generated from dellevin/template
88 lines
3.5 KiB
Dart
88 lines
3.5 KiB
Dart
import 'dart:convert';
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import 'webview_bridge.dart';
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/// Typed Dart mirror of the TypeScript `ReaderApi` interface
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/// (`web_assets/controller.js/api.ts`).
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///
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/// Every public method corresponds 1-to-1 with its TypeScript counterpart.
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/// The token parameter is managed internally by [WebViewBridge] — callers
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/// never touch raw token integers through this class.
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///
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/// Methods that return `Future<int>` fire the JS call and return a token the
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/// caller can later pass to [WebViewBridge.waitForEvent] / [waitForEvents]
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/// when it wants to batch-await multiple operations together.
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///
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/// Methods that return `Future<void>` fire the JS call and await its
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/// completion before returning.
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class ReaderApi {
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final WebViewBridge _bridge;
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ReaderApi(this._bridge);
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// ─── Token-based (deferred await) ──────────────────────────────────
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/// Loads [url] into the iframe identified by [slot].
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/// [anchors] should be a JSON-encoded list: `'["id1","id2"]'`.
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Future<int> loadFrame(
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String slot,
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String url,
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String anchors,
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String properties,
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) => _bridge.call(
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(t) => "window.api.loadFrame($t, '$slot', '$url', $anchors, $properties)",
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);
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/// Scrolls [slot]'s iframe to [pageIndex] without immediately awaiting.
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Future<int> jumpToPageFor(String slot, int pageIndex) =>
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_bridge.call((t) => "window.api.jumpToPageFor($t, '$slot', $pageIndex)");
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/// Scrolls [slot]'s iframe to its last page without immediately awaiting.
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Future<int> jumpToLastPageOfFrame(String slot) =>
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_bridge.call((t) => "window.api.jumpToLastPageOfFrame($t, '$slot')");
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/// Rotates the iframe triple in [direction] (`'next'` or `'prev'`).
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Future<int> cycleFrames(String direction) =>
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_bridge.call((t) => "window.api.cycleFrames($t, '$direction')");
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// ─── Fire-and-await ────────────────────────────────────────────────
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/// Scrolls the current iframe to [pageIndex] and awaits completion.
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Future<void> jumpToPage(int pageIndex) =>
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_bridge.callAndWait((t) => 'window.api.jumpToPage($t, $pageIndex)', 1000);
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/// Restores the scroll position using a fractional [ratio] in [0,1].
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Future<void> restoreScrollPosition(double ratio) => _bridge.callAndWait(
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(t) => 'window.api.restoreScrollPosition($t, $ratio)',
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1000,
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);
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/// Waits for the current frame to finish rendering.
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Future<void> waitForRender() =>
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_bridge.callAndWait((t) => 'window.api.waitForRender($t)', 1000);
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/// Updates the reader theme/layout and awaits completion.
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///
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/// [theme] must be a JSON-serialisable map produced by `EpubTheme.toMap()`.
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Future<void> updateTheme(
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double viewWidth,
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double viewHeight,
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Map<String, dynamic> theme,
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) {
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final themeJson = jsonEncode(theme);
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return _bridge.callAndWait(
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(t) => 'window.api.updateTheme($t, $viewWidth, $viewHeight, $themeJson)',
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);
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}
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// ─── Fire-and-forget ───────────────────────────────────────────────
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/// Checks whether there is an interactive element (image, etc.) at (x, y).
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Future<void> checkLongPressElementAt(double x, double y) =>
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_bridge.evaluate('window.api.checkLongPressElementAt($x, $y)');
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/// Checks whether the tap at (x, y) hits a link, footnote, or other element.
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Future<void> checkTapElementAt(double x, double y) =>
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_bridge.evaluate('window.api.checkTapElementAt($x, $y)');
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}
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