Several SVG constructs reference other elements based on their ID (e.g.
<use>). This can yield arbitrary reference chains and cycles.
Since all ID-based lookups are funneled through
SkSVGRenderContext::findNodeById(), a straightforward method to break
cycles is to temporarily clear the id->node association following a
lookup -- where "temporarily" refers to the local execution scope.
This approach works for all recursive traversals, as scopes are
nested/released in a natural manner.
- introduce a scoped node reference wrapper (BorrowedNode), which
clears the id mapping for its lifetime and restores it upon
destruction
- update findNodeById() return BorrowedNode values
- update call sites as needed
Change-Id: I2ec5539b24e23b4fbbaff01a44460c41190028e0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/282271
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Tyler Denniston <tdenniston@google.com>
Current strategy: everything from the top
Things to look at first are the manual changes:
- added tools/rewrite_includes.py
- removed -Idirectives from BUILD.gn
- various compile.sh simplifications
- tweak tools/embed_resources.py
- update gn/find_headers.py to write paths from the top
- update gn/gn_to_bp.py SkUserConfig.h layout
so that #include "include/config/SkUserConfig.h" always
gets the header we want.
No-Presubmit: true
Change-Id: I73a4b181654e0e38d229bc456c0d0854bae3363e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209706
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
