113 lines
4.5 KiB
Rust
113 lines
4.5 KiB
Rust
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mod editor;
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mod find_highlight;
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mod line_numbers;
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use crate::app::TextEditor;
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use eframe::egui;
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use self::editor::editor_view_ui;
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use self::line_numbers::{get_visual_line_mapping, render_line_numbers};
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pub(crate) fn central_panel(app: &mut TextEditor, ctx: &egui::Context) {
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let show_line_numbers = app.show_line_numbers;
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let word_wrap = app.word_wrap;
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let line_side = app.line_side;
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let font_size = app.font_size;
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egui::CentralPanel::default()
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.frame(egui::Frame::NONE)
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.show(ctx, |ui| {
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let bg_color = ui.visuals().extreme_bg_color;
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let panel_rect = ui.available_rect_before_wrap();
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ui.painter().rect_filled(panel_rect, 0.0, bg_color);
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let editor_height = panel_rect.height();
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if !show_line_numbers || app.get_active_tab().is_none() {
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egui::ScrollArea::vertical()
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.auto_shrink([false; 2])
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.show(ui, |ui| {
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editor_view_ui(ui, app);
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});
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return;
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}
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let line_count = app.get_text_processing_result().line_count;
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let editor_dimensions = app.calculate_editor_dimensions(ui);
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let line_number_width = editor_dimensions.line_number_width;
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let visual_line_mapping = if word_wrap {
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let available_text_width = editor_dimensions.text_width;
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if let Some(active_tab) = app.get_active_tab() {
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get_visual_line_mapping(
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ui,
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&active_tab.content,
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available_text_width,
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font_size,
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)
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} else {
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vec![]
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}
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} else {
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vec![]
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};
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let line_numbers_widget = |ui: &mut egui::Ui| {
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render_line_numbers(
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ui,
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line_count,
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&visual_line_mapping,
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line_number_width,
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word_wrap,
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font_size,
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);
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};
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let separator_widget = |ui: &mut egui::Ui| {
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ui.add_space(3.0);
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let separator_x = ui.cursor().left();
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let mut y_range = ui.available_rect_before_wrap().y_range();
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y_range.max += 2.0 * font_size; // Extend separator to cover more vertical space
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ui.painter()
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.vline(separator_x, y_range, ui.visuals().window_stroke);
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ui.add_space(4.0);
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};
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egui::ScrollArea::vertical()
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.auto_shrink([false; 2])
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.show(ui, |ui| {
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if line_side {
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// Line numbers on the right
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let text_editor_width = editor_dimensions.text_width + editor_dimensions.total_reserved_width;
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ui.allocate_ui_with_layout(
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egui::vec2(text_editor_width, editor_height),
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egui::Layout::left_to_right(egui::Align::TOP),
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|ui| {
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// Constrain editor to specific width to leave space for line numbers
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ui.allocate_ui_with_layout(
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egui::vec2(editor_dimensions.text_width, editor_height),
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egui::Layout::left_to_right(egui::Align::TOP),
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|ui| {
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editor_view_ui(ui, app);
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},
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);
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separator_widget(ui);
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line_numbers_widget(ui);
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},
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);
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} else {
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// Line numbers on the left
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let text_editor_width = editor_dimensions.text_width + editor_dimensions.total_reserved_width;
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ui.allocate_ui_with_layout(
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egui::vec2(text_editor_width, editor_height),
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egui::Layout::left_to_right(egui::Align::TOP),
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|ui| {
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line_numbers_widget(ui);
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separator_widget(ui);
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editor_view_ui(ui, app);
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},
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);
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}
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});
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});
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}
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