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| 1 | +//! Text tool - add text annotations. |
| 2 | + |
| 3 | +use super::Tool; |
| 4 | +use crate::annotate::state::ToolProperties; |
| 5 | +use gartk_core::{InputEvent, Key, MouseButton, Point}; |
| 6 | +use gartk_render::cairo::Context; |
| 7 | +use gartk_render::set_color; |
| 8 | +use gartk_x11::CursorShape; |
| 9 | + |
| 10 | +/// Text annotation tool. |
| 11 | +pub struct TextTool { |
| 12 | + /// Position of text anchor. |
| 13 | + position: Option<Point>, |
| 14 | + /// Current text content. |
| 15 | + text: String, |
| 16 | + /// Whether we're in text editing mode. |
| 17 | + editing: bool, |
| 18 | + /// Cursor blink state (for visual feedback). |
| 19 | + cursor_visible: bool, |
| 20 | +} |
| 21 | + |
| 22 | +impl TextTool { |
| 23 | + /// Create a new text tool. |
| 24 | + pub fn new() -> Self { |
| 25 | + Self { |
| 26 | + position: None, |
| 27 | + text: String::new(), |
| 28 | + editing: false, |
| 29 | + cursor_visible: true, |
| 30 | + } |
| 31 | + } |
| 32 | + |
| 33 | + /// Draw the text with optional cursor. |
| 34 | + fn draw_text(&self, ctx: &Context, props: &ToolProperties, show_cursor: bool) { |
| 35 | + if let Some(pos) = self.position { |
| 36 | + if self.text.is_empty() && !show_cursor { |
| 37 | + return; |
| 38 | + } |
| 39 | + |
| 40 | + set_color(ctx, props.color); |
| 41 | + |
| 42 | + // Set font |
| 43 | + ctx.select_font_face("monospace", cairo::FontSlant::Normal, cairo::FontWeight::Normal); |
| 44 | + ctx.set_font_size(props.font_size); |
| 45 | + |
| 46 | + // Draw text |
| 47 | + ctx.move_to(pos.x as f64, pos.y as f64 + props.font_size); |
| 48 | + |
| 49 | + if self.text.is_empty() { |
| 50 | + // Show placeholder cursor |
| 51 | + if show_cursor && self.cursor_visible { |
| 52 | + let _ = ctx.show_text("|"); |
| 53 | + } |
| 54 | + } else { |
| 55 | + let _ = ctx.show_text(&self.text); |
| 56 | + |
| 57 | + // Draw cursor at end |
| 58 | + if show_cursor && self.cursor_visible && self.editing { |
| 59 | + let extents = match ctx.text_extents(&self.text) { |
| 60 | + Ok(e) => e, |
| 61 | + Err(_) => return, |
| 62 | + }; |
| 63 | + ctx.move_to( |
| 64 | + pos.x as f64 + extents.width(), |
| 65 | + pos.y as f64 + props.font_size, |
| 66 | + ); |
| 67 | + let _ = ctx.show_text("|"); |
| 68 | + } |
| 69 | + } |
| 70 | + } |
| 71 | + } |
| 72 | +} |
| 73 | + |
| 74 | +impl Default for TextTool { |
| 75 | + fn default() -> Self { |
| 76 | + Self::new() |
| 77 | + } |
| 78 | +} |
| 79 | + |
| 80 | +impl Tool for TextTool { |
| 81 | + fn handle_event(&mut self, event: &InputEvent, _props: &ToolProperties) -> bool { |
| 82 | + match event { |
| 83 | + InputEvent::MousePress(e) if e.button == Some(MouseButton::Left) => { |
| 84 | + if self.editing { |
| 85 | + // Clicking while editing commits the text at new position |
| 86 | + self.editing = false; |
| 87 | + // Don't reset - keep the text for commit |
| 88 | + return true; |
| 89 | + } |
| 90 | + // Start new text at click position |
| 91 | + self.position = Some(e.position); |
| 92 | + self.text.clear(); |
| 93 | + self.editing = true; |
| 94 | + true |
| 95 | + } |
| 96 | + InputEvent::Key(e) if self.editing && e.pressed => { |
| 97 | + match e.key { |
| 98 | + Key::Return => { |
| 99 | + // Finish editing |
| 100 | + self.editing = false; |
| 101 | + true |
| 102 | + } |
| 103 | + Key::Escape => { |
| 104 | + // Cancel text |
| 105 | + self.reset(); |
| 106 | + true |
| 107 | + } |
| 108 | + Key::Backspace => { |
| 109 | + self.text.pop(); |
| 110 | + true |
| 111 | + } |
| 112 | + Key::Char(c) => { |
| 113 | + // Handle character input |
| 114 | + if !c.is_control() { |
| 115 | + self.text.push(c); |
| 116 | + return true; |
| 117 | + } |
| 118 | + false |
| 119 | + } |
| 120 | + Key::Space => { |
| 121 | + self.text.push(' '); |
| 122 | + true |
| 123 | + } |
| 124 | + _ => false, |
| 125 | + } |
| 126 | + } |
| 127 | + _ => false, |
| 128 | + } |
| 129 | + } |
| 130 | + |
| 131 | + fn draw_preview(&self, ctx: &Context, props: &ToolProperties) { |
| 132 | + self.draw_text(ctx, props, true); |
| 133 | + } |
| 134 | + |
| 135 | + fn commit(&self, ctx: &Context, props: &ToolProperties) { |
| 136 | + self.draw_text(ctx, props, false); |
| 137 | + } |
| 138 | + |
| 139 | + fn reset(&mut self) { |
| 140 | + self.position = None; |
| 141 | + self.text.clear(); |
| 142 | + self.editing = false; |
| 143 | + } |
| 144 | + |
| 145 | + fn cursor(&self) -> CursorShape { |
| 146 | + CursorShape::Text |
| 147 | + } |
| 148 | + |
| 149 | + fn is_drawing(&self) -> bool { |
| 150 | + self.editing |
| 151 | + } |
| 152 | + |
| 153 | + fn can_commit(&self) -> bool { |
| 154 | + self.position.is_some() && !self.text.is_empty() && !self.editing |
| 155 | + } |
| 156 | +} |