mayhem-firmware/firmware/application/apps/ui_text_editor.hpp

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/*
* Copyright (C) 2023 Kyle Reed
*
* This file is part of PortaPack.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
/* TODO:
* - Busy indicator while reading files.
*/
#ifndef __UI_TEXT_EDITOR_H__
#define __UI_TEXT_EDITOR_H__
#include "ui.hpp"
#include "ui_navigation.hpp"
#include "ui_painter.hpp"
#include "ui_styles.hpp"
#include "ui_widget.hpp"
#include "file_wrapper.hpp"
#include "optional.hpp"
#include <memory>
#include <string>
namespace ui {
enum class ScrollDirection : uint8_t {
Vertical,
Horizontal
};
/* 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 key) 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; }
uint32_t offset() const;
// Gets the length of the current line.
uint16_t line_length();
const Style& style() { return *font_style; }
void set_font_zoom(bool zoom);
void toggle_font_zoom() { set_font_zoom(!font_zoom); };
private:
bool font_zoom{};
const Style* font_style{};
int8_t char_width{};
int8_t char_height{};
uint8_t max_line{};
uint8_t max_col{};
/* 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);
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_zoom() { return button_zoom.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_zoom{
{15 * 8, 1 * 8, 7 * 8, 7 * 8},
"Zoom",
&bitmap_icon_search,
Color::dark_green()};
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);
TextEditorView(
NavigationView& nav,
const std::filesystem::path& path);
~TextEditorView();
std::string title() const override {
return "Notepad";
};
void on_show() override;
private:
static constexpr size_t max_edit_length = 1024;
std::string edit_line_buffer_{};
void open_file(const std::filesystem::path& path);
void save_file();
void refresh_ui();
void update_position();
void hide_menu(bool hidden = true);
void show_file_picker(bool immediate = true);
void show_edit_line();
void show_nyi();
void show_save_prompt(std::function<void()> continuation);
void prepare_for_write();
void create_temp_file() const;
void delete_temp_file() const;
void save_temp_file();
std::filesystem::path get_temp_path() const;
NavigationView& nav_;
std::unique_ptr<FileWrapper> file_{};
std::filesystem::path path_{};
bool file_dirty_{false};
bool has_temp_file_{false};
TextViewer viewer{
/* 272 = 320 - 16 (top bar) - 32 (bottom controls) */
{0, 0, 240, 272}};
TextEditorMenu menu{};
NewButton button_menu{
{26 * 8, 34 * 8, 4 * 8, 4 * 8},
{},
&bitmap_icon_controls,
Color::dark_grey()};
Text text_position{
{0 * 8, 34 * 8, 26 * 8, 2 * 8},
""};
Text text_size{
{0 * 8, 36 * 8, 26 * 8, 2 * 8},
""};
};
} // namespace ui
#endif // __UI_TEXT_EDITOR_H__