Ensure that all necessary /Font resources are included when saving a WidgetAnnotation-instance (issue 12294)
#12361
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/botio test |
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/botio-linux preview |
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The functionality here not only works for saving, but also for printing, so could you add a reference test for the document from the issue so this code is covered by tests? (Bonus points if it can be reduced, but if that's difficult a linked test case will definitely suffice.) Moreover, I entered "test2" in the "Full name" field of the document from the issue and printed it to a file. The result is here: Is this expected? If I copy/paste some of the characters from the PDF file itself, I get: I do notice that some fonts are not embedded in the file, so maybe that explains the garbled characters here. Since I'm not familiar with this language, I'm not really sure how to check the correctness here. Do you have any suggestions? |
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@timvandermeij, I tested this patch on top of #12292 and it works well (print & save). |
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Alright, that's good to know. I think it would still be good to add a reference test in this PR to test the added logic, and it will give us confirmation that the other patch also works as expected since that should improve the reference test added here. |
Snuffleupagus
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While that'd have been technically possible, it would have meant a whole lot of hand-editing of PDF data to make it work. All-in-all, it really didn't seem worth the time/effort; hence a regular linked test-case is included here. Furthermore, I'm not completely sure if the |
…`WidgetAnnotation`-instance (issue 12294) This patch contains a possible approach for fixing issue 12294, which compared to other PRs is purposely limited to the affected `WidgetAnnotation` code. As mentioned elsewhere, considering that we're (at least for now) trying to fix *one specific* case, I think that we should avoid modifying the `Dict` primitive[1] and/or avoid a solution that (indirectly) modifies an existing `Dict`-instance[2]. This patch simply fixes the issue at hand, since that seems easiest for now, and I'd suggest that we worry about a more general approach if/when that actually becomes necessary. Hence the solution implemented here, for `WidgetAnnotation`, is to simply use a combination of the local *and* AcroForm /DR resources during OperatorList-parsing to ensure that things work correctly regardless of where a particular /Font resource is found. For saving of form-data, on the other hand, we want to avoid increasing the file-size unnecessarily and need to be smarter than just merging all of the available resources. To achive this, a new `WidgetAnnotation._getSaveFieldResources` method will when necessary produce a combined resources `Dict` with only the minimum amount of data from the AcroForm /DR resources included. --- [1] You want to avoid anything that could cause the general `Dict` implementation to become slower, or more complex, just for handling an edge-case in my opinion. [2] If an existing `Dict`-instance is modified unexpectedly, that could very easily lead to problems elsewhere since e.g. `Dict`-instances created during parsing are not expected to be changed.
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/botio test |
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From: Bot.io (Windows)FailedFull output at http://54.215.176.217:8877/b3b3ae0fa9ec7a4/output.txt Total script time: 29.91 mins
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Nice work! /botio makeref |
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From: Bot.io (Windows)SuccessFull output at http://54.215.176.217:8877/aa9a551266c0547/output.txt Total script time: 28.01 mins
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This patch contains a possible approach for fixing issue #12294, which compared to other PRs is purposely limited to the affected
WidgetAnnotationcode.As mentioned elsewhere, considering that we're (at least for now) trying to fix one specific case, I think that we should avoid modifying the
Dictprimitive[1] and/or avoid a solution that (indirectly) modifies an existingDict-instance[2].This patch simply fixes the issue at hand, since that seems easiest for now, and I'd suggest that we worry about a more general approach if/when that actually becomes necessary.
Hence the solution implemented here, for
WidgetAnnotation, is to simply use a combination of the local and AcroForm /DR resources during OperatorList-parsing to ensure that things work correctly regardless of where a particular /Font resource is found.For saving of form-data, on the other hand, we want to avoid increasing the file-size unnecessarily and need to be smarter than just merging all of the available resources. To achive this, a new
WidgetAnnotation._getSaveFieldResourcesmethod will when necessary produce a combined resourcesDictwith only the minimum amount of data from the AcroForm /DR resources included.[1] You want to avoid anything that could cause the general
Dictimplementation to become slower, or more complex, just for handling an edge-case in my opinion.[2] If an existing
Dict-instance is modified unexpectedly, that could very easily lead to problems elsewhere since e.g.Dict-instances created during parsing are not expected to be changed.