react-pdf
Version:
Display PDFs in your React app as easily as if they were images.
198 lines (197 loc) • 7.98 kB
JavaScript
;
'use client';
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = TextLayer;
const jsx_runtime_1 = require("react/jsx-runtime");
const react_1 = require("react");
const make_cancellable_promise_1 = __importDefault(require("make-cancellable-promise"));
const clsx_1 = __importDefault(require("clsx"));
const tiny_invariant_1 = __importDefault(require("tiny-invariant"));
const warning_1 = __importDefault(require("warning"));
const pdfjs = __importStar(require("pdfjs-dist"));
const usePageContext_js_1 = __importDefault(require("../shared/hooks/usePageContext.js"));
const useResolver_js_1 = __importDefault(require("../shared/hooks/useResolver.js"));
const utils_js_1 = require("../shared/utils.js");
function isTextItem(item) {
return 'str' in item;
}
function TextLayer() {
const pageContext = (0, usePageContext_js_1.default)();
(0, tiny_invariant_1.default)(pageContext, 'Unable to find Page context.');
const { customTextRenderer, onGetTextError, onGetTextSuccess, onRenderTextLayerError, onRenderTextLayerSuccess, page, pageIndex, pageNumber, rotate, scale, } = pageContext;
(0, tiny_invariant_1.default)(page, 'Attempted to load page text content, but no page was specified.');
const [textContentState, textContentDispatch] = (0, useResolver_js_1.default)();
const { value: textContent, error: textContentError } = textContentState;
const layerElement = (0, react_1.useRef)(null);
(0, warning_1.default)(Number.parseInt(window.getComputedStyle(document.body).getPropertyValue('--react-pdf-text-layer'), 10) === 1, 'TextLayer styles not found. Read more: https://github.com/wojtekmaj/react-pdf#support-for-text-layer');
/**
* Called when a page text content is read successfully
*/
function onLoadSuccess() {
if (!textContent) {
// Impossible, but TypeScript doesn't know that
return;
}
if (onGetTextSuccess) {
onGetTextSuccess(textContent);
}
}
/**
* Called when a page text content failed to read successfully
*/
function onLoadError() {
if (!textContentError) {
// Impossible, but TypeScript doesn't know that
return;
}
(0, warning_1.default)(false, textContentError.toString());
if (onGetTextError) {
onGetTextError(textContentError);
}
}
// biome-ignore lint/correctness/useExhaustiveDependencies: useEffect intentionally triggered on page change
(0, react_1.useEffect)(function resetTextContent() {
textContentDispatch({ type: 'RESET' });
}, [page, textContentDispatch]);
(0, react_1.useEffect)(function loadTextContent() {
if (!page) {
return;
}
const cancellable = (0, make_cancellable_promise_1.default)(page.getTextContent());
const runningTask = cancellable;
cancellable.promise
.then((nextTextContent) => {
textContentDispatch({ type: 'RESOLVE', value: nextTextContent });
})
.catch((error) => {
textContentDispatch({ type: 'REJECT', error });
});
return () => (0, utils_js_1.cancelRunningTask)(runningTask);
}, [page, textContentDispatch]);
// biome-ignore lint/correctness/useExhaustiveDependencies: Ommitted callbacks so they are not called every time they change
(0, react_1.useEffect)(() => {
if (textContent === undefined) {
return;
}
if (textContent === false) {
onLoadError();
return;
}
onLoadSuccess();
}, [textContent]);
/**
* Called when a text layer is rendered successfully
*/
const onRenderSuccess = (0, react_1.useCallback)(() => {
if (onRenderTextLayerSuccess) {
onRenderTextLayerSuccess();
}
}, [onRenderTextLayerSuccess]);
/**
* Called when a text layer failed to render successfully
*/
const onRenderError = (0, react_1.useCallback)((error) => {
(0, warning_1.default)(false, error.toString());
if (onRenderTextLayerError) {
onRenderTextLayerError(error);
}
}, [onRenderTextLayerError]);
function onMouseDown() {
const layer = layerElement.current;
if (!layer) {
return;
}
layer.classList.add('selecting');
}
function onMouseUp() {
const layer = layerElement.current;
if (!layer) {
return;
}
layer.classList.remove('selecting');
}
const viewport = (0, react_1.useMemo)(() => page.getViewport({ scale, rotation: rotate }), [page, rotate, scale]);
(0, react_1.useLayoutEffect)(function renderTextLayer() {
if (!page || !textContent) {
return;
}
const { current: layer } = layerElement;
if (!layer) {
return;
}
layer.innerHTML = '';
const textContentSource = page.streamTextContent({ includeMarkedContent: true });
const parameters = {
container: layer,
textContentSource,
viewport,
};
const cancellable = new pdfjs.TextLayer(parameters);
const runningTask = cancellable;
cancellable
.render()
.then(() => {
const end = document.createElement('div');
end.className = 'endOfContent';
layer.append(end);
const layerChildren = layer.querySelectorAll('[role="presentation"]');
if (customTextRenderer) {
let index = 0;
textContent.items.forEach((item, itemIndex) => {
if (!isTextItem(item)) {
return;
}
const child = layerChildren[index];
if (!child) {
return;
}
const content = customTextRenderer(Object.assign({ pageIndex,
pageNumber,
itemIndex }, item));
child.innerHTML = content;
index += item.str && item.hasEOL ? 2 : 1;
});
}
// Intentional immediate callback
onRenderSuccess();
})
.catch(onRenderError);
return () => (0, utils_js_1.cancelRunningTask)(runningTask);
}, [
customTextRenderer,
onRenderError,
onRenderSuccess,
page,
pageIndex,
pageNumber,
textContent,
viewport,
]);
return ((0, jsx_runtime_1.jsx)("div", { className: (0, clsx_1.default)('react-pdf__Page__textContent', 'textLayer'), onMouseUp: onMouseUp, onMouseDown: onMouseDown, ref: layerElement }));
}