Some gradients are represented as patterns in PDF.js, because they
mustn't be affected by the current transform. But in most of the cases,
the gradient is attached to the origin and the current transform is very
basic (dilatation + orthogonal + translation). In those cases, we can
avoid creating the pattern because the gradient is transformed into
another gradient when the inverse transform is applied.
By setting `display: contents` on `.markedContent` containers, they stop
affecting the layout of their children. This means that we can always
position text layer `<span>` elements using percentages relative to the
page dimensions, rather than having two separate code paths.
For some reason this breaks the workaround for text selection flickering
in Chrome/Safari, which can be fixed by setting `user-select: text` on
the `.endOfContent` div (only in Chrome/Safari, as it would break
selection in Firefox).
This commit moves all the logic to scale up&down `<span>`s in the text
layer, introduced in #18283, to CSS.
The motivation for this change is that #18283 is still not enough for
all cases. That PR fixed the problem in Chrome&Firefox desktop, which
allow users to set an actual minimum font size in the browser settings.
However, other browsers (e.g. the Chrome-based WebView on Android) have
more complex logic and they scale up small text rather than simply
applying a minimum.
A workaround for that behavior is probably out of scope for PDF.js
itself as it only affects not officially supported platforms. However,
having access to the actual expected font height (through
`--font-height`) allows embedders of PDF.js to implement a workaround by
themselves.
For now it's just possible to create a single pdf in selecting some pages in different pdf sources.
The merge is for now pretty basic (it's why it's still a WIP) none of these data are merged for now:
- the struct trees
- the page labels
- the outlines
- named destinations
For there are 2 new ref tests where some new pdfs are created: one with some extracted pages and an other
one (encrypted) which is just rewritten.
The ref images are generated from the original pdfs in selecting the page we want and the new images are
taken from the generated pdfs.
Clear the pointer type of CurrentPointers outside of the DrawingEditor to always keep the same, until the user changes the mode.
One of the goal is to keep the same pointer type in case of a refresh of the page or if the user changes the pdf document.
Move current pointer field of DrawingEditor to CurrentPointer class in tools.js: The pointer types fields have been moved to a CurrentPointer object in tools.js. This object is used by eraser.js and ink.js.
Only reset pointer type when user select a new mode: Clear the pointer type when changing mode, instead of at the end of the session. It seems more stable, as the method is not called this way when the user changes pages. Also, clear the pointer type when the mode is changed by an event (the user changes the editor type), otherwise, the same pointer type is kept (the document is changed for example)
We used a SVG string which can be pass to the Path2D ctor but it's a bit slower than
building the path step by step.
Having numerical data instead of a string will help the font data serialization.
The position of the text rendered by `showText` is affected
incrementally by the preceding `showText` operations "on the same line".
For this reason, we keep track of all of them (with their dependencies)
in `sameLineText`.
`sameLineText` can be reset whenever we explicitly position the text
somewhere else. We were previously only doing it for `moveText`, and
this patch updates the code to also do it on `setTextMatrix` (which
resets `this.current.x/y` in `CanvasGraphics` to 0).
The complexity of subsequent `sameLineText` operations dependency
tracking grows quadratically with the number of operations on the same
line, so this patch fixes the performance problem when there are whole
pages of text that only use `setTextMatrix` and not `moveText`.
Follow up on https://github.com/mozilla/pdf.js/pull/20197,
This serializes pattern data into an ArrayBuffer which is
then transferred from the worker to the main thread.
It sets up the stage for us to eventually switch to a
SharedArrayBuffer in the future.
The `width` and `height` arguments for `setDims` have been removed in
PR #20285, but for two calls in the highlight code they remained. This
commit removes them as they are no longer used in the method itself.
Fixes 0722faa9.
