portapack-mayhem/firmware/application/apps/ui_text_editor.cpp
gullradriel 3d46c28911
fix build (#1215)
* fix build

* fixing build integrationg zoom

---------

Co-authored-by: GullCode <gullradriel@hotmail.com>
2023-06-29 13:58:10 -07:00

564 lines
14 KiB
C++

/*
* 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.
*/
#include "ui_fileman.hpp"
#include "ui_text_editor.hpp"
#include "ui_textentry.hpp"
#include "log_file.hpp"
#include "string_format.hpp"
using namespace portapack;
namespace fs = std::filesystem;
namespace {
/*void log(const std::string& msg) {
LogFile log{};
log.append("LOGS/Notepad.txt");
log.write_entry(msg);
}*/
} // namespace
namespace ui {
/* TextViewer *******************************************************/
TextViewer::TextViewer(Rect parent_rect)
: Widget(parent_rect) {
set_focusable(true);
set_font_zoom(false);
}
void TextViewer::paint(Painter& painter) {
auto first_line = paint_state_.first_line;
auto first_col = paint_state_.first_col;
if (!has_file())
return;
// Move the viewport vertically.
if (cursor_.line < first_line)
first_line = cursor_.line;
else if (cursor_.line >= first_line + max_line)
first_line = cursor_.line - max_line + 1;
// Move the viewport horizontally.
if (cursor_.col < first_col)
first_col = cursor_.col;
if (cursor_.col >= first_col + max_col)
first_col = cursor_.col - max_col + 1;
// Viewport updated? Redraw text.
if (first_line != paint_state_.first_line ||
first_col != paint_state_.first_col) {
paint_state_.first_line = first_line;
paint_state_.first_col = first_col;
paint_state_.redraw_text = true;
}
if (paint_state_.redraw_text) {
paint_text(painter, first_line, first_col);
paint_state_.redraw_text = false;
}
paint_cursor(painter);
}
bool TextViewer::on_key(const KeyEvent key) {
int16_t delta_col = 0;
int16_t delta_line = 0;
if (key == KeyEvent::Left)
delta_col = -1;
else if (key == KeyEvent::Right)
delta_col = 1;
else if (key == KeyEvent::Up)
delta_line = -1;
else if (key == KeyEvent::Down)
delta_line = 1;
else if (key == KeyEvent::Select && on_select) {
on_select();
return true;
}
// Always allow cursor direction to be updated.
cursor_.dir = delta_col != 0 ? ScrollDirection::Horizontal : ScrollDirection::Vertical;
auto updated = apply_scrolling_constraints(delta_line, delta_col);
if (updated)
redraw();
return updated;
}
bool TextViewer::on_encoder(EncoderEvent delta) {
bool updated = false;
if (cursor_.dir == ScrollDirection::Horizontal)
updated = apply_scrolling_constraints(0, delta);
else {
delta *= 16;
updated = apply_scrolling_constraints(delta, 0);
}
if (updated)
redraw();
return updated;
}
void TextViewer::redraw(bool redraw_text) {
paint_state_.redraw_text = redraw_text;
set_dirty();
}
uint32_t TextViewer::offset() const {
auto range = file_->line_range(cursor_.line);
if (range)
return range->start + col();
return 0;
}
void TextViewer::cursor_home() {
cursor_.col = 0;
redraw();
}
void TextViewer::cursor_end() {
cursor_.col = line_length() - 1;
redraw();
}
uint16_t TextViewer::line_length() {
return file_->line_length(cursor_.line);
}
bool TextViewer::apply_scrolling_constraints(int16_t delta_line, int16_t delta_col) {
if (!has_file())
return false;
int32_t new_line = cursor_.line + delta_line;
int32_t new_col = cursor_.col + delta_col;
int32_t new_line_length = file_->line_length(new_line);
if (new_col < 0)
--new_line;
else if (new_col >= new_line_length && delta_line == 0) {
// Only wrap if moving horizontally.
new_col = 0;
++new_line;
}
// Snap to first/last line to make navigating easier.
if (new_line < 0 && cursor_.line > 0) {
new_line = 0;
} else if (new_line >= (int32_t)file_->line_count()) {
auto last_line = file_->line_count() - 1;
if (cursor_.line < last_line)
new_line = last_line;
}
if (new_line < 0 || (uint32_t)new_line >= file_->line_count())
return false;
new_line_length = file_->line_length(new_line);
// Wrap or clamp column.
if (new_line_length == 0)
new_col = 0;
else if (new_col >= new_line_length || new_col < 0)
new_col = new_line_length - 1;
cursor_.line = new_line;
cursor_.col = new_col;
if (on_cursor_moved)
on_cursor_moved();
return true;
}
void TextViewer::paint_text(Painter& painter, uint32_t line, uint16_t col) {
auto r = screen_rect();
char buffer[max_col + 1];
// Draw the lines from the file
for (auto i = 0u; i < max_line; ++i) {
if (line + i >= file_->line_count())
break;
auto result = file_->get_text(line + i, col, buffer, max_col);
if (result && *result > 0)
painter.draw_string(
{0, r.top() + (int)i * char_height},
style(), {buffer, *result});
// Clear empty line sections. This is less visually jarring than full clear.
int32_t clear_width = max_col - (result ? *result : 0);
if (clear_width > 0)
painter.fill_rectangle(
{(max_col - clear_width) * char_width,
r.top() + (int)i * char_height,
clear_width * char_width, char_height},
style().background);
}
}
void TextViewer::paint_cursor(Painter& painter) {
if (!has_focus())
return;
auto draw_cursor = [this, &painter](uint32_t line, uint16_t col, Color c) {
auto r = screen_rect();
line = line - paint_state_.first_line;
col = col - paint_state_.first_col;
painter.draw_rectangle(
{(int)col * char_width - 1,
r.top() + (int)line * char_height,
char_width + 1, char_height},
c);
};
// Clear old cursor. CONSIDER: XOR cursor?
draw_cursor(paint_state_.line, paint_state_.col, style().background);
draw_cursor(cursor_.line, cursor_.col, style().foreground);
paint_state_.line = cursor_.line;
paint_state_.col = cursor_.col;
}
void TextViewer::reset_file(FileWrapper* file) {
file_ = file;
paint_state_.first_line = 0;
paint_state_.first_col = 0;
cursor_.line = 0;
cursor_.col = 0;
redraw(true);
}
void TextViewer::set_font_zoom(bool zoom) {
font_zoom = zoom;
font_style = font_zoom ? &Styles::white : &Styles::white_small;
char_height = style().font.line_height();
char_width = style().font.char_width();
max_line = (uint8_t)(parent_rect().height() / char_height);
max_col = (uint8_t)(parent_rect().width() / char_width);
}
/* TextEditorMenu ***************************************************/
TextEditorMenu::TextEditorMenu()
: View{{7 * 4, 9 * 4, 25 * 8, 25 * 8}} {
add_children(
{
&rect_frame,
&button_home,
&button_end,
&button_zoom,
&button_delline,
&button_edit,
&button_addline,
&button_open,
&button_save,
&button_exit,
});
}
void TextEditorMenu::on_show() {
hide_children(false);
button_edit.focus();
}
void TextEditorMenu::on_hide() {
hide_children(true);
}
void TextEditorMenu::hide_children(bool hidden) {
for (auto child : children()) {
child->hidden(hidden);
}
}
/* TextEditorView ***************************************************/
TextEditorView::TextEditorView(NavigationView& nav)
: nav_{nav} {
add_children(
{
&viewer,
&menu,
&button_menu,
&text_position,
&text_size,
});
viewer.on_select = [this]() {
// Treat as if menu button was pressed.
if (button_menu.on_select)
button_menu.on_select();
};
viewer.on_cursor_moved = [this]() {
update_position();
};
menu.hidden(true);
menu.on_home() = [this]() {
viewer.cursor_home();
hide_menu(true);
};
menu.on_end() = [this]() {
viewer.cursor_end();
hide_menu(true);
};
menu.on_zoom() = [this]() {
viewer.toggle_font_zoom();
refresh_ui();
hide_menu(true);
};
menu.on_delete_line() = [this]() {
prepare_for_write();
file_->delete_line(viewer.line());
refresh_ui();
hide_menu(true);
};
menu.on_edit_line() = [this]() {
show_edit_line();
};
menu.on_add_line() = [this]() {
prepare_for_write();
if (viewer.offset() < file_->size() - 1)
file_->insert_line(viewer.line());
else
file_->insert_line(-1); // Add after last line.
refresh_ui();
hide_menu(true);
};
menu.on_open() = [this]() {
/*show_save_prompt([this]() {
show_file_picker();
});*/
// HACK: above should work but it's faulting.
if (!file_dirty_) {
show_file_picker();
} else {
show_save_prompt(nullptr);
show_file_picker(false);
}
};
menu.on_save() = [this]() {
save_temp_file();
hide_menu(true);
};
menu.on_exit() = [this]() {
show_save_prompt([this]() {
nav_.pop();
});
};
button_menu.on_select = [this]() {
if (file_) {
// Toggle menu.
hide_menu(!menu.hidden());
} else {
show_file_picker();
}
};
}
TextEditorView::TextEditorView(NavigationView& nav, const fs::path& path)
: TextEditorView(nav) {
open_file(path);
}
TextEditorView::~TextEditorView() {
delete_temp_file();
}
void TextEditorView::on_show() {
if (file_)
viewer.focus();
else
button_menu.focus();
}
void TextEditorView::open_file(const fs::path& path) {
file_.reset();
viewer.clear_file();
delete_temp_file();
path_ = {};
file_dirty_ = false;
has_temp_file_ = false;
auto result = FileWrapper::open(path);
if (!result) {
nav_.display_modal("Read Error", "Cannot open file:\n" + result.error().what());
} else {
file_ = *std::move(result);
path_ = path;
viewer.set_file(*file_);
}
refresh_ui();
}
void TextEditorView::refresh_ui() {
if (file_) {
update_position();
text_size.set(
"Lines:" + to_string_dec_uint(file_->line_count()) +
" (" + to_string_file_size(file_->size()) + ")");
} else {
text_position.set("");
text_size.set("");
}
}
void TextEditorView::update_position() {
if (viewer.has_file()) {
text_position.set(
"Ln " + to_string_dec_uint(viewer.line() + 1) +
", Col " + to_string_dec_uint(viewer.col() + 1));
}
}
void TextEditorView::hide_menu(bool hidden) {
menu.hidden(hidden);
// Only let the viewer be focused when the menu is
// not shown, otherwise menu focus gets confusing.
viewer.set_focusable(hidden);
if (hidden)
viewer.focus();
viewer.redraw(true);
set_dirty();
}
void TextEditorView::show_file_picker(bool immediate) {
// TODO: immediate is a hack until nav_.on_pop is fixed.
auto open_view = immediate ? nav_.push<FileLoadView>("") : nav_.push_under_current<FileLoadView>("");
if (open_view) {
open_view->on_changed = [this](std::filesystem::path path) {
open_file(path);
hide_menu();
};
}
}
void TextEditorView::show_edit_line() {
auto str = file_->get_text(viewer.line(), 0, viewer.line_length());
if (!str) {
nav_.display_modal("Error", "Failed to get line text.");
return;
}
edit_line_buffer_ = *std::move(str);
text_prompt(
nav_,
edit_line_buffer_,
viewer.col(),
max_edit_length,
[this](std::string& buffer) {
auto range = file_->line_range(viewer.line());
if (!range)
return;
prepare_for_write();
file_->replace_range(*range, buffer);
});
nav_.set_on_pop([this]() {
edit_line_buffer_.clear();
refresh_ui();
hide_menu(true);
});
}
void TextEditorView::show_save_prompt(std::function<void()> continuation) {
if (!file_dirty_) {
if (continuation)
continuation();
return;
}
nav_.display_modal(
"Save?", "Save changes?", YESNO,
[this](bool choice) {
if (choice)
save_temp_file();
});
nav_.set_on_pop(continuation);
}
void TextEditorView::prepare_for_write() {
file_dirty_ = true;
if (has_temp_file_)
return;
// Copy to temp file on write.
has_temp_file_ = true;
delete_temp_file();
copy_file(path_, get_temp_path());
file_->assume_file(get_temp_path());
}
void TextEditorView::delete_temp_file() const {
auto temp_path = get_temp_path();
if (!temp_path.empty()) {
delete_file(temp_path);
}
}
void TextEditorView::save_temp_file() {
if (file_dirty_) {
delete_file(path_);
copy_file(get_temp_path(), path_);
file_dirty_ = false;
}
}
fs::path TextEditorView::get_temp_path() const {
if (!path_.empty())
return path_ + "~";
return {};
}
} // namespace ui