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Ensure that we don't reset the current page view if the user inputs an invalid page number (PR 7289 follow-up)

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After PR 7289, we'll now reset the current page view in cases where I don't think we should. To avoid this, this patch ensures that we'll not modify the position when the page number is out-of-bounds.

**STR:**
1. Open http://mozilla.github.io/pdf.js/web/viewer.html#page=1&zoom=auto,-98,696
2. Enter an invalid number, e.g. `1000`, in the `pageNumber` input.

**ER:**
The current position in the document shouldn't change, since the page number wasn't valid.

**AR:**
The document resets to the top of the page `1`.
This commit is contained in:
Jonas Jenwald 2016-07-14 12:04:16 +02:00
parent 1695893526
commit 9f34700e0d
1 changed files with 21 additions and 5 deletions
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26
web/pdf_viewer.js
View File

@ -155,22 +155,34 @@ var PDFViewer = (function pdfViewer() {
return this._pages[index];
},
/**
* @returns {number}
*/
get currentPageNumber() {
return this._currentPageNumber;
},
/**
* @param {number} val - The page number.
*/
set currentPageNumber(val) {
if (!this.pdfDocument) {
this._currentPageNumber = val;
return;
}
this._setCurrentPageNumber(val);
// The intent can be to just reset a scroll position and/or scale.
this._resetCurrentPageView();
this._setCurrentPageNumber(val, /* resetCurrentPageView = */ true);
},
_setCurrentPageNumber: function pdfViewer_setCurrentPageNumber(val) {
/**
* @private
*/
_setCurrentPageNumber:
function pdfViewer_setCurrentPageNumber(val, resetCurrentPageView) {
if (this._currentPageNumber === val) {
if (resetCurrentPageView) {
this._resetCurrentPageView();
}
return;
}
var arg;
@ -193,6 +205,10 @@ var PDFViewer = (function pdfViewer() {
this._currentPageNumber = val;
this.eventBus.dispatch('pagechanging', arg);
this.eventBus.dispatch('pagechange', arg);
if (resetCurrentPageView) {
this._resetCurrentPageView();
}
},
/**
@ -500,6 +516,7 @@ var PDFViewer = (function pdfViewer() {
/**
* Refreshes page view: scrolls to the current page and updates the scale.
* @private
*/
_resetCurrentPageView: function () {
if (this.isInPresentationMode) {
@ -524,8 +541,7 @@ var PDFViewer = (function pdfViewer() {
}
if (this.isInPresentationMode || !dest) {
this._setCurrentPageNumber(pageNumber);
this._resetCurrentPageView();
this._setCurrentPageNumber(pageNumber, /* resetCurrentPageView */ true);
return;
}