vectorcraft/crates/engine/src/tests_textedit.rs

//! Rich text editing: range edit/style commands, the Type tools through the session, area and
//! on-path type from paths, Fit Headline, Convert To Area/Point Type.

use serde_json::{Value, json};
use vectorcraft_doc::{NodeId, NodeKind, TextKind, TextObject};
use vectorcraft_geom::Point;
use vectorcraft_tools::{Mods, PointerEvent, PointerKind, ToolKey};

use super::*;

fn session() -> Session {
    let mut s = Session::new();
    s.execute("file.new", &json!({"width": 800, "height": 600})).unwrap();
    s
}

fn text(s: &mut Session, t: &str) -> NodeId {
    let r = s.execute("text.create", &json!({"x": 100, "y": 100, "text": t, "size": 20})).unwrap();
    NodeId(r["id"].as_u64().unwrap())
}

fn obj(s: &Session, id: NodeId) -> TextObject {
    match &s.doc().unwrap().doc.node(id).unwrap().kind {
        NodeKind::Text(t) => (**t).clone(),
        _ => panic!("not text"),
    }
}

fn click(s: &mut Session, x: f64, y: f64) {
    let v = ViewInfo::default();
    for k in [PointerKind::Down, PointerKind::Up] {
        s.pointer(&PointerEvent::new(k, x, y), v).unwrap();
    }
}

fn key(s: &mut Session, k: ToolKey, m: Mods) {
    s.tool_key(k, m, ViewInfo::default()).unwrap();
}

fn undo_labels(s: &Session) -> Vec<String> {
    s.doc().unwrap().history.undo.iter().map(|e| e.label.clone()).collect()
}

#[test]
fn edit_range_replaces_and_undoes() {
    let mut s = session();
    let id = text(&mut s, "Hello world");
    let r = s.execute("text.editRange", &json!({"id": id.0, "start": 6, "end": 11, "insert": "there"})).unwrap();
    assert_eq!(r["caret"], json!(11));
    assert_eq!(obj(&s, id).plain_text(), "Hello there");
    // Out-of-range and reversed offsets are clamped.
    s.execute("text.editRange", &json!({"id": id.0, "start": 99, "end": 5, "insert": "!"})).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "Hello!");
    s.execute("edit.undo", &json!({})).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "Hello there");
    assert!(s.execute("text.editRange", &json!({"start": 0})).is_err(), "id required");
    let rect = s.execute("shape.rectangle", &json!({"x": 0, "y": 0, "width": 10, "height": 10})).unwrap();
    assert!(s.execute("text.editRange", &json!({"id": rect["id"], "insert": "x"})).is_err(), "not text");
}

#[test]
fn set_range_style_splits_runs() {
    let mut s = session();
    let id = text(&mut s, "Hello brave world");
    let w0 = obj(&s, id).cached_bounds.unwrap().width();
    let r = s.execute("text.setRangeStyle", &json!({"id": id.0, "start": 6, "end": 11, "size": 40, "fill": "#ff0000", "tracking": 50})).unwrap();
    assert_eq!(r["runs"], json!(3));
    let t = obj(&s, id);
    assert_eq!(t.runs[1].text, "brave");
    assert_eq!((t.runs[0].style.size, t.runs[1].style.size, t.runs[2].style.size), (20.0, 40.0, 20.0));
    assert_eq!(t.runs[1].style.tracking, 50.0);
    assert!(t.cached_bounds.unwrap().width() > w0 * 1.2, "bounds refreshed");
    // Kerning / scales / baseline / caps on another range; "auto" leading.
    s.execute("text.setRangeStyle", &json!({"id": id.0, "start": 0, "end": 5, "kerning": 20, "hScale": 80, "vScale": 120, "baselineShift": 3, "rotation": 370, "allCaps": true, "leading": "auto", "font": "Inter", "strokeWidth": 1})).unwrap();
    let st = obj(&s, id).runs[0].style.clone();
    assert_eq!((st.kerning, st.h_scale, st.v_scale, st.baseline_shift, st.all_caps), (Some(20.0), 80.0, 120.0, 3.0, true));
    assert!((st.rotation - 10.0).abs() < 1e-9);
    assert_eq!(st.font_family, "Inter");
    // One undo step per command.
    assert_eq!(undo_labels(&s).iter().filter(|l| *l == "Character").count(), 2);
    assert!(s.execute("text.setRangeStyle", &json!({"id": id.0})).is_err(), "nothing to change");
    assert!(s.execute("text.setRangeStyle", &json!({"id": id.0, "size": -1})).is_err());
}

#[test]
fn set_range_style_defaults_to_all_text_and_get_range() {
    let mut s = session();
    let id = text(&mut s, "abc");
    s.execute("text.setRangeStyle", &json!({"id": id.0, "size": 30})).unwrap();
    assert_eq!(obj(&s, id).runs.len(), 1);
    assert_eq!(obj(&s, id).runs[0].style.size, 30.0);
    s.execute("text.setRangeStyle", &json!({"id": id.0, "start": 1, "end": 2, "size": 10})).unwrap();
    let r = s.execute("text.getRange", &json!({"id": id.0, "start": 0, "end": 2})).unwrap();
    assert_eq!(r["text"], json!("ab"));
    assert_eq!(r["runs"].as_array().unwrap().len(), 2);
    assert_eq!(r["length"], json!(3));
}

#[test]
fn type_tool_typing_is_one_undo_step() {
    let mut s = session();
    let v = ViewInfo::default();
    s.select_tool("type", v).unwrap();
    click(&mut s, 200.0, 200.0);
    let id = s.doc().unwrap().selection.objects[0];
    s.tool_text("Hello", v).unwrap();
    s.tool_text(" world", v).unwrap();
    assert!(s.tool_wants_text());
    assert_eq!(obj(&s, id).plain_text(), "Hello world");
    key(&mut s, ToolKey::Left, Mods::default());
    assert!(!s.in_interaction(), "moving the caret commits");
    assert_eq!(undo_labels(&s).last().map(String::as_str), Some("Typing"));
    s.tool_text("!", v).unwrap();
    key(&mut s, ToolKey::Escape, Mods::default());
    assert_eq!(obj(&s, id).plain_text(), "Hello worl!d");
    s.execute("edit.undo", &json!({})).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "Hello world");
    s.execute("edit.undo", &json!({})).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "");
}

#[test]
fn undo_while_typing_takes_back_only_the_typing_and_redo_returns_it() {
    let mut s = session();
    let v = ViewInfo::default();
    s.select_tool("type", v).unwrap();
    click(&mut s, 200.0, 200.0);
    let id = s.doc().unwrap().selection.objects[0];
    s.tool_text("abc", v).unwrap();
    key(&mut s, ToolKey::Left, Mods::default());
    key(&mut s, ToolKey::Right, Mods::default());
    s.tool_text("def", v).unwrap();
    assert!(s.in_interaction(), "still typing");
    s.execute("edit.undo", &json!({})).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "abc", "only the typing in progress is undone");
    s.execute("edit.redo", &json!({})).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "abcdef", "and Redo brings it back");
    // Typing on after an undo starts a new session from the restored text.
    s.execute("edit.undo", &json!({})).unwrap();
    s.tool_text("!", v).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "abc!");
}

#[test]
fn undo_during_a_drag_takes_back_only_the_drag() {
    let mut s = session();
    let v = ViewInfo::default();
    let r = s.execute("shape.rectangle", &json!({"x": 100, "y": 100, "width": 50, "height": 50})).unwrap();
    let id = NodeId(r["id"].as_u64().unwrap());
    s.select_tool("selection", v).unwrap();
    s.pointer(&PointerEvent::new(PointerKind::Down, 125.0, 125.0), v).unwrap();
    s.pointer(&PointerEvent::new(PointerKind::Drag, 225.0, 125.0), v).unwrap();
    assert!(s.in_interaction(), "dragging");
    s.execute("edit.undo", &json!({})).unwrap();
    let doc = &s.doc().unwrap().doc;
    let b = doc.bounds_of(&[id], false).expect("the rectangle is still there");
    assert_eq!(b.x0, 100.0, "back where it was: {b:?}");
}

#[test]
fn type_tool_selection_replace_and_delete() {
    let mut s = session();
    let v = ViewInfo::default();
    let id = text(&mut s, "Hello brave world");
    s.select_tool("type", v).unwrap();
    // Click at the start of the text to edit it.
    let t = obj(&s, id);
    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t);
    let (a, b) = vectorcraft_text::caret_position(&lay, 6);
    let p = t.xf * a.midpoint(b);
    click(&mut s, p.x + 0.1, p.y);
    assert!(s.tool_wants_text());
    assert_eq!(s.tool_options()["caret"], json!(6));
    let shift_word = Mods { shift: true, alt: true, ..Default::default() };
    key(&mut s, ToolKey::Right, shift_word);
    assert_eq!((s.tool_options()["start"].as_u64(), s.tool_options()["end"].as_u64()), (Some(6), Some(11)));
    s.tool_text("bold", v).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "Hello bold world");
    key(&mut s, ToolKey::Home, Mods { shift: true, ..Default::default() });
    key(&mut s, ToolKey::Delete, Mods::default());
    assert_eq!(obj(&s, id).plain_text(), " world");
    key(&mut s, ToolKey::End, Mods::default());
    key(&mut s, ToolKey::Backspace, Mods { alt: true, ..Default::default() });
    assert_eq!(obj(&s, id).plain_text(), " ");
}

#[test]
fn character_panel_flow_styles_the_selected_range_while_editing() {
    let mut s = session();
    let v = ViewInfo::default();
    s.select_tool("type", v).unwrap();
    click(&mut s, 50.0, 300.0);
    let id = s.doc().unwrap().selection.objects[0];
    s.tool_text("Make this big", v).unwrap();
    // Select "this" (still inside the typing session).
    s.set_tool_option("select", &json!({"start": 5, "end": 9}));
    // What the panel does: end the typing session, then style the range.
    s.set_tool_option("commitTyping", &json!(true));
    s.commit_interaction().unwrap();
    let o = s.tool_options();
    s.execute("text.setRangeStyle", &json!({"id": o["editing"], "start": o["start"], "end": o["end"], "size": 48})).unwrap();
    let t = obj(&s, id);
    assert_eq!(t.runs.len(), 3);
    assert_eq!(t.runs[1].text, "this");
    assert_eq!(t.runs[1].style.size, 48.0);
    // Typing continues in a new session, over the styled selection (keeps its style).
    s.tool_text("THAT", v).unwrap();
    key(&mut s, ToolKey::Escape, Mods::default());
    let t = obj(&s, id);
    assert_eq!(t.plain_text(), "Make THAT big");
    assert_eq!(t.runs[1].text, "THAT");
    assert_eq!(t.runs[1].style.size, 48.0);
    let labels = undo_labels(&s);
    assert_eq!(&labels[labels.len() - 3..], ["Typing", "Character", "Typing"]);
}

#[test]
fn select_all_and_cut_like_ui() {
    let mut s = session();
    let v = ViewInfo::default();
    let id = text(&mut s, "abc def");
    s.select_tool("type", v).unwrap();
    let t = obj(&s, id);
    let p = t.xf * Point::new(2.0, -5.0);
    click(&mut s, p.x, p.y);
    s.set_tool_option("selectAll", &json!(true));
    let o = s.tool_options();
    let len = obj(&s, id).plain_text().len() as u64;
    let r = s.execute("text.getRange", &json!({"id": o["editing"], "start": o["start"], "end": o["end"].as_u64().unwrap().min(len)})).unwrap();
    assert_eq!(r["text"], json!("abc def"));
    s.set_tool_option("copy", &r["runs"]);
    key(&mut s, ToolKey::Delete, Mods::default());
    assert_eq!(obj(&s, id).plain_text(), "");
    s.tool_text("abc def", v).unwrap();
    s.tool_text("abc def", v).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "abc defabc def");
}

#[test]
fn area_type_from_a_circle_keeps_glyphs_inside() {
    let mut s = session();
    let e = s.execute("shape.ellipse", &json!({"x": 100, "y": 100, "width": 240, "height": 240})).unwrap();
    let pid = e["id"].as_u64().unwrap();
    let r = s.execute("text.createInPath", &json!({"path": pid, "mode": "area", "text": vectorcraft_engine_placeholder()})).unwrap();
    let id = NodeId(r["id"].as_u64().unwrap());
    assert!(s.doc().unwrap().doc.node(NodeId(pid)).is_none(), "the path became the frame");
    let t = obj(&s, id);
    assert!(matches!(t.kind, TextKind::Area { .. }));
    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t);
    assert!(lay.lines.len() > 5);
    let c = Point::new(220.0, 220.0);
    for g in lay.glyphs.iter().filter(|g| !g.outline.elements().is_empty()) {
        let l = &lay.lines[g.line];
        for q in [Point::new(g.origin.x, l.baseline - l.ascent), Point::new(g.origin.x + g.advance, l.baseline + l.descent)] {
            assert!((t.xf * q - c).hypot() <= 120.5, "{q:?}");
        }
    }
    assert_eq!(s.doc().unwrap().selection.objects, vec![id]);
    assert!(s.execute("text.createInPath", &json!({"path": 9999})).is_err());
}

fn vectorcraft_engine_placeholder() -> String {
    "Type flows inside any closed shape, line by line, trimmed to the shape's edges at each band. ".repeat(4)
}

#[test]
fn type_on_path_starts_where_clicked() {
    let mut s = session();
    let r = s
        .execute("shape.line", &json!({"x1": 100, "y1": 300, "x2": 500, "y2": 300}))
        .or_else(|_| s.execute("path.create", &json!({"points": [[100, 300], [500, 300]], "closed": false})));
    let pid = r.unwrap()["id"].as_u64().unwrap();
    let r = s.execute("text.createInPath", &json!({"path": pid, "mode": "onPath", "text": "On the line", "at": [200, 310]})).unwrap();
    let t = obj(&s, NodeId(r["id"].as_u64().unwrap()));
    let TextKind::OnPath { start, .. } = t.kind else { panic!() };
    assert!((start - 0.25).abs() < 0.01, "{start}");
    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t);
    let g0 = &lay.glyphs[0];
    assert!((g0.origin.y - 300.0).abs() < 1e-6 && (g0.origin.x - 200.0).abs() < 1.0, "{:?}", g0.origin);
}

#[test]
fn type_on_path_tool_through_session() {
    let mut s = session();
    let v = ViewInfo::default();
    let e = s.execute("shape.ellipse", &json!({"x": 100, "y": 100, "width": 200, "height": 200})).unwrap();
    s.select_tool("typeOnPath", v).unwrap();
    assert_eq!(s.tool_id(), "typeOnPath");
    click(&mut s, 300.0, 200.0);
    let id = s.doc().unwrap().selection.objects[0];
    assert_ne!(id.0, e["id"].as_u64().unwrap());
    s.tool_text("Around", v).unwrap();
    key(&mut s, ToolKey::Escape, Mods::default());
    let t = obj(&s, id);
    assert!(matches!(t.kind, TextKind::OnPath { .. }));
    assert_eq!(t.plain_text(), "Around");
}

#[test]
fn fit_headline_fills_the_frame_width() {
    let mut s = session();
    let r = s
        .execute(
            "text.create",
            &json!({"x": 50, "y": 50, "text": "Headline\nBody copy follows here", "size": 24, "area": {"width": 400, "height": 200}}),
        )
        .unwrap();
    let id = NodeId(r["id"].as_u64().unwrap());
    let r = s.execute("type.fitHeadline", &json!({"ids": [id.0]})).unwrap();
    assert!(r["tracking"][0].as_f64().unwrap() > 100.0, "{r}");
    let t = obj(&s, id);
    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t);
    let l0 = &lay.lines[0];
    assert_eq!(&t.plain_text()[l0.start..l0.end], "Headline", "still one line");
    assert!((l0.x1 - l0.x0 - 400.0).abs() < 1.0, "{}", l0.x1 - l0.x0);
    // The body keeps its tracking.
    assert_eq!(t.runs.last().unwrap().style.tracking, 0.0);
    let p = s.execute("text.create", &json!({"x": 1, "y": 1, "text": "point"})).unwrap();
    assert!(s.execute("type.fitHeadline", &json!({"ids": [p["id"]]})).is_err(), "area type only");
}

fn first_glyph_doc_pos(t: &TextObject) -> Point {
    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), t);
    t.xf * lay.glyphs[0].origin
}

#[test]
fn convert_area_point_keeps_text_in_place_for_every_alignment() {
    for j in ["left", "center", "right"] {
        let mut s = session();
        let r = s
            .execute(
                "text.create",
                &json!({"x": 100, "y": 100, "text": "Centered words wrap in a frame", "size": 18, "area": {"width": 150, "height": 200}}),
            )
            .unwrap();
        let id = NodeId(r["id"].as_u64().unwrap());
        s.execute("text.setStyle", &json!({"ids": [id.0], "justify": j})).unwrap();
        let before = first_glyph_doc_pos(&obj(&s, id));
        s.execute("type.convertToPointType", &json!({"ids": [id.0]})).unwrap();
        let t = obj(&s, id);
        assert!(matches!(t.kind, TextKind::Point));
        let after = first_glyph_doc_pos(&t);
        assert!((after - before).hypot() < 0.01, "{j}: {before:?} → {after:?}");
        s.execute("type.convertToAreaType", &json!({"ids": [id.0]})).unwrap();
        let t = obj(&s, id);
        let back = first_glyph_doc_pos(&t);
        assert!((back - before).hypot() < 0.01, "{j} (area again): {before:?} → {back:?}");
        let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t);
        assert!(!lay.overflow);
    }
}

#[test]
fn commands_are_listed_with_params() {
    let s = session();
    let cmds: Vec<Value> = s.commands().iter().map(|c| serde_json::to_value(c).unwrap()).collect();
    for id in ["text.editRange", "text.setRangeStyle", "text.getRange", "text.createInPath", "type.fitHeadline"] {
        assert!(cmds.iter().any(|c| c["id"] == id), "{id}");
    }
}

#[test]
fn type_tool_state_does_not_leak_across_documents() {
    let mut s = session();
    let v = ViewInfo::default();
    s.select_tool("type", v).unwrap();
    click(&mut s, 200.0, 200.0);
    let id = s.doc().unwrap().selection.objects[0];
    s.tool_text("First", v).unwrap();
    // A second document whose first object reuses the same id.
    s.execute("file.new", &json!({"width": 800, "height": 600})).unwrap();
    let id2 = text(&mut s, "Other");
    assert!(!s.tool_wants_text(), "switching documents ends the edit");
    s.tool_text("XYZ", v).unwrap();
    assert_eq!(obj(&s, id2).plain_text(), "Other");
    s.set_active(0);
    assert_eq!(obj(&s, id).plain_text(), "First");
    assert!(!s.in_interaction());
}