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@@ -1229,7 +1229,7 @@ var PDFFindController = (function PDFFindControllerClosure() {
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// If the page is selected, scroll the page into view, which triggers
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// rendering the page, which adds the textLayer. Once the textLayer is
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// build, it will scroll onto the selected match.
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- this.pdfViewer.scrollPageIntoView(index + 1);
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+ this.pdfViewer.currentPageNumber = index + 1;
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}
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var page = this.pdfViewer.getPageView(index);
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@@ -1924,7 +1924,10 @@ var PDFLinkService = (function PDFLinkServiceClosure() {
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'Trying to navigate to a non-existent page.');
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return;
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}
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- self.pdfViewer.scrollPageIntoView(pageNumber, dest);
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+ self.pdfViewer.scrollPageIntoView({
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+ pageNumber: pageNumber,
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+ destArray: dest,
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+ });
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if (self.pdfHistory) {
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// Update the browsing history.
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@@ -2050,7 +2053,11 @@ var PDFLinkService = (function PDFLinkServiceClosure() {
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}
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}
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if (dest) {
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- this.pdfViewer.scrollPageIntoView(pageNumber || this.page, dest);
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+ this.pdfViewer.scrollPageIntoView({
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+ pageNumber: pageNumber || this.page,
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+ destArray: dest,
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+ allowNegativeOffset: true,
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+ });
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} else if (pageNumber) {
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this.page = pageNumber; // simple page
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}
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@@ -3724,7 +3731,11 @@ var PDFViewer = (function pdfViewer() {
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dest = [null, { name: 'XYZ' }, this._location.left,
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this._location.top, null];
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}
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- this.scrollPageIntoView(page, dest);
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+ this.scrollPageIntoView({
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+ pageNumber: page,
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+ destArray: dest,
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+ allowNegativeOffset: true,
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+ });
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}
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this._setScaleDispatchEvent(newScale, newValue, preset);
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@@ -3796,17 +3807,37 @@ var PDFViewer = (function pdfViewer() {
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scrollIntoView(pageView.div);
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},
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+ /**
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+ * @typedef ScrollPageIntoViewParameters
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+ * @param {number} pageNumber - The page number.
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+ * @param {Array} destArray - (optional) The original PDF destination array,
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+ * in the format: <page-ref> </XYZ|/FitXXX> <args..>
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+ * @param {boolean} allowNegativeOffset - (optional) Allow negative page
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+ * offsets. The default value is `false`.
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+ */
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+
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/**
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* Scrolls page into view.
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- * @param {number} pageNumber
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- * @param {Array} dest - (optional) original PDF destination array:
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- * <page-ref> </XYZ|FitXXX> <args..>
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+ * @param {ScrollPageIntoViewParameters} params
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*/
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- scrollPageIntoView: function PDFViewer_scrollPageIntoView(pageNumber,
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- dest) {
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+ scrollPageIntoView: function PDFViewer_scrollPageIntoView(params) {
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if (!this.pdfDocument) {
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return;
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}
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+ if (arguments.length > 1 || typeof params === 'number') {
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+ console.warn('Call of scrollPageIntoView() with obsolete signature.');
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+ var paramObj = {};
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+ if (typeof params === 'number') {
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+ paramObj.pageNumber = params; // pageNumber argument was found.
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+ }
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+ if (arguments[1] instanceof Array) {
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+ paramObj.destArray = arguments[1]; // destArray argument was found.
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+ }
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+ params = paramObj;
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+ }
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+ var pageNumber = params.pageNumber || 0;
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+ var dest = params.destArray || null;
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+ var allowNegativeOffset = params.allowNegativeOffset || false;
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if (this.isInPresentationMode || !dest) {
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this._setCurrentPageNumber(pageNumber, /* resetCurrentPageView */ true);
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@@ -3814,6 +3845,11 @@ var PDFViewer = (function pdfViewer() {
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}
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var pageView = this._pages[pageNumber - 1];
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+ if (!pageView) {
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+ console.error('PDFViewer_scrollPageIntoView: ' +
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+ 'Invalid "pageNumber" parameter.');
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+ return;
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+ }
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var x = 0, y = 0;
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var width = 0, height = 0, widthScale, heightScale;
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var changeOrientation = (pageView.rotation % 180 === 0 ? false : true);
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@@ -3894,6 +3930,13 @@ var PDFViewer = (function pdfViewer() {
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var left = Math.min(boundingRect[0][0], boundingRect[1][0]);
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var top = Math.min(boundingRect[0][1], boundingRect[1][1]);
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+ if (!allowNegativeOffset) {
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+ // Some bad PDF generators will create destinations with e.g. top values
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+ // that exceeds the page height. Ensure that offsets are not negative,
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+ // to prevent a previous page from becoming visible (fixes bug 874482).
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+ left = Math.max(left, 0);
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+ top = Math.max(top, 0);
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+ }
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scrollIntoView(pageView.div, { left: left, top: top });
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},
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