1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
// Copyright © SixtyFPS GmbH <info@slint.dev>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0

//! This module contains the code for the highlight of some elements

use crate::dynamic_item_tree::{DynamicComponentVRc, ItemTreeBox};
use i_slint_compiler::object_tree::{Component, Element, ElementRc};
use i_slint_core::items::ItemRc;
use i_slint_core::lengths::LogicalRect;
use std::cell::RefCell;
use std::path::Path;
use std::rc::Rc;
use vtable::VRc;

fn normalize_repeated_element(element: ElementRc) -> ElementRc {
    if element.borrow().repeated.is_some() {
        if let i_slint_compiler::langtype::ElementType::Component(base) =
            &element.borrow().base_type
        {
            if base.parent_element.upgrade().is_some() {
                return base.root_element.clone();
            }
        }
    }

    element
}

fn collect_highlight_data(
    component: &DynamicComponentVRc,
    elements: &[std::rc::Weak<RefCell<Element>>],
) -> Vec<i_slint_core::lengths::LogicalRect> {
    let component_instance = VRc::downgrade(component);
    let component_instance = component_instance.upgrade().unwrap();
    generativity::make_guard!(guard);
    let c = component_instance.unerase(guard);
    let mut values = Vec::new();
    for element in elements.iter().filter_map(|e| e.upgrade()) {
        let element = normalize_repeated_element(element);
        if let Some(repeater_path) = repeater_path(&element) {
            fill_highlight_data(&repeater_path, &element, &c, &c, &mut values);
        }
    }
    values
}

pub(crate) fn component_positions(
    component_instance: &DynamicComponentVRc,
    path: &Path,
    offset: u32,
) -> Vec<i_slint_core::lengths::LogicalRect> {
    generativity::make_guard!(guard);
    let c = component_instance.unerase(guard);

    let elements =
        find_element_node_at_source_code_position(&c.description().original, path, offset);
    collect_highlight_data(
        component_instance,
        &elements.into_iter().map(|(e, _)| Rc::downgrade(&e)).collect::<Vec<_>>(),
    )
}

pub(crate) fn element_positions(
    component_instance: &DynamicComponentVRc,
    element: &ElementRc,
) -> Vec<LogicalRect> {
    generativity::make_guard!(guard);
    let c = component_instance.unerase(guard);

    let mut values = Vec::new();

    let element = normalize_repeated_element(element.clone());
    if let Some(repeater_path) = repeater_path(&element) {
        fill_highlight_data(&repeater_path, &element, &c, &c, &mut values);
    }
    values
}

pub(crate) fn element_node_at_source_code_position(
    component_instance: &DynamicComponentVRc,
    path: &Path,
    offset: u32,
) -> Vec<(ElementRc, usize)> {
    generativity::make_guard!(guard);
    let c = component_instance.unerase(guard);

    find_element_node_at_source_code_position(&c.description().original, path, offset)
}

fn fill_highlight_data(
    repeater_path: &[String],
    element: &ElementRc,
    component_instance: &ItemTreeBox,
    root_component_instance: &ItemTreeBox,
    values: &mut Vec<i_slint_core::lengths::LogicalRect>,
) {
    if element.borrow().repeated.is_some() {
        // avoid a panic
        return;
    }

    if let [first, rest @ ..] = repeater_path {
        generativity::make_guard!(guard);
        let rep = crate::dynamic_item_tree::get_repeater_by_name(
            component_instance.borrow_instance(),
            first.as_str(),
            guard,
        );
        for idx in rep.0.range() {
            if let Some(c) = rep.0.instance_at(idx) {
                generativity::make_guard!(guard);
                fill_highlight_data(
                    rest,
                    element,
                    &c.unerase(guard),
                    root_component_instance,
                    values,
                );
            }
        }
    } else {
        let vrc = VRc::into_dyn(
            component_instance.borrow_instance().self_weak().get().unwrap().upgrade().unwrap(),
        );
        let root_vrc = VRc::into_dyn(
            root_component_instance.borrow_instance().self_weak().get().unwrap().upgrade().unwrap(),
        );
        let index = element.borrow().item_index.get().copied().unwrap();
        let item_rc = ItemRc::new(vrc.clone(), index);
        let geometry = item_rc.geometry();
        let origin = item_rc.map_to_item_tree(geometry.origin, &root_vrc);
        let size = geometry.size;

        values.push(LogicalRect { origin, size });
    }
}

// Go over all elements in original to find the one that is highlighted
fn find_element_node_at_source_code_position(
    component: &Rc<Component>,
    path: &Path,
    offset: u32,
) -> Vec<(ElementRc, usize)> {
    let mut result = Vec::new();
    i_slint_compiler::object_tree::recurse_elem_including_sub_components(
        component,
        &(),
        &mut |elem, &()| {
            if elem.borrow().repeated.is_some() {
                return;
            }
            for (index, node) in elem
                .borrow()
                .debug
                .iter()
                .enumerate()
                .filter_map(|(i, n)| n.node.QualifiedName().map(|n| (i, n)))
            {
                if node.source_file.path() == path && node.text_range().contains(offset.into()) {
                    result.push((elem.clone(), index));
                }
            }
        },
    );
    result
}

fn repeater_path(elem: &ElementRc) -> Option<Vec<String>> {
    let enclosing = elem.borrow().enclosing_component.upgrade().unwrap();
    if let Some(parent) = enclosing.parent_element.upgrade() {
        // This is not a repeater, it might be a popup menu which is not supported ATM
        parent.borrow().repeated.as_ref()?;

        let mut r = repeater_path(&parent)?;
        r.push(parent.borrow().id.clone());
        Some(r)
    } else {
        Some(vec![])
    }
}