feat(reader): in-book search for PDFs
PDFs have fully searchable text (pdf.js text layer) — the previous
reflowable-only gate existed only because foliate's generic search
needs DOM documents that PDF sections don't provide. This adds a PDF
pipeline alongside it:
- Fork d065495 exposes the pdf.js document proxy as book.pdf so the
host can drive text extraction directly.
- New web/src/reader/pdf-search.ts: extractPdfPages() pulls each
page's textContent with item geometry (progress-reported, cached
after first search). PDF text items often omit inter-word spaces
(gaps are positional), so pages are joined gap-aware — baseline
changes, hasEOL, or horizontal gaps past a font-size threshold
become spaces — recording a char→item map. searchPdfPages() does
case-insensitive matching over the joined text and maps each hit
back to the page-fraction rects of the items it spans, with
ellipsized pre/match/post excerpts. Pure functions, unit-sanity
checked (cross-item 'brave new' → two rects).
- runSearch branches: EPUB keeps foliate's DOM search; PDFs search
the extracted pages, group hits per page ('Page 12'), and render
on-page hit rectangles through the existing fraction-rect overlay
(addRectAnnotation) — which re-render automatically when pages
revisit, same as highlights. Clearing the query removes them.
- Results navigate by page index; the 🔍 button and '/' shortcut now
appear for PDFs too (comics remain without searchable text).
This commit is contained in:
+1
-1
@@ -12,7 +12,7 @@
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"dev": "npm run build:ts:dev && npm run build:css"
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},
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"dependencies": {
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"@bookhoard/foliate-js": "git+https://github.com/john-okeefe/foliate-js.git#1c0ebf3",
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"@bookhoard/foliate-js": "git+https://github.com/john-okeefe/foliate-js.git#d065495",
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"alpinejs": "^3.15.8",
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"chart.js": "^4.5.1",
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"highlight.js": "^11.11.1",
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@@ -246,7 +246,7 @@ templ ReaderChrome(metadata ReaderMetadata, progress ReadingProgress) {
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<h1 class="text-base sm:text-lg font-semibold hidden sm:block sm:truncate">{ metadata.Title }</h1>
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<div class="flex items-center gap-1">
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<button @click="addBookmark()" class="p-1.5 sm:p-2 rounded-lg hover:bg-gray-700" title="Bookmark this position (b)">🏷️</button>
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<button x-show="!isFixedLayout" @click="toggleSearch()" class="p-1.5 sm:p-2 rounded-lg hover:bg-gray-700" title="Search (/)">🔍</button>
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<button x-show="!isFixedLayout || isPDF" @click="toggleSearch()" class="p-1.5 sm:p-2 rounded-lg hover:bg-gray-700" title="Search (/)">🔍</button>
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<button @click="toggleBookmarks()" class="p-1.5 sm:p-2 rounded-lg hover:bg-gray-700" title="Annotations">📝</button>
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<button @click="toggleSettings()" class="p-1.5 sm:p-2 rounded-lg hover:bg-gray-700" title="Settings (s)">Aa</button>
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</div>
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@@ -541,10 +541,10 @@ templ ReaderSearchDrawer() {
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<div class="mb-3">
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<div class="text-xs font-semibold uppercase tracking-wide mb-1" style="color: var(--text-secondary)" x-text="group.label"></div>
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<div class="space-y-1">
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<template x-for="item in group.items" :key="item.cfi">
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<template x-for="(item, si) in group.items" :key="gi + '-' + si">
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<a
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href="#"
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@click.prevent="goToSearchResult(item.cfi)"
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@click.prevent="goToSearchResult(item)"
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class="search-result"
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>
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<span x-text="item.pre"></span><mark x-text="item.match"></mark><span x-text="item.post"></span>
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@@ -220,7 +220,7 @@ func ReaderChrome(metadata ReaderMetadata, progress ReadingProgress) templ.Compo
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if templ_7745c5c3_Err != nil {
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return templ_7745c5c3_Err
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}
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templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 13, "</h1><div class=\"flex items-center gap-1\"><button @click=\"addBookmark()\" class=\"p-1.5 sm:p-2 rounded-lg hover:bg-gray-700\" title=\"Bookmark this position (b)\">🏷️</button> <button x-show=\"!isFixedLayout\" @click=\"toggleSearch()\" class=\"p-1.5 sm:p-2 rounded-lg hover:bg-gray-700\" title=\"Search (/)\">🔍</button> <button @click=\"toggleBookmarks()\" class=\"p-1.5 sm:p-2 rounded-lg hover:bg-gray-700\" title=\"Annotations\">📝</button> <button @click=\"toggleSettings()\" class=\"p-1.5 sm:p-2 rounded-lg hover:bg-gray-700\" title=\"Settings (s)\">Aa</button></div></div></div><!-- Bottom bar --><div id=\"reader-bottombar\" class=\"fixed bottom-0 left-0 right-0 border-t z-40 pb-[env(safe-area-inset-bottom)] reader-glass\"><!-- Reflowable row --><div x-show=\"!isFixedLayout\" class=\"flex items-center px-1.5 py-1.5 gap-0.5 sm:px-2 sm:py-2 sm:gap-1\"><button @click=\"goLeft()\" class=\"p-1.5 sm:p-2 rounded-lg hover:bg-gray-700\" title=\"Go Left\" aria-label=\"Go left\"><svg class=\"reader-icon\" width=\"24\" height=\"24\" aria-hidden=\"true\"><path d=\"M 15 6 L 9 12 L 15 18\"></path></svg></button> <input id=\"progress-slider\" type=\"range\" min=\"0\" max=\"1\" step=\"any\" list=\"tick-marks\" @input=\"goToFraction($event.target.value)\" class=\"grow\"> <datalist id=\"tick-marks\"></datalist> <button @click=\"goRight()\" class=\"p-1.5 sm:p-2 rounded-lg hover:bg-gray-700\" title=\"Go Right\" aria-label=\"Go right\"><svg class=\"reader-icon\" width=\"24\" height=\"24\" aria-hidden=\"true\"><path d=\"M 9 6 L 15 12 L 9 18\"></path></svg></button><div class=\"w-px h-6 mx-1 reader-sep\"></div><div id=\"progress-display\" @click=\"cycleProgressMode()\" :title=\"progressTooltip()\" class=\"text-sm min-w-[4rem] max-w-[5rem] sm:max-w-none text-center cursor-pointer truncate whitespace-nowrap overflow-hidden\"><span class=\"hidden sm:inline\" x-text=\"progressLabel\"></span><span x-text=\"progressMain\">")
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templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 13, "</h1><div class=\"flex items-center gap-1\"><button @click=\"addBookmark()\" class=\"p-1.5 sm:p-2 rounded-lg hover:bg-gray-700\" title=\"Bookmark this position (b)\">🏷️</button> <button x-show=\"!isFixedLayout || isPDF\" @click=\"toggleSearch()\" class=\"p-1.5 sm:p-2 rounded-lg hover:bg-gray-700\" title=\"Search (/)\">🔍</button> <button @click=\"toggleBookmarks()\" class=\"p-1.5 sm:p-2 rounded-lg hover:bg-gray-700\" title=\"Annotations\">📝</button> <button @click=\"toggleSettings()\" class=\"p-1.5 sm:p-2 rounded-lg hover:bg-gray-700\" title=\"Settings (s)\">Aa</button></div></div></div><!-- Bottom bar --><div id=\"reader-bottombar\" class=\"fixed bottom-0 left-0 right-0 border-t z-40 pb-[env(safe-area-inset-bottom)] reader-glass\"><!-- Reflowable row --><div x-show=\"!isFixedLayout\" class=\"flex items-center px-1.5 py-1.5 gap-0.5 sm:px-2 sm:py-2 sm:gap-1\"><button @click=\"goLeft()\" class=\"p-1.5 sm:p-2 rounded-lg hover:bg-gray-700\" title=\"Go Left\" aria-label=\"Go left\"><svg class=\"reader-icon\" width=\"24\" height=\"24\" aria-hidden=\"true\"><path d=\"M 15 6 L 9 12 L 15 18\"></path></svg></button> <input id=\"progress-slider\" type=\"range\" min=\"0\" max=\"1\" step=\"any\" list=\"tick-marks\" @input=\"goToFraction($event.target.value)\" class=\"grow\"> <datalist id=\"tick-marks\"></datalist> <button @click=\"goRight()\" class=\"p-1.5 sm:p-2 rounded-lg hover:bg-gray-700\" title=\"Go Right\" aria-label=\"Go right\"><svg class=\"reader-icon\" width=\"24\" height=\"24\" aria-hidden=\"true\"><path d=\"M 9 6 L 15 12 L 9 18\"></path></svg></button><div class=\"w-px h-6 mx-1 reader-sep\"></div><div id=\"progress-display\" @click=\"cycleProgressMode()\" :title=\"progressTooltip()\" class=\"text-sm min-w-[4rem] max-w-[5rem] sm:max-w-none text-center cursor-pointer truncate whitespace-nowrap overflow-hidden\"><span class=\"hidden sm:inline\" x-text=\"progressLabel\"></span><span x-text=\"progressMain\">")
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if templ_7745c5c3_Err != nil {
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return templ_7745c5c3_Err
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}
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@@ -423,7 +423,7 @@ func ReaderSearchDrawer() templ.Component {
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if templ_7745c5c3_Err != nil {
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return templ_7745c5c3_Err
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}
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templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 20, "<div class=\"reader-search-bar\"><input type=\"search\" x-ref=\"searchInput\" x-model=\"searchQuery\" @keydown.enter.prevent=\"runSearch()\" placeholder=\"Search in book…\" class=\"reader-note-input grow\" aria-label=\"Search query\"> <button x-show=\"searchQuery || searchGroups.length\" @click=\"searchQuery = ''; clearSearchResults()\" class=\"p-2 rounded-lg hover:bg-gray-700 shrink-0\" title=\"Clear results\" aria-label=\"Clear results\">✕</button></div><div class=\"reader-search-status\" x-show=\"searchQuery || searching || searchGroups.length\"><span x-show=\"searching\" x-text=\"'Searching… ' + Math.round(searchProgress * 100) + '%'\">Searching…</span> <span x-show=\"!searching && searchGroups.length\" x-text=\"searchMatchCount + ' match' + (searchMatchCount === 1 ? '' : 'es')\">0 matches</span> <span x-show=\"!searching && searchQuery && !searchGroups.length\">No matches</span></div><div class=\"reader-drawer-body\"><template x-for=\"(group, gi) in searchGroups\" :key=\"gi\"><div class=\"mb-3\"><div class=\"text-xs font-semibold uppercase tracking-wide mb-1\" style=\"color: var(--text-secondary)\" x-text=\"group.label\"></div><div class=\"space-y-1\"><template x-for=\"item in group.items\" :key=\"item.cfi\"><a href=\"#\" @click.prevent=\"goToSearchResult(item.cfi)\" class=\"search-result\"><span x-text=\"item.pre\"></span><mark x-text=\"item.match\"></mark><span x-text=\"item.post\"></span></a></template></div></div></template></div>")
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templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 20, "<div class=\"reader-search-bar\"><input type=\"search\" x-ref=\"searchInput\" x-model=\"searchQuery\" @keydown.enter.prevent=\"runSearch()\" placeholder=\"Search in book…\" class=\"reader-note-input grow\" aria-label=\"Search query\"> <button x-show=\"searchQuery || searchGroups.length\" @click=\"searchQuery = ''; clearSearchResults()\" class=\"p-2 rounded-lg hover:bg-gray-700 shrink-0\" title=\"Clear results\" aria-label=\"Clear results\">✕</button></div><div class=\"reader-search-status\" x-show=\"searchQuery || searching || searchGroups.length\"><span x-show=\"searching\" x-text=\"'Searching… ' + Math.round(searchProgress * 100) + '%'\">Searching…</span> <span x-show=\"!searching && searchGroups.length\" x-text=\"searchMatchCount + ' match' + (searchMatchCount === 1 ? '' : 'es')\">0 matches</span> <span x-show=\"!searching && searchQuery && !searchGroups.length\">No matches</span></div><div class=\"reader-drawer-body\"><template x-for=\"(group, gi) in searchGroups\" :key=\"gi\"><div class=\"mb-3\"><div class=\"text-xs font-semibold uppercase tracking-wide mb-1\" style=\"color: var(--text-secondary)\" x-text=\"group.label\"></div><div class=\"space-y-1\"><template x-for=\"(item, si) in group.items\" :key=\"gi + '-' + si\"><a href=\"#\" @click.prevent=\"goToSearchResult(item)\" class=\"search-result\"><span x-text=\"item.pre\"></span><mark x-text=\"item.match\"></mark><span x-text=\"item.post\"></span></a></template></div></div></template></div>")
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if templ_7745c5c3_Err != nil {
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return templ_7745c5c3_Err
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}
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@@ -0,0 +1,163 @@
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// PDF in-book search: text extraction with item geometry, and a matcher
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// that maps hits back to page-fraction rects for the overlay renderer.
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//
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// pdf.js text items carry positional data (transform/width/height in PDF
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// units at scale 1) but their strings often omit inter-word spaces — gaps
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// are positional. Pages are therefore joined gap-aware, with a char→item
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// map so each match can be covered by the rects of the items it spans.
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export interface PdfSearchItem {
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/** page-fraction rect of this text item */
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x: number;
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y: number;
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w: number;
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h: number;
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/** char offset of this item's text within the page string */
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start: number;
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length: number;
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}
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export interface PdfPageText {
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index: number;
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/** normalized, gap-joined page text (lowercased by the matcher) */
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text: string;
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items: PdfSearchItem[];
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}
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export interface PdfSearchHit {
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page: number;
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rects: number[][];
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pre: string;
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match: string;
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post: string;
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}
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interface RawItem {
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str: string;
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transform: number[];
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width: number;
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height: number;
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hasEOL: boolean;
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}
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/** Join one page's text items into a searchable string + item map. */
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export function buildPageText(
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rawItems: RawItem[],
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viewportWidth: number,
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viewportHeight: number,
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index: number,
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): PdfPageText {
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const vw = viewportWidth || 1;
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const vh = viewportHeight || 1;
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let text = "";
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const items: PdfSearchItem[] = [];
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let prevRight: number | null = null;
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let prevBaseline: number | null = null;
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for (const item of rawItems) {
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if (!item.str) continue;
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const t = item.transform ?? [1, 0, 0, 1, 0, 0];
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const baseline = t[5] ?? 0;
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const x = t[4] ?? 0;
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const size =
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Math.abs(item.height) || Math.abs(t[3]) || Math.abs(t[0]) || 10;
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const w = Math.abs(item.width) || 0;
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const h = size;
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let sep = "";
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if (text && !text.endsWith(" ") && prevRight != null) {
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const newLine =
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item.hasEOL ||
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prevBaseline == null ||
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Math.abs(baseline - prevBaseline) > size * 0.5;
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const gap = x - prevRight;
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if (newLine || gap > size * 0.2) sep = " ";
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}
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const s = item.str.replace(/\s+/g, " ");
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const start = text.length + sep.length;
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text += sep + s;
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items.push({
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x: x / vw,
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y: (vh - baseline - h) / vh,
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w: w / vw,
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h: h / vh,
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start,
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length: s.length,
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});
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prevRight = x + w;
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prevBaseline = baseline;
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}
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return { index, text: text.trimStart(), items };
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}
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/** Extract all pages of a PDF via pdf.js, reporting progress 0..1. */
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export async function extractPdfPages(
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pdf: any,
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onProgress?: (fraction: number) => void,
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): Promise<PdfPageText[]> {
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const pages: PdfPageText[] = [];
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const num = pdf.numPages as number;
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for (let i = 0; i < num; i++) {
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const page = await pdf.getPage(i + 1);
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const viewport = page.getViewport({ scale: 1 });
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const tc = await page.getTextContent();
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pages.push(
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buildPageText(tc.items, viewport.width, viewport.height, i),
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);
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onProgress?.((i + 1) / num);
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}
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return pages;
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}
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const CONTEXT = 60;
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/**
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* Case-insensitive search over extracted pages. Returns hits grouped in
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* page order; each hit carries the page-fraction rects of the items it
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* spans (capped to keep pathological fills cheap) plus a trimmed excerpt.
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*/
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export function searchPdfPages(
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pages: PdfPageText[],
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query: string,
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locales = "en",
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): PdfSearchHit[] {
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const needle = query.toLocaleLowerCase(locales).replace(/\s+/g, " ").trim();
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if (!needle) return [];
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const hits: PdfSearchHit[] = [];
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for (const page of pages) {
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const haystack = page.text.toLocaleLowerCase(locales);
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let from = 0;
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for (;;) {
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const s = haystack.indexOf(needle, from);
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if (s === -1) break;
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const e = s + needle.length;
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from = s + Math.max(1, needle.length);
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const rects: number[][] = [];
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for (const it of page.items) {
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if (it.length <= 0) continue;
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if (it.start + it.length <= s || it.start >= e) continue;
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if (rects.length >= 12) break;
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rects.push([it.x, it.y, it.w, it.h]);
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}
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if (!rects.length) continue;
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const pre = page.text.slice(Math.max(0, s - CONTEXT), s);
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const post = page.text.slice(e, e + CONTEXT);
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hits.push({
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page: page.index,
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rects,
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pre: (s > CONTEXT ? "…" : "") + pre.trimStart(),
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match: page.text.slice(s, e),
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post: post.trimEnd() + (page.text.length > e + CONTEXT ? "…" : ""),
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});
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}
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}
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return hits;
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}
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+89
-24
@@ -4,6 +4,11 @@ import { Overlayer } from "@bookhoard/foliate-js/overlayer.js";
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import { Alpine } from "../alpine";
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import { loadSettings, saveSettings } from "./settings-manager";
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import { getToken } from "../storage";
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import {
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extractPdfPages,
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searchPdfPages,
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type PdfPageText,
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} from "./pdf-search";
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const HIGHLIGHT_COLORS = [
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"#ffd54f",
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@@ -410,6 +415,8 @@ document.addEventListener("alpine:init", () => {
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searchProgress: 0,
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searching: false,
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searchGen: 0,
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pdfPagesCache: null as PdfPageText[] | null,
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pdfSearchKeys: [] as string[],
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selectionPopover: {
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open: false,
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mode: "create" as "create" | "edit",
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@@ -1441,7 +1448,9 @@ document.addEventListener("alpine:init", () => {
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this.bookmarksOpen = opening;
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},
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toggleSearch() {
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if (this.isFixedLayout) return; // search requires reflowable text
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// Reflowable books use foliate's DOM search; PDFs use extracted text.
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// Comics have no text at all.
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if (this.isFixedLayout && !this.isPDF) return;
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const opening = !this.searchOpen;
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this.closeDrawers();
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this.searchOpen = opening;
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@@ -1477,42 +1486,98 @@ document.addEventListener("alpine:init", () => {
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this.searchProgress = 0;
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this.searchGroups = [];
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try {
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for await (const r of this.view.search({ query: q })) {
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if (gen !== this.searchGen) return;
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if (r === "done") break;
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if (r && typeof r === "object") {
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if (typeof r.progress === "number") {
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this.searchProgress = r.progress;
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continue;
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}
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if (Array.isArray(r.subitems) && r.subitems.length) {
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this.searchGroups.push({
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label: r.label || `Section ${this.searchGroups.length + 1}`,
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items: r.subitems.map((s: any) => ({
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cfi: s.cfi,
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pre: s.excerpt?.pre ?? "",
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match: s.excerpt?.match ?? "",
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post: s.excerpt?.post ?? "",
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})),
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});
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}
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}
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||||
if (this.isFixedLayout && this.isPDF) {
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await this.runPdfSearch(q, gen);
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} else {
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await this.runEpubSearch(q, gen);
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||||
}
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} catch (_e) {
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/* search errors leave partial results */
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}
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if (gen === this.searchGen) this.searching = false;
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},
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async runEpubSearch(q: string, gen: number) {
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for await (const r of this.view.search({ query: q })) {
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if (gen !== this.searchGen) return;
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if (r === "done") break;
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if (r && typeof r === "object") {
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if (typeof r.progress === "number") {
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this.searchProgress = r.progress;
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continue;
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}
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if (Array.isArray(r.subitems) && r.subitems.length) {
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this.searchGroups.push({
|
||||
label: r.label || `Section ${this.searchGroups.length + 1}`,
|
||||
items: r.subitems.map((s: any) => ({
|
||||
cfi: s.cfi,
|
||||
page: null,
|
||||
pre: s.excerpt?.pre ?? "",
|
||||
match: s.excerpt?.match ?? "",
|
||||
post: s.excerpt?.post ?? "",
|
||||
})),
|
||||
});
|
||||
}
|
||||
}
|
||||
}
|
||||
},
|
||||
async runPdfSearch(q: string, gen: number) {
|
||||
const pdf = this.book?.pdf;
|
||||
if (!pdf) return;
|
||||
if (!this.pdfPagesCache) {
|
||||
// Extraction reports progress; it's cached so re-searches are instant.
|
||||
this.pdfPagesCache = await extractPdfPages(pdf, (fraction) => {
|
||||
if (gen === this.searchGen) this.searchProgress = fraction;
|
||||
});
|
||||
}
|
||||
if (gen !== this.searchGen) return;
|
||||
const hits = searchPdfPages(this.pdfPagesCache, q);
|
||||
const byPage = new Map<number, typeof hits>();
|
||||
for (const hit of hits) {
|
||||
const list = byPage.get(hit.page) ?? [];
|
||||
list.push(hit);
|
||||
byPage.set(hit.page, list);
|
||||
}
|
||||
const groups: typeof this.searchGroups = [];
|
||||
let i = 0;
|
||||
for (const [page, list] of byPage) {
|
||||
groups.push({
|
||||
label: `Page ${page + 1}`,
|
||||
items: list.map((hit) => {
|
||||
const key = `pdfsearch:${i++}`;
|
||||
this.pdfSearchKeys.push(key);
|
||||
this.renderer?.addRectAnnotation?.({
|
||||
key,
|
||||
index: page,
|
||||
rects: hit.rects,
|
||||
color: "#ffd54f",
|
||||
});
|
||||
return {
|
||||
cfi: "",
|
||||
page,
|
||||
pre: hit.pre,
|
||||
match: hit.match,
|
||||
post: hit.post,
|
||||
};
|
||||
}),
|
||||
});
|
||||
}
|
||||
this.searchGroups = groups;
|
||||
},
|
||||
clearSearchResults() {
|
||||
this.searchGen++;
|
||||
this.searching = false;
|
||||
this.searchGroups = [];
|
||||
this.searchProgress = 0;
|
||||
for (const key of this.pdfSearchKeys) {
|
||||
this.renderer?.removeRectAnnotation?.(key);
|
||||
}
|
||||
this.pdfSearchKeys = [];
|
||||
this.view?.clearSearch?.();
|
||||
},
|
||||
goToSearchResult(cfi: string) {
|
||||
if (!cfi) return;
|
||||
this.view?.goTo?.(cfi);
|
||||
goToSearchResult(item: { cfi?: string; page?: number | null }) {
|
||||
if (item.cfi) this.view?.goTo?.(item.cfi);
|
||||
else if (item.page != null) this.view?.goTo?.(item.page);
|
||||
else return;
|
||||
this.closeDrawers();
|
||||
},
|
||||
flattenTOC(items: any[], depth = 0): any[] {
|
||||
|
||||
Reference in New Issue
Block a user