uzor 1.2.0

Core UI engine — geometry, interaction, input state
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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261

//! `DropdownBuilder` — chainable, default-friendly wrapper around
//! `register_layout_manager_dropdown`.
//!
//! Usage:
//! ```ignore
//! let h = layout.add_dropdown("file-menu");
//! lm::dropdown(&h)
//!     .items(&items)
//!     .anchor(button_rect)
//!     .build(&mut layout, &mut render);
//! ```

use crate::core::types::Rect;
use crate::docking::panels::DockPanel;
use crate::layout::{DropdownHandle, DropdownNode, LayoutManager, LayoutNodeId, StyleManager};
use crate::render::RenderContext;
use crate::types::{OverflowMode, SizeMode};
use crate::ui::widgets::composite::dropdown::input::register_layout_manager_dropdown;
use crate::ui::widgets::composite::dropdown::settings::DropdownSettings;
use crate::ui::widgets::composite::dropdown::style::DefaultDropdownStyle;
use crate::ui::widgets::composite::dropdown::theme::{DefaultDropdownTheme, DropdownTheme};
use crate::ui::widgets::composite::dropdown::types::{
    DropdownItem, DropdownRenderKind, DropdownView, DropdownViewKind, SubmenuWidth,
};

// =============================================================================
// StyledDropdownTheme
// =============================================================================

struct StyledDropdownTheme {
    bg:               String,
    border:           String,
    item_bg_hover:    String,
    item_bg_selected: String,
    item_text:        String,
    accent:           String,
    fallback:         DefaultDropdownTheme,
}

impl StyledDropdownTheme {
    fn from_styles(s: &StyleManager) -> Self {
        let accent     = s.color_or_owned("accent",    "#2962ff");
        let accent_dim = s.color_or_owned("accent_dim","rgba(41,98,255,0.15)");
        Self {
            bg:               s.color_or_owned("surface",       "#1e222d"),
            border:           s.color_or_owned("border_strong", "#363a45"),
            item_bg_hover:    s.color_or_owned("surface_raised","#2a2e39"),
            item_bg_selected: accent_dim,
            item_text:        s.color_or_owned("fg_1",          "#d1d4dc"),
            accent,
            fallback:         DefaultDropdownTheme,
        }
    }
}

impl DropdownTheme for StyledDropdownTheme {
    fn bg(&self)                    -> &str { &self.bg }
    fn border(&self)                -> &str { &self.border }
    fn shadow(&self)                -> &str { self.fallback.shadow() }
    fn item_bg_normal(&self)        -> &str { &self.bg }
    fn item_bg_hover(&self)         -> &str { &self.item_bg_hover }
    fn item_bg_selected(&self)      -> &str { &self.item_bg_selected }
    fn item_bg_danger_hover(&self)  -> &str { self.fallback.item_bg_danger_hover() }
    fn item_text(&self)             -> &str { &self.item_text }
    fn item_text_hover(&self)       -> &str { self.fallback.item_text_hover() }
    fn item_text_disabled(&self)    -> &str { self.fallback.item_text_disabled() }
    fn item_text_danger(&self)      -> &str { self.fallback.item_text_danger() }
    fn header_text(&self)           -> &str { self.fallback.header_text() }
    fn header_border(&self)         -> &str { &self.border }
    fn separator(&self)             -> &str { &self.border }
    fn shortcut_text(&self)         -> &str { self.fallback.shortcut_text() }
    fn caret_color(&self)           -> &str { self.fallback.caret_color() }
    fn toggle_on(&self)             -> &str { &self.accent }
    fn toggle_off(&self)            -> &str { self.fallback.toggle_off() }
    fn toggle_thumb(&self)          -> &str { self.fallback.toggle_thumb() }
    fn trigger_bg(&self)            -> &str { &self.bg }
    fn trigger_bg_hover(&self)      -> &str { &self.item_bg_hover }
    fn trigger_border(&self)        -> &str { &self.border }
    fn trigger_text(&self)          -> &str { &self.item_text }
    fn trigger_arrow(&self)         -> &str { self.fallback.trigger_arrow() }
    fn checkbox_border(&self)       -> &str { self.fallback.checkbox_border() }
    fn checkbox_checked(&self)      -> &str { &self.accent }
    fn cell_bg_hover(&self)         -> &str { &self.item_bg_hover }
    fn cell_border(&self)           -> &str { &self.border }
}

fn dropdown_settings_from_styles(s: &StyleManager) -> DropdownSettings {
    DropdownSettings {
        theme: Box::new(StyledDropdownTheme::from_styles(s)),
        style: Box::<DefaultDropdownStyle>::default(),
    }
}

/// Chainable builder for a dropdown overlay.
pub struct DropdownBuilder<'a> {
    handle:           &'a DropdownHandle,
    parent:           LayoutNodeId,
    slot_id:          Option<&'a str>,
    overlay_rect:     Option<Rect>,
    anchor:           Option<Rect>,
    /// Pending widget-id lookup — resolved at `.build()` via coord.
    anchor_widget_id: Option<&'a str>,
    position_override:Option<(f64, f64)>,
    open:             bool,
    items:            &'a [DropdownItem<'a>],
    hovered_id:       Option<&'a str>,
    submenu:          Option<(&'a str, &'a [DropdownItem<'a>])>,
    submenu_hovered:  Option<&'a str>,
    submenu_width:    SubmenuWidth,
    size_mode:        SizeMode,
    overflow:         OverflowMode,
    settings:         Option<DropdownSettings>,
    kind:             DropdownRenderKind,
}

/// Entry point: start a `DropdownBuilder` for the given handle.
pub fn dropdown<'a>(handle: &'a DropdownHandle) -> DropdownBuilder<'a> {
    DropdownBuilder::new(handle)
}

impl<'a> DropdownBuilder<'a> {
    /// New builder with all fields at default.
    pub fn new(handle: &'a DropdownHandle) -> Self {
        Self {
            handle,
            parent:            LayoutNodeId::ROOT,
            slot_id:           None,
            overlay_rect:      None,
            anchor:            None,
            anchor_widget_id:  None,
            position_override: None,
            open:              true,
            items:             &[],
            hovered_id:        None,
            submenu:           None,
            submenu_hovered:   None,
            submenu_width:     SubmenuWidth::default(),
            size_mode:         SizeMode::default(),
            overflow:          OverflowMode::Clip,
            settings:          None,
            kind:              DropdownRenderKind::Flat,
        }
    }

    /// Override the parent layout node (default `LayoutNodeId::ROOT`).
    pub fn parent(mut self, p: LayoutNodeId) -> Self { self.parent = p; self }

    /// Override the overlay slot id (default = handle id).
    pub fn slot_id(mut self, s: &'a str) -> Self { self.slot_id = Some(s); self }

    /// Anchor rect of the trigger button (re-positioning on viewport resize).
    pub fn anchor(mut self, r: Rect) -> Self { self.anchor = Some(r); self }

    /// Auto-anchor to a registered widget by id — at `.build()` time the
    /// builder looks up the widget's rect via the input coordinator and
    /// uses it as the anchor.  Equivalent to calling `.anchor(rect)` with
    /// the rect resolved from `coord.widget_rect(id)`.
    pub fn anchor_to(mut self, widget_id: &'a str) -> Self {
        self.anchor_widget_id = Some(widget_id);
        self
    }

    /// Explicit screen-space origin override (takes priority over anchor).
    pub fn origin(mut self, o: (f64, f64)) -> Self { self.position_override = Some(o); self }

    /// Explicit overlay rect override.
    pub fn rect(mut self, r: Rect) -> Self { self.overlay_rect = Some(r); self }

    /// Whether the dropdown is currently open (default `true`).
    pub fn open(mut self, on: bool) -> Self { self.open = on; self }

    /// Item rows (default empty).
    pub fn items(mut self, items: &'a [DropdownItem<'a>]) -> Self { self.items = items; self }

    /// Currently-hovered item id (default `None`).
    pub fn hovered_id(mut self, id: &'a str) -> Self { self.hovered_id = Some(id); self }

    /// Open submenu data: `(trigger_item_id, submenu_items)`.
    pub fn submenu(mut self, trigger_id: &'a str, items: &'a [DropdownItem<'a>]) -> Self {
        self.submenu = Some((trigger_id, items));
        self
    }

    /// Currently-hovered submenu item id (default `None`).
    pub fn submenu_hovered(mut self, id: &'a str) -> Self { self.submenu_hovered = Some(id); self }

    /// Submenu width strategy (`Auto` or `InheritParent`).
    pub fn submenu_width(mut self, w: SubmenuWidth) -> Self { self.submenu_width = w; self }

    /// Sizing mode (`AutoFit` measures content, `Fixed(w,h)` pins).
    pub fn size_mode(mut self, m: SizeMode) -> Self { self.size_mode = m; self }

    /// Body overflow strategy (default `Clip`).
    pub fn overflow(mut self, m: OverflowMode) -> Self { self.overflow = m; self }

    /// Override visual settings (default `DropdownSettings::default()`).
    pub fn settings(mut self, s: DropdownSettings) -> Self { self.settings = Some(s); self }

    /// Override render kind (default `DropdownRenderKind::Flat`).
    pub fn kind(mut self, k: DropdownRenderKind) -> Self { self.kind = k; self }

    /// Terminal call — register and draw the dropdown panel.
    pub fn build<P: DockPanel>(
        self,
        layout: &mut LayoutManager<P>,
        render: &mut dyn RenderContext,
    ) -> Option<DropdownNode> {
        let slot_id = self.slot_id
            .map(str::to_owned)
            .unwrap_or_else(|| self.handle.id_str().to_string());

        // Resolve anchor: explicit `.anchor(...)` wins; otherwise look up
        // the widget rect via coord using `.anchor_to(id)`.
        let resolved_anchor: Option<Rect> = self.anchor.or_else(|| {
            self.anchor_widget_id.and_then(|wid| {
                layout.ctx().input.widget_rect(&crate::types::unsafe_widget_id(wid))
            })
        });

        let overlay_rect = self.overlay_rect.unwrap_or_else(|| {
            let (x, y) = self.position_override
                .or_else(|| resolved_anchor.map(|a| (a.x, a.y + a.height)))
                .unwrap_or((0.0, 0.0));
            let (w, h) = match self.size_mode {
                SizeMode::Fixed(w, h) => (w, h),
                _                     => (200.0, 240.0),
            };
            Rect::new(x, y, w, h)
        });

        let mut view = DropdownView {
            anchor:            resolved_anchor,
            position_override: self.position_override,
            open:              self.open,
            kind:              DropdownViewKind::Flat {
                items:              self.items,
                hovered_id:         self.hovered_id,
                submenu_items:      self.submenu,
                submenu_hovered_id: self.submenu_hovered,
            },
            size_mode:    self.size_mode,
            overflow:     self.overflow,
            submenu_width:self.submenu_width,
        };

        let settings = self.settings.unwrap_or_else(|| dropdown_settings_from_styles(layout.styles()));

        register_layout_manager_dropdown(
            layout,
            render,
            self.parent,
            &slot_id,
            self.handle,
            overlay_rect,
            resolved_anchor,
            &mut view,
            &settings,
            self.kind,
        )
    }
}