Notepad menu (#1072)

* WIP notepad menu

firmware/application/apps/ui_text_editor.hpp

@@ -27,17 +27,21 @@
 #include "ui_navigation.hpp"
 #include "ui_painter.hpp"
 #include "ui_widget.hpp"
-//#include "ui_textentry.hpp"
 
 #include "circular_buffer.hpp"
 #include "file.hpp"
 #include "optional.hpp"
 
+#include <memory>
 #include <string>
 #include <vector>
 
 namespace ui {
 
+/* TODO:
+ * - Copy on write into temp file so startup is fast.
+ */
+
 enum class LineEnding : uint8_t {
     LF,
     CRLF
@@ -80,6 +84,7 @@ class FileWrapper {
    private:
     /* Number of newline offsets to cache. */
     static constexpr Offset max_newlines = 64;
+    static constexpr size_t buffer_size = 512;
 
     void initialize();
     std::string read(Offset offset, Offset length = 30);
@@ -107,6 +112,160 @@ class FileWrapper {
     CircularBuffer<Offset, max_newlines + 1> newlines_{};
 };
 
+/* Control that renders a text file. */
+class TextViewer : public Widget {
+   public:
+    TextViewer(Rect parent_rect);
+
+    TextViewer(const TextViewer&) = delete;
+    TextViewer(TextViewer&&) = delete;
+    TextViewer& operator=(const TextViewer&) = delete;
+    TextViewer& operator=(TextViewer&&) = delete;
+
+    std::function<void()> on_select{};
+    std::function<void()> on_cursor_moved{};
+
+    void paint(Painter& painter) override;
+    bool on_key(KeyEvent delta) override;
+    bool on_encoder(EncoderEvent delta) override;
+
+    void redraw(bool redraw_text = false);
+
+    void set_file(FileWrapper& file) { reset_file(&file); }
+    void clear_file() { reset_file(); }
+    bool has_file() const { return file_ != nullptr; }
+
+    uint32_t line() const { return cursor_.line; }
+    uint32_t col() const { return cursor_.col; }
+
+   private:
+    static constexpr int8_t char_width = 5;
+    static constexpr int8_t char_height = 8;
+    static constexpr Style style_text{
+        .font = font::fixed_5x8,
+        .background = Color::black(),
+        .foreground = Color::white(),
+    };
+
+    const uint8_t max_line = 32;
+    const uint8_t max_col = 48;
+
+    /* Returns true if the cursor was updated. */
+    bool apply_scrolling_constraints(
+        int16_t delta_line,
+        int16_t delta_col);
+
+    void paint_text(Painter& painter, uint32_t line, uint16_t col);
+    void paint_cursor(Painter& painter);
+
+    void reset_file(FileWrapper* file = nullptr);
+
+    // Gets the length of the current line.
+    uint16_t line_length();
+
+    FileWrapper* file_{};
+
+    struct {
+        // Previous cursor state.
+        uint32_t line{};
+        uint16_t col{};
+
+        // Previous draw state.
+        uint32_t first_line{};
+        uint16_t first_col{};
+        bool redraw_text{true};
+    } paint_state_{};
+
+    struct {
+        uint32_t line{};
+        uint16_t col{};
+        ScrollDirection dir{ScrollDirection::Vertical};
+    } cursor_{};
+};
+
+/* Menu control for the TextEditor. */
+class TextEditorMenu : public View {
+   public:
+    TextEditorMenu();
+
+    void on_show() override;
+    void on_hide() override;
+
+    std::function<void()>& on_cut() { return button_cut.on_select; }
+    std::function<void()>& on_paste() { return button_paste.on_select; }
+    std::function<void()>& on_copy() { return button_copy.on_select; }
+
+    std::function<void()>& on_delete_line() { return button_delline.on_select; }
+    std::function<void()>& on_edit_line() { return button_edit.on_select; }
+    std::function<void()>& on_add_line() { return button_addline.on_select; }
+
+    std::function<void()>& on_open() { return button_open.on_select; }
+    std::function<void()>& on_save() { return button_save.on_select; }
+    std::function<void()>& on_exit() { return button_exit.on_select; }
+
+   private:
+    void hide_children(bool hidden);
+
+    Rectangle rect_frame{
+        {0 * 8, 0 * 8, 23 * 8, 23 * 8},
+        Color::dark_grey()};
+
+    NewButton button_cut{
+        {1 * 8, 1 * 8, 7 * 8, 7 * 8},
+        "Cut",
+        &bitmap_icon_cut,
+        Color::dark_grey()};
+
+    NewButton button_paste{
+        {8 * 8, 1 * 8, 7 * 8, 7 * 8},
+        "Paste",
+        &bitmap_icon_paste,
+        Color::dark_grey()};
+
+    NewButton button_copy{
+        {15 * 8, 1 * 8, 7 * 8, 7 * 8},
+        "Copy",
+        &bitmap_icon_copy,
+        Color::dark_grey()};
+
+    NewButton button_delline{
+        {1 * 8, 8 * 8, 7 * 8, 7 * 8},
+        "-Line",
+        &bitmap_icon_delete,
+        Color::dark_red()};
+
+    NewButton button_edit{
+        {8 * 8, 8 * 8, 7 * 8, 7 * 8},
+        "Edit",
+        &bitmap_icon_rename,
+        Color::dark_blue()};
+
+    NewButton button_addline{
+        {15 * 8, 8 * 8, 7 * 8, 7 * 8},
+        "+Line",
+        &bitmap_icon_scanner,
+        Color::dark_blue()};
+
+    NewButton button_open{
+        {1 * 8, 15 * 8, 7 * 8, 7 * 8},
+        "Open",
+        &bitmap_icon_load,
+        Color::green()};
+
+    NewButton button_save{
+        {8 * 8, 15 * 8, 7 * 8, 7 * 8},
+        "Save",
+        &bitmap_icon_save,
+        Color::green()};
+
+    NewButton button_exit{
+        {15 * 8, 15 * 8, 7 * 8, 7 * 8},
+        "Exit",
+        &bitmap_icon_previous,
+        Color::dark_red()};
+};
+
+/* View viewing and minor edits on a text file. */
 class TextEditorView : public View {
    public:
     TextEditorView(NavigationView& nav);
@@ -118,72 +277,37 @@ class TextEditorView : public View {
         return "Notepad";
     };
 
-    void on_focus() override;
-    void paint(Painter& painter) override;
-    bool on_key(KeyEvent delta) override;
-    bool on_encoder(EncoderEvent delta) override;
+    void on_show() override;
 
    private:
-    static constexpr uint8_t max_line = 32;
-    static constexpr uint8_t max_col = 48;
-    static constexpr int8_t char_width = 5;
-    static constexpr int8_t char_height = 8;
-
-    static constexpr Style style_default{
-        .font = font::fixed_5x8,
-        .background = Color::black(),
-        .foreground = Color::white(),
-    };
-
-    /* Returns true if the cursor was updated. */
-    bool apply_scrolling_constraints(
-        int16_t delta_line,
-        int16_t delta_col);
-
-    void refresh_ui();
     void open_file(const std::filesystem::path& path);
-
-    void paint_text(Painter& painter, uint32_t line, uint16_t col);
-    void paint_cursor(Painter& painter);
-
-    // Gets the length of the current line.
-    uint16_t line_length();
+    void refresh_ui();
+    void update_position();
+    void hide_menu(bool hidden = true);
+    void show_file_picker();
+    void show_nyi();
 
     NavigationView& nav_;
+    std::unique_ptr<FileWrapper> file_{};
 
-    FileWrapper file_{};
+    TextViewer viewer{
+        /* 272 = 320 - 16 (top bar) - 32 (bottom controls) */
+        {0, 0, 240, 272}};
 
-    struct {
-        // Previous cursor state.
-        uint32_t line{};
-        uint16_t col{};
+    TextEditorMenu menu{};
 
-        // Previous draw state.
-        uint32_t first_line{};
-        uint16_t first_col{};
-        bool redraw_text{true};
-        bool has_file{false};
-    } paint_state_{};
-
-    struct {
-        uint32_t line{};
-        uint16_t col{};
-        ScrollDirection dir{ScrollDirection::Vertical};
-    } cursor_{};
-
-    // TODO: The scrollable view should be its own widget
-    // otherwise control navigation doesn't work.
-
-    Button button_open{
-        {24 * 8, 34 * 8, 6 * 8, 4 * 8},
-        "Open"};
+    NewButton button_menu{
+        {26 * 8, 34 * 8, 4 * 8, 4 * 8},
+        {},
+        &bitmap_icon_controls,
+        Color::dark_grey()};
 
     Text text_position{
-        {0 * 8, 34 * 8, 24 * 8, 2 * 8},
+        {0 * 8, 34 * 8, 26 * 8, 2 * 8},
         ""};
 
     Text text_size{
-        {0 * 8, 36 * 8, 24 * 8, 2 * 8},
+        {0 * 8, 36 * 8, 26 * 8, 2 * 8},
         ""};
 };