71 lines
2.2 KiB
Rust
71 lines
2.2 KiB
Rust
/// applies the editor's layout diffs. each diff is comprised of a widget_path and a new_value. empty path = swap the whole layout.
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/// otherwise, descend one step each index. tables descend through [row, col] indexed cells.
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use graphite_editor::messages::layout::utility_types::widget_prelude::*;
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use std::collections::HashMap;
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#[derive(Default)]
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pub struct LayoutStore {
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layouts: HashMap<LayoutTarget, Layout>,
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}
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impl LayoutStore {
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pub fn apply(&mut self, target: LayoutTarget, diff: WidgetDiff) {
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let layout = self.layouts.entry(target).or_default();
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apply_diff_layout(layout, &diff.widget_path, diff.new_value);
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}
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pub fn get(&self, target: LayoutTarget) -> Option<&Layout> {
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self.layouts.get(&target)
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}
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pub fn iter(&self) -> impl Iterator<Item = (&LayoutTarget, &Layout)> {
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self.layouts.iter()
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}
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}
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fn apply_diff_layout(layout: &mut Layout, path: &[usize], new_value: DiffUpdate) {
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let Some((first, rest)) = path.split_first() else {
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if let DiffUpdate::Layout(new) = new_value {
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*layout = new;
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}
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return;
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};
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if let Some(group) = layout.0.get_mut(*first) {
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apply_diff_group(group, rest, new_value);
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}
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}
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fn apply_diff_group(group: &mut LayoutGroup, path: &[usize], new_value: DiffUpdate) {
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let Some((first, rest)) = path.split_first() else {
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if let DiffUpdate::LayoutGroup(new) = new_value {
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*group = new;
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}
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return;
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};
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match group {
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LayoutGroup::Column(WidgetColumn { widgets }) => apply_diff_instance(widgets.get_mut(*first), rest, new_value),
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LayoutGroup::Row(WidgetRow { widgets }) => apply_diff_instance(widgets.get_mut(*first), rest, new_value),
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LayoutGroup::Section(WidgetSection { layout, .. }) => {
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if let Some(child) = layout.0.get_mut(*first) {
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apply_diff_group(child, rest, new_value);
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}
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}
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LayoutGroup::Table(WidgetTable { rows, .. }) => {
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if let Some(table_row) = rows.get_mut(*first)
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&& let Some((col, rest_after_col)) = rest.split_first()
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{
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apply_diff_instance(table_row.get_mut(*col), rest_after_col, new_value);
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}
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}
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}
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}
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fn apply_diff_instance(slot: Option<&mut WidgetInstance>, rest: &[usize], new_value: DiffUpdate) {
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if !rest.is_empty() {
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return;
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}
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if let (Some(slot), DiffUpdate::Widget(new)) = (slot, new_value) {
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*slot = new;
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}
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}
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