@nativescript/core/ui/core/view/overflow-edges.android.js

A JavaScript library providing an easy to use api for interacting with iOS and Android platform APIs.

/**
 * Internal helper for the `androidOverflowEdge` property. Kept out of index.android.ts
 * so the parsing can be unit tested without pulling the whole view stack in.
 *
 * The values mirror org.nativescript.widgets.LayoutBase.
 */
export const OverflowEdgeIgnore = -1;
export const OverflowEdgeNone = 0;
export const OverflowEdgeLeft = 1 << 1;
export const OverflowEdgeTop = 1 << 2;
export const OverflowEdgeRight = 1 << 3;
export const OverflowEdgeBottom = 1 << 4;
export const OverflowEdgeDontApply = 1 << 5;
export const OverflowEdgeLeftDontConsume = 1 << 6;
export const OverflowEdgeTopDontConsume = 1 << 7;
export const OverflowEdgeRightDontConsume = 1 << 8;
export const OverflowEdgeBottomDontConsume = 1 << 9;
export const OverflowEdgeAllButLeft = 1 << 10;
export const OverflowEdgeAllButTop = 1 << 11;
export const OverflowEdgeAllButRight = 1 << 12;
export const OverflowEdgeAllButBottom = 1 << 13;
/**
 * Not an edge: a modifier that folds the display cutout into the insets being
 * distributed. Type.systemBars() leaves the cutout out, which only shows up once the
 * device is rotated and the camera moves to an edge that has no bar.
 */
export const OverflowEdgeCutout = 1 << 14;
const edgeMap = {
    none: OverflowEdgeNone,
    ignore: OverflowEdgeIgnore,
    left: OverflowEdgeLeft,
    top: OverflowEdgeTop,
    right: OverflowEdgeRight,
    bottom: OverflowEdgeBottom,
    'dont-apply': OverflowEdgeDontApply,
    'left-dont-consume': OverflowEdgeLeftDontConsume,
    'top-dont-consume': OverflowEdgeTopDontConsume,
    'right-dont-consume': OverflowEdgeRightDontConsume,
    'bottom-dont-consume': OverflowEdgeBottomDontConsume,
    'all-but-left': OverflowEdgeAllButLeft,
    'all-but-top': OverflowEdgeAllButTop,
    'all-but-right': OverflowEdgeAllButRight,
    'all-but-bottom': OverflowEdgeAllButBottom,
    cutout: OverflowEdgeCutout,
};
/**
 * Turns a comma separated `androidOverflowEdge` value into the flags LayoutBase expects.
 * Returns null when nothing in the value was recognized, which means "leave the view alone".
 */
export function parseEdges(edges) {
    let result = 0;
    let matched = false;
    for (const raw of edges.split(',')) {
        const value = edgeMap[raw.trim()];
        if (value === undefined) {
            continue;
        }
        matched = true;
        // `dont-apply` and `ignore` are sentinels rather than bit flags, so OR-ing them
        // with an edge would corrupt both. The first one wins outright - which also means
        // `cutout` alongside either of them is dropped. `dont-apply` hands the raw cutout
        // values to JS regardless, and `ignore` distributes nothing at all.
        if (value === OverflowEdgeDontApply || value === OverflowEdgeIgnore) {
            return value;
        }
        result |= value;
    }
    // A value that legitimately resolves to none (0) still has to be applied, otherwise
    // setting the property to e.g. 'none,none' would be a silent no-op that strands the
    // view on the edges it had before.
    return matched ? result : null;
}
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