With the changes in PR 16153 we're no longer setting a `<base href>` in the Firefox PDF Viewer, hence it shouldn't be necessary to keep setting a `baseUrl` in the `PDFLinkService`-class.
Given that the original document URL is now kept, the browser itself will handle relative URLs and we can thus slightly reduce the amount of string parsing required when handling various links in the viewer.
Currently if you e.g. enable the `useOnlyCssZoom` option rendering may no longer finish as intended. To reproduce:
- Enable the `useOnlyCssZoom` option.
- Load https://github.com/mozilla/pdf.js/files/1522715/wuppertal_2012.pdf (in the development viewer).
- When rendering starts, *immediately* change the zoom-level.
In this case the document will never finish rendering, since the `postponeDrawing`-functionality will (here incorrectly) abort rendering and with CSS-only zooming rendering is only expected to happen once per page.
To fix this we'll simply ignore any `drawingDelay` when CSS-only zooming is used (regardless if it's triggered via the option or the zoom-level being very large).
Currently the `zoomLayer` isn't rotated correctly in all cases. To reproduce:
- Load https://github.com/mozilla/pdf.js/files/1522715/wuppertal_2012.pdf
- Let the document render.
- Rotate the document *four* times, such that the original rotation is restored.
The easiest solution, as far as I can tell, is that we always set the `transform` just as we did (for years) prior to the changes in PR 15812.
- Reduce a little bit of duplication by enforcing the max/min scale-values once, at the end, in the `increaseScale`/`decreaseScale` methods.
- Convert the "private" `PDFViewer` scale-related methods into actually private ones, now that JavaScript supports that.
Given that the viewer always set the `dir`-attribute, to either LTR or RTL, we should be able to use this logical CSS property to (very slightly) reduce the size of the CSS; please see https://developer.mozilla.org/en-US/docs/Web/CSS/inset-block
The signatures of these methods were changed in PR 15886, which has now been included in a couple of releases, hence it should hopefully be OK to remove the fallback code-paths now.
Also, the methods are updated slightly to be explicit about what options are supported and we'll no longer pass along any arbitrary options to the "private" methods.
Some of these pre-processor statements are *many* years old, and could thus do with some clean-up. Note that the pre-processor originally didn't support else-if statements, and by using those the code becomes a bit less verbose.
The idea is to apply an overall filter on each page: the main advantage
is to have some filtered images which could help to make them visible for
some users.
The tag <base> is used to resolve relative URIs within the document.
Newly added SVG filters use a relative URI which then use the URI in base
but this one mismatches with the document URI and consequently filters are
not found in the Firefox viewer.
So this patch just removes <base> and replace few relative URLs by absolute
ones.
In order to help to identify a link, we add a border around it with the LinkText color.
And backdrop colors are inverted when the mouse pointer hovers them, this way it should
help to identify the link where the pointer is.
Given that the debugging hash-parameters will only be used when the `pdfBugEnabled` option is manually set[1], we can skip a *tiny* bit of asynchronicity for "regular" users.
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[1] Note that it's enabled by default in the development viewer, i.e. in `gulp server` mode.
