import { SearchResult, FindOptions, PdfSearcherOptions } from "./types";
import PdfReportPlugin from "../plugin";
//@ts-ignore
import { PluginModel, SearchFeature } from "@grapecity/viewer-core";
import { IPdfSearcher } from "./IPdfSearcher";
import { IGcTextRect } from "../Models/GcMeasurementTypes";
import { ICustomHighlight } from "../HighlightManager/types";
/**
 * PDF document searcher.
 * Generates asynchronous search results (see search method).
 * The GcPdfSearcher API was designed to be used internally with Search Panel UI.
 **/
export declare class GcPdfSearcher implements IPdfSearcher {
    readonly _plugin: PdfReportPlugin;
    private _cancellation?;
    private _extractTextPromises;
    private _normalizedQuery;
    private _pageContents;
    private _pageContentsEndings;
    _pageTextContents: any[];
    _pageMatches: number[][];
    _pageMatchesLength: number[][];
    private _pageAcroFormResults;
    allResults: SearchResult[];
    private _pagesCount;
    private _pdfDocument;
    private _rawQuery;
    private _state;
    private _totalResultsCount;
    private _totalResultsCountPromise;
    private _firstSearchResult?;
    private _selectedSearchResult?;
    constructor(_plugin: PdfReportPlugin);
    get viewer(): import("..").GcPdfViewer;
    /**
     * Retrieves the content of a specific page.
     * @param {number} pageIndex - The index of the page.
     * @returns {Promise<string>} The content of the specified page.
     */
    fetchPageContent(pageIndex: number): Promise<string>;
    /**
     * Retrieves the text rectangles and styles of a specific page.
     * @param {number} pageIndex - The index of the page.
     * @returns {Promise<{ items: IGcTextRect[], styles: any[] }>} The text rectangles and styles of the specified page.
     */
    fetchPageTextRects(pageIndex: number): Promise<{
        items: IGcTextRect[];
        styles: any[];
    }>;
    /**
     * Retrieves the line endings of the content of a specific page.
     * @param {number} pageIndex - The index of the page.
     * @returns {Promise<{ [x: number]: boolean }>} The line endings of the content of the specified page.
     */
    fetchPageContentLineEndings(pageIndex: number): Promise<{
        [x: number]: boolean;
    }>;
    /**
    * Highlights a specified portion of text on a given page.
    *
    * @param {number} pageIndex - The index of the page where the text is located (0-based).
    * @param {number} startCharIndex - The starting character index (0-based) of the text segment to highlight.
    * @param {number} endCharIndex - The ending character index (0-based) of the text segment to highlight.
    * The character at this index will be excluded from the highlight.
    * @param {Object} [args] - Optional parameters to customize the highlight, such as color, border color, and width.
    * @param {string} [args.color='rgba(255, 255, 0, 0.5)'] - The fill color for the highlight, specified in `rgba`, `hex`, or named color format.
    * Default is a semi-transparent yellow (`rgba(255, 255, 0, 0.5)` or `#FFFF00`) which provides a clear highlight.
    * @param {string} [args.borderColor='rgba(255, 165, 0, 0.75)'] - The color of the highlight border, specified in `rgba`, `hex`, or named color format.
    * Default is a semi-transparent orange (`rgba(255, 165, 0, 0.75)` or `#FFA500`) which provides a contrasting border.
    * @param {number} [args.borderWidth=2] - The width of the highlight border in pixels (default is 2 pixels).
    * @param {Function} [args.paintHandler] - A custom function for handling the painting of the highlight (optional).
    * @param {boolean} [args.clearPrevious=false] - If `true`, removes existing highlights before applying the new one.
    *
    * @returns {Promise<boolean>} A promise that resolves to `true` if the text was successfully highlighted, otherwise `false`.
    *
    * @example
    * ```javascript
    * // Highlight the text from character 10 to character 20 on the first page with custom highlight colors.
    * viewer.highlightTextSegment(0, 10, 20, {
    *     color: 'rgba(173, 216, 230, 0.5)', // semi-transparent light blue
    *     borderColor: 'blue', // named color for the border
    *     borderWidth: 4, // custom border width
    *     clearPrevious: true
    * });
    * ```
    */
    createHighlightFromTextSegment(pageIndex: number, startCharIndex: number, endCharIndex: number, args: {
        color?: string;
        borderColor?: string;
        borderWidth?: number;
        paintHandler?: any;
    }): Promise<ICustomHighlight | null>;
    /**
    * Toggles the visibility of the Search UI.
    * @param {boolean} [forceExpand=true] - Indicates whether to force expanding the Search UI. Default is true.
    * @param {boolean} [replaceMode=false] - Enables the replace mode in the Search UI. Default is false.
    */
    toggle(forceExpand?: boolean, replaceMode?: boolean): void;
    /**
     *
     * @ignore Exclude from docs
     */
    close(): void;
    updateUIState(state: any, previous: any, matchesCount: any): void;
    /**
     * Issues the next search result, primarily used internally by the PDF Searcher.
     *
     * @param result - The search result to be processed.
     * @param cancellation - The cancellation token to handle the possibility of cancellation.
     *
     * @returns A Promise that resolves with the processed search result.
     */
    nextSearchResult(result: SearchResult, cancellation: any): Promise<SearchResult>;
    /**
     * Checks whether a specific search result is currently selected.
     *
     * @param result - The search result to be checked for selection.
     *
     * @returns A boolean indicating whether the provided search result is currently selected.
     */
    isResultSelected(result: SearchResult): boolean;
    /**
     * Retrieves non-empty searcher options.
     *
     * @returns The current state of the PDF searcher options, ensuring that it is a valid object.
     */
    get state(): PdfSearcherOptions;
    /**
     * Gets highlightAll option.
     **/
    get highlightAll(): boolean;
    /**
     * Sets highlightAll option.
     **/
    set highlightAll(checked: boolean);
    /**
     * Internal property.
     * @ignore
     **/
    get findController(): any;
    /**
     * Generates a unique hash ID for the given search result.
     *
     * @param {SearchResult} searchResult - The search result object to generate a hash ID for.
     * @returns {string} A unique hash ID based on the properties of the search result.
     */
    hashSearchResultId(searchResult: SearchResult): string;
    /**
     * Render highlight for the current search result.
     **/
    applyHighlight(): void;
    /**
     * Clear search results.
     * This method must be called when the SearchPanel is closed.
     **/
    resetResults(): void;
    /**
     * Repaint highlight for visible pages.
     **/
    updateAllPages(): void;
    /**
     * Gets selected search result.
     **/
    get selectedSearchResult(): SearchResult | undefined;
    /**
     * Gets selected search result index. Returns -1 if nothing is selected.
     **/
    get selectedSearchResultIndex(): number;
    getSearchResultByIndex(i: number): SearchResult;
    /**
     * Gets total search results count.
     **/
    get totalResultsCount(): number;
    /**
     * Gets total search results count promise.
     **/
    get totalResultsCountPromise(): Promise<number> | null;
    /**
     * Asynchronously generates search results based on the provided search options.
     * @example
     * ```javascript
     *  // Highlight all search results without opening SearchPanel.
     *  const searchIterator = viewer.searcher.search({ Text: "test", MatchCase: true, HighlightAll: true });
     *  searchIterator.next();
     *  searcher.applyHighlight();
     * ```
     * @example
     * ```javascript
     *  // Iterate all search results
     *  const searcher = viewer.searcher;
     *  var searchResults = [];
     *  const searchIterator = searcher.search({ Text: textToSearch, MatchCase: true });
     *  var searchResult = await searchIterator.next();
     *  if (searchResult.value)
     *      searcher.highlight(searchResult.value)
     *  while (searchResult.value && !searchResult.done) {
     *      const searchResultValue = searchResult.value;
     *      searchResults.push(`index: ${searchResultValue.ItemIndex}, text: ${searchResultValue.DisplayText}, pageIndex: ${searchResultValue.PageIndex}`);
     *      searchResult = await searchIterator.next();
     *  }
     *  console.log("Search results: " + (searchResults.length ? searchResults.join("; ") : "No search results"));
     * ```
     * @example
     * ```javascript
     * // Open the document, find the text 'wildlife' and highlight the first result:
     * async function loadPdfViewer(selector) {
     * 	 var viewer = new DsPdfViewer(selector, { restoreViewStateOnLoad: false });
     * 	 viewer.addDefaultPanels();
     * 	 var afterOpenPromise = new Promise((resolve)=>{ viewer.onAfterOpen.register(()=>{ resolve(); }); });
     * 	 await viewer.open('wetlands.pdf');
     * 	 await afterOpenPromise;
     * 	 var findOptions = { Text: 'wildlife' };
     * 	 var searchIterator = await viewer.searcher.search(findOptions);
     * 	 var searchResult = await searchIterator.next();
     *   viewer.searcher.cancel();
     *   viewer.searcher.highlight(searchResult.value);
     * }
     * loadPdfViewer('#root');
     * ```
     * @example
     * // Open the document, find the text 'wildlife' and print search results to the console:
     * ```javascript
     *  async function loadPdfViewer(selector) {
     *      var viewer = new DsPdfViewer(selector);
     *   	viewer.addDefaultPanels();
     *   	await viewer.open('wetlands.pdf');
     *   	await (new Promise((resolve)=>{
     *   		viewer.onAfterOpen.register(()=>{
     *   			resolve();
     *   		});
     *   	}));
     *   	var findOptions = {
     *   		Text: 'wildlife',
     *   		MatchCase: true,
     *   		WholeWord: true,
     *   		StartsWith: false,
     *   		EndsWith: false,
     *   		Wildcards: false,
     *   		Proximity: false,
     *   		SearchBackward: false,
     *   		HighlightAll: true
     *   	};
     *   	var searcher = viewer.searcher;
     *   	var searchIterator = await searcher.search(findOptions);
     *   	var resultsCount = 0;
     *   	var searchResult;
     *   	do {
     *   		searchResult = await searchIterator.next();
     *   		if (searchResult.value) {
     *   			// this could be either result or progress message (ItemIndex < 0)
     *   			if(searchResult.value.ItemIndex >= 0) {
     *   				console.log('next search result:');
     *   				console.log(searchResult.value);
     *   				resultsCount++;
     *   			} else {
     *   				const pageCount = _doc.pageCount.totalPageCount || _doc.pageCount.renderedSoFar;
     *   				console.log('search progress, page index is ' + searchResult.value.PageIndex);
     *   			}
     *   		}
     *   		else {
     *   			console.log("Search completed");
     *   			break;
     *   		}
     *   	}
     *   	while(!searchResult.done);
     *   	console.log('Total results count is ' + resultsCount);
     *  }
     * ```
     * @param options - Search options to customize the search.
     * @returns An asynchronous iterable iterator that yields search results.
     */
//@ts-ignore
    search(options: FindOptions): AsyncIterableIterator<SearchResult>;
    /**
     * Navigates to a page containing the result and highlights found text.
     * @param searchResult
     * @example
     * ```javascript
     * // Open the document, find the text 'wildlife' and highlight the first result:
     * async function loadPdfViewer(selector) {
     * 	 var viewer = new GcPdfViewer(selector, { restoreViewStateOnLoad: false });
     * 	 viewer.addDefaultPanels();
     * 	 var afterOpenPromise = new Promise((resolve)=>{ viewer.onAfterOpen.register(()=>{ resolve(); }); });
     * 	 await viewer.open('wetlands.pdf');
     * 	 await afterOpenPromise;
     * 	 var findOptions = { Text: 'wildlife' };
     * 	 var searchIterator = await viewer.searcher.search(findOptions);
     * 	 var searchResult = await searchIterator.next();
     *   viewer.searcher.cancel();
     *   viewer.searcher.highlight(searchResult.value);
     * }
     * loadPdfViewer('#root');
     * ```
     **/
    highlight(searchResult: SearchFeature.SearchResult | null, pageIndex?: number): Promise<void>;
    /**
     * Cancel search task.
     * @example
     * ```javascript
     * // Open the document, find the text 'wildlife' and highlight the first result:
     * async function loadPdfViewer(selector) {
     * 	 var viewer = new GcPdfViewer(selector, { restoreViewStateOnLoad: false });
     * 	 viewer.addDefaultPanels();
     * 	 var afterOpenPromise = new Promise((resolve)=>{ viewer.onAfterOpen.register(()=>{ resolve(); }); });
     * 	 await viewer.open('wetlands.pdf');
     * 	 await afterOpenPromise;
     * 	 var findOptions = { Text: 'wildlife' };
     * 	 var searchIterator = await viewer.searcher.search(findOptions);
     * 	 var searchResult = await searchIterator.next();
     *   viewer.searcher.cancel();
     *   viewer.searcher.highlight(searchResult.value);
     * }
     * loadPdfViewer('#root');
     * ```
     **/
    cancel(): void;
    _initialize(): void;
    /**
    * @return {string} The (current) normalized search query.
    */
    get _query(): string;
    /**
     * Extract all text from pdf document once.
     * */
    _extractText(): void;
    _reset(): void;
    /**
     * Helper for multi-term search that fills the `matchesWithLength` array
     * and handles cases where one search term includes another search term (for
     * example, "tamed tame" or "this is"). It looks for intersecting terms in
     * the `matches` and keeps elements with a longer match length.
     */
    _prepareMatches(matchesWithLength: any, matches: any, matchesLength: any): void;
    /**
     * Determine if the search query constitutes a "whole word", by comparing the
     * first/last character type with the preceding/following character type.
     */
    _isEntireWord(content: any, lineEndings: {
        [x: number]: boolean;
    }, startIdx: any, length: any): boolean;
    _isStartsWith(content: any, lineEndings: {
        [x: number]: boolean;
    }, startIdx: any, _length: any): boolean;
    _isEndsWith(content: any, lineEndings: {
        [x: number]: boolean;
    }, startIdx: any, length: any): boolean;
    _findPhraseMathIndex(pageContent: string, query: string, startIndex: number, lineEndings: {
        [x: number]: boolean;
    }): {
        matchIdx: number;
        queryLen: number;
    } | null;
    /**
     * Calculates the phrase matches in the given page content based on the specified query and matching options.
     * @param {string} query - The query string to search for.
     * @param {Object.<number, boolean>} pageContentsEndings - An object representing the line endings on the page, where keys are character indices and values indicate line endings.
     * @param {string} pageContent - The content of the page.
     * @param {boolean} entireWord - Whether to match the entire word only.
     * @param {boolean} startsWith - Whether the query should match phrases that start with the query string.
     * @param {boolean} endsWith - Whether the query should match phrases that end with the query string.
     * @param {boolean} wildcards - Whether the query allows wildcards for matching.
     * @returns {Object} An object containing the matches and their lengths.
     * @returns {number[]} matches - An array of character indices (character indices) on the page where matches were found.
     * @returns {number[]} matchesLength - An array of lengths for each matched text.
     */
    _calculatePhraseMatch(query: string, pageContentsEndings: {
        [x: number]: boolean;
    }, pageContent: string, entireWord: boolean, startsWith: boolean, endsWith: boolean, wildcards: boolean): {
        matches: number[];
        matchesLength: number[];
    };
    findLineEndIndex(startIndex: number, pageContent: string, lineEndings: {
        [x: number]: boolean;
    }): number;
    _calculateWordMatch(query: string, pageContentsEndings: {
        [x: number]: boolean;
    }, pageContent: any, entireWord: any, startsWith: any, endsWith: any, wildcards: any): {
        matches: number[];
        matchesLength: number[];
    };
    _calculateMatch(pageContent: string, pageContentsEndings: {
        [x: number]: boolean;
    }): {
        matches: number[];
        matchesLength: number[];
    };
    private handleProximitySearch;
    /**
    * Validates proximity conditions based on the number of words between matches.
    *
    * @param uniqueMatches - Array of unique matches containing matchIndex, matchLength, and wordsBetweenCount.
    * @param proximityCounts - Array of proximity counts specifying the maximum allowed distance between words.
    * @returns {boolean} - Returns true if all proximity conditions are satisfied, otherwise false.
    */
    private validateProximityConditions;
    private collectMatchesForOrder;
    /**
     * Extracts a substring from `pageContent` between `startInd` and `endInd`, and optionally fills line endings with spaces
     * based on `pageContentsEndings` mapping.
     *
     * @param {number} startInd - The start index of the substring in `pageContent`.
     * @param {number} endInd - The end index of the substring in `pageContent`.
     * @param {string} pageContent - The full content of the page from which the substring is extracted.
     * @param {{ [x: number]: boolean }} pageContentsEndings - A mapping indicating where line endings occur.
     * @param {boolean} [fillLineEndingsWithSpaces=true] - Whether to fill line endings with spaces if they don't already exist.
     *
     * @returns {string} The substring with optional spaces inserted at line breaks.
     */
    getContentSnippet(startInd: number, endInd: number, pageContent: string, pageContentsEndings: {
        [x: number]: boolean;
    }, fillLineEndingsWithSpaces?: boolean): string;
    _countWordsBetweenTerms(startInd: number, endInd: number, pageContent: string, pageContentsEndings: {
        [x: number]: boolean;
    }): number;
    /**
     * Deduplicates matches based on matchIndex, storing matchLength and wordsBetweenCount.
     *
     * @param matches - Array of matches containing matchIndex, matchLength, and wordsBetweenCount.
     * @returns {Array} - Returns an array of unique matches with matchIndex, matchLength, and wordsBetweenCount.
     */
    private deduplicateMatches;
    /**
     * Checks all words in proximity search are found.
     * Example:
     * Text: Note that some annotation types may not display in certain viewers
     * Search should be successful: annotation around(1) may around(2) in
     * Search should fail: annotation around(1) may around(1) in
     * @ignore
     * @param queryArray
     * @param matchIndicesToKeep
     * @param pageContent
     */
    _proximityCheckAllWordsInResults(queryArray: RegExpMatchArray, matchIndicesToKeep: {
        matchIndex: number;
        matchLength: number;
    }[], pageContent: string): boolean;
    _findMathIndexByQuery(pageContent: string, mathes: number[], mathesLength: number[], subquery: string, startIndex: number): {
        mathIndex: number;
        mathLength: number;
    };
    /**
     * @ignore Exclude from documentation. Base interface implementation.
     * @param page
     * @param results
     * @returns
     */
    renderHighlightPage(page: PluginModel.IPageData, results: SearchFeature.SearchResult[]): PluginModel.PageView;
}