Orkuncakilkaya
66a2bc2214
A `view Name { field = x; function q(..); on e(..) }` declaration is the one bridge between a
program and its UI: it writes view_<name>() -> UiView, whose model is a Value of every field and
whose call runs a query or an event by name.
ludic.ui is a template runtime:
- HTML-shaped XML screens and components, loaded at run time;
- {expression} bindings, if/else/each, props, slots, per-instance state;
- on-press / onclick actions (event, set, emit);
- component libraries (export="true", <import src as>).
Styling:
- stylesheets in <style> or importable .lss files (@import);
- CSS selectors (#id, .class, [attr=v], descendant and > combinators, :hover, :disabled,
:first-child, :last-child, :nth-child, :not) weighed by specificity;
- the box model and flex under CSS's property names.
Also:
- default parameters, and positional-then-named calls;
- Value gains a float kind;
- a function shadowing a runtime one is refused;
- an index is evaluated before the slice is read;
- runtime errors name the right file.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
34 lines
1.1 KiB
Text
34 lines
1.1 KiB
Text
# state.ludic - a component's or a screen's own values, <state name="{first}"/>, kept from frame
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# to frame by where the instance is in the tree, and set by `set name = value`
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var st_keys: []string = new []string
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var st_vals: []Val = new []Val
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function st_for(key: string, t: UiTpl, e: UiEnv) -> Val {
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var decl: UiTpl = null
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for i in 0 .. len(t.kids) {
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if t.kids[i].tag == "state" { decl = t.kids[i] }
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}
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if decl == null { return null }
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for i in 0 .. len(st_keys) {
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if st_keys[i] == key { return st_vals[i] }
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}
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let o = Value.object()
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for i in 0 .. len(decl.keys) { Value.put(o, decl.keys[i], ui_eval(decl.vals[i], e)) }
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push(st_keys, key)
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push(st_vals, o)
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return o
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}
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# a screen's state starts again the next time it opens
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export function ui_forget(screen: string) -> void {
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let keys = new []string
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let vals = new []Val
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for i in 0 .. len(st_keys) {
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let k = st_keys[i]
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let mine = len(k) >= len(screen) and k[0..len(screen)] == screen and (len(k) == len(screen) or k[len(screen)] == 47)
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if not mine {
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push(keys, k)
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push(vals, st_vals[i])
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}
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}
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st_keys = keys
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st_vals = vals
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}
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