File size: 11,066 Bytes
2c1d035 b01d918 2c1d035 b01d918 2c1d035 cfb1971 9ebca63 2c1d035 cfb1971 2c1d035 f3244ea 2c1d035 f6b4ee0 2c1d035 227ab63 2c1d035 b01d918 2c1d035 b01d918 2c1d035 cfb1971 2c1d035 | 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 | export function createReaderNavigation(readerContext) {
function beginReaderNavigation() {
if (readerContext.epubSeekFrame) cancelAnimationFrame(readerContext.epubSeekFrame);
readerContext.epubSeekFrame = 0;
readerContext.foliateScrollAnchors.invalidate();
return readerContext.nextReaderGeneration("navigation");
}
function clearReturnNavigation() {
try {
if (readerContext.returnHistoryKey) sessionStorage.removeItem(readerContext.returnHistoryKey);
const saved = JSON.parse(sessionStorage.getItem("reader-navigation-current") || "null");
if (saved && (saved.readerUrl === location.href || saved.shareUrl === location.href))
sessionStorage.removeItem("reader-navigation-current");
} catch (_) {}
}
// Only the search page's own Reader overlay handles these messages. Any other
// frame host (or a cross-origin one) would drop them, so navigate in place.
function isReaderOverlayFrame() {
try {
return (
window.parent !== window &&
window.parent.location.origin === location.origin &&
!!window.frameElement?.matches("iframe.reader-overlay")
);
} catch (_) {
return false;
}
}
function navigateReaderFolder() {
if (!readerContext.folderNavigationTarget) return;
if (isReaderOverlayFrame())
window.parent.postMessage(
{ type: "voice-reader-navigate", url: readerContext.folderNavigationTarget.href },
location.origin
);
else {
readerContext.clearReturnNavigation();
location.assign(readerContext.folderNavigationTarget.href);
}
}
function turnViewport(direction) {
readerContext.beginReaderNavigation();
const target = readerContext.htmlFrame?.contentWindow || readerContext.viewport;
target.scrollBy({
top:
Math.max(160, (readerContext.htmlFrame?.contentWindow?.innerHeight || readerContext.viewport.clientHeight) * 0.86) *
direction,
behavior: matchMedia("(prefers-reduced-motion: reduce)").matches ? "instant" : "smooth"
});
}
function handleReaderKeydown(event) {
if (
event.defaultPrevented ||
event.isComposing ||
event.altKey ||
event.ctrlKey ||
event.metaKey
)
return;
if (event.key === "Escape" && readerContext.panelState.open && readerContext.bookmarkPopover.hidden) {
event.preventDefault();
if (readerContext.readerUiHistoryState === "full-search") readerContext.closeFullSearchView();
else readerContext.setReaderPanelOpen(false, true);
return;
}
// Panel lists scroll independently. Inspect the composed path so a control
// inside a chapter Shadow DOM is not mistaken for the reading surface.
if ((event.composedPath?.() || [event.target]).some(node => node.closest?.(
'#history-panel,input,textarea,select,button,a,audio,video,[role="button"],[role="link"],[contenteditable]:not([contenteditable=false])'
)))
return;
if (["PageDown", " ", "ArrowDown", "PageUp", "ArrowUp"].includes(event.key)) {
event.preventDefault();
readerContext.turnViewport(
["PageUp", "ArrowUp"].includes(event.key) || (event.key === " " && event.shiftKey) ? -1 : 1
);
}
}
function handleReaderOutsideClick(event) {
if (readerContext.readerLifecycle.disposed || readerContext.readerAbortController.signal.aborted ||
!readerContext.panelState.open || !readerContext.bookmarkPopover.hidden) return;
const path = event.composedPath();
if (path.includes(document.querySelector("#history-panel")) || path.includes(document.querySelector("#history")) ||
path.includes(readerContext.bookmarkPopover) || path.includes(readerContext.bookmarkRibbon)) return;
// Do not consume the content click or move focus: text selection and book
// links keep their ordinary behavior, including inside the HTML iframe.
readerContext.setReaderPanelOpen(false);
}
function readerPageScrollTop(shell) {
return readerContext.viewport.scrollTop + shell.getBoundingClientRect().top -
readerContext.viewport.getBoundingClientRect().top - readerContext.viewport.clientTop;
}
async function goToPage(value, generation = readerContext.beginReaderNavigation()) {
try {
if (!readerContext.documentState.pageCount || !readerContext.isReaderGenerationCurrent("navigation", generation))
return false;
const page = VoiceOfMLReader.clampNumber(value, 1, readerContext.documentState.pageCount, 1);
readerContext.pdfShellWindow?.ensure(page);
let shell = readerContext.content.querySelector(
`.reader-page[data-page="${page}"]`
);
if (!shell && ["pdf-pages", "image-pages"].includes(readerContext.capability.mode)) {
await readerContext.pdfShellsReady;
shell = readerContext.content.querySelector(`.reader-page[data-page="${page}"]`);
}
if (!readerContext.isReaderGenerationCurrent("navigation", generation)) return false;
if (!shell) return false;
const imagePage = ["pdf-pages", "image-pages"].includes(readerContext.capability.mode);
if (imagePage && shell.dataset.renderState !== "rendered")
readerContext.prioritizePdfManifestPrefetch(readerContext.pdfPageManifest?.pageUrl(page));
const pendingPdf =
!imagePage && shell.classList.contains("reader-page")
? readerContext.renderPdfInBackground(shell, false, true)
: null;
if (!readerContext.isReaderGenerationCurrent("navigation", generation)) return false;
readerContext.viewport.scrollTop = readerContext.readerPageScrollTop(shell);
if (imagePage && shell.dataset.renderState === "rendered") readerContext.renderPdfOcrText(shell);
readerContext.pageNavigationLockUntil = performance.now() + 500;
if (pendingPdf) readerContext.cancelSpeculativePdfRenders(shell);
const pendingImage = imagePage ? readerContext.renderPdfInBackground(shell, false, true) : null;
if (imagePage && shell.dataset.renderState !== "rendered") readerContext.cancelSpeculativePdfRenders(shell);
readerContext.updateDocumentState({ page });
readerContext.pageInput.value = String(page);
readerContext.updateTocCurrentMark();
readerContext.updateProgressTools();
pendingPdf?.catch(() => {});
pendingImage?.catch(() => {});
if (!readerContext.isReaderGenerationCurrent("navigation", generation)) return false;
readerContext.scheduleSave();
return true;
} catch (error) {
readerContext.handlePageNavigationFailure(error, generation);
return false;
}
}
function handleReaderPositionChange() {
if (readerContext.readerAbortController.signal.aborted) return;
readerContext.notePdfViewportMotion?.();
if (readerContext.viewport.scrollTop !== readerContext.pdfLastScrollTop) readerContext.pdfScrollDirection = readerContext.viewport.scrollTop > readerContext.pdfLastScrollTop ? 1 : -1;
readerContext.pdfLastScrollTop = readerContext.viewport.scrollTop;
readerContext.pdfShellWindow?.schedule();
readerContext.scheduleVisiblePdfRenderReconciliation?.(true);
readerContext.scheduleMarkerSync();
readerContext.scheduleFoliateScrollSync();
readerContext.foliateScrollAnchors.remember();
}
async function navigateReader(rawUrl, bookmark = null) {
let target;
try {
target = new URL(rawUrl, location.origin);
if (
target.origin !== location.origin ||
target.pathname !== "/static/reader.html" ||
target.username ||
target.password
)
return;
target.searchParams.delete("bookmark");
target.searchParams.delete("bookmark_source");
if (bookmark) {
if (
typeof bookmark.id !== "string" ||
!bookmark.id ||
typeof bookmark.url !== "string" ||
!bookmark.url
)
return;
target.searchParams.set("bookmark", bookmark.id);
target.searchParams.set("bookmark_source", bookmark.url);
}
} catch (_) {
return;
}
const generation = readerContext.beginReaderNavigation();
await readerContext.saveProgress();
if (!readerContext.isReaderGenerationCurrent("navigation", generation)) return;
if (isReaderOverlayFrame())
window.parent.postMessage({ type: "voice-reader-open", url: target.href }, location.origin);
else location.assign(target.href);
}
function notePdfScrollIntent() {
readerContext.pdfUserHasScrolled = true;
readerContext.beginReaderNavigation();
}
function installReaderTapSelectionClear(region, eventRoot = region.ownerDocument) {
let tap = null;
const down = (event) => {
tap = null;
if (event.pointerType !== "touch" || !event.isPrimary) return;
const target = event.composedPath()[0];
if (target.closest?.("a,button,input,textarea,select,[contenteditable]")) return;
const root = target.getRootNode();
const selection = root.getSelection?.() || eventRoot.getSelection();
if (!selection || selection.isCollapsed || !selection.rangeCount) return;
tap = { id: event.pointerId, x: event.clientX, y: event.clientY, time: performance.now(),
selection, anchor: selection.anchorNode, anchorOffset: selection.anchorOffset,
focus: selection.focusNode, focusOffset: selection.focusOffset };
};
const move = (event) => {
if (tap && event.pointerId === tap.id && Math.hypot(event.clientX - tap.x, event.clientY - tap.y) > 8)
tap = null;
};
const up = (event) => {
const start = tap;
tap = null;
if (!start || event.pointerId !== start.id || performance.now() - start.time > 300 ||
Math.hypot(event.clientX - start.x, event.clientY - start.y) > 8) return;
const selection = start.selection;
if (selection.anchorNode === start.anchor && selection.anchorOffset === start.anchorOffset &&
selection.focusNode === start.focus && selection.focusOffset === start.focusOffset)
selection.removeAllRanges();
};
const cancel = () => { tap = null; };
region.addEventListener("pointerdown", down, { passive: true });
eventRoot.addEventListener("pointermove", move, { passive: true });
eventRoot.addEventListener("pointerup", up, { passive: true });
eventRoot.addEventListener("pointercancel", cancel, { passive: true });
readerContext.trackReaderResource(() => {
region.removeEventListener("pointerdown", down);
eventRoot.removeEventListener("pointermove", move);
eventRoot.removeEventListener("pointerup", up);
eventRoot.removeEventListener("pointercancel", cancel);
tap = null;
});
}
return {
beginReaderNavigation,
clearReturnNavigation,
isReaderOverlayFrame,
navigateReaderFolder,
turnViewport,
handleReaderKeydown,
handleReaderOutsideClick,
readerPageScrollTop,
goToPage,
handleReaderPositionChange,
navigateReader,
notePdfScrollIntent,
installReaderTapSelectionClear
};
}
|