +8,16 @@ class GLabel;
 
 class GFilePicker final : public GDialog {
 public:
-    GFilePicker(const StringView& path = "/", CObject* parent = nullptr);
+    enum class Mode {
+        Open,
+        Save
+    };
+
+    static Optional<String> get_open_filepath();
+    static Optional<String> get_save_filepath();
+    static bool file_exists(const StringView& path);
+
+    GFilePicker(Mode type = Mode::Open, const StringView& path = "/", CObject* parent = nullptr);
     virtual ~GFilePicker() override;
 
     FileSystemPath selected_file() const { return m_selected_file; }
@@ -18,6 +28,18 @@ private:
     void set_preview(const FileSystemPath&);
     void clear_preview();
 
+    static String ok_button_name(Mode mode)
+    {
+        switch (mode) {
+        case Mode::Open:
+            return "Open";
+        case Mode::Save:
+            return "Save";
+        default:
+            return "OK";
+        }
+    }
+
     GTableView* m_view { nullptr };
     NonnullRefPtr<GDirectoryModel> m_model;
     FileSystemPath m_selected_file;
@@ -25,4 +47,5 @@ private:
     GLabel* m_preview_image_label { nullptr };
     GLabel* m_preview_name_label { nullptr };
     GLabel* m_preview_geometry_label { nullptr };
+    Mode m_mode { Mode::Open };
 };