Table of Contents Links

[adrg]

This PR adds link annotation support for the TOC component.
Links are created automatically for the Chapter and Subchapter components.

Resolves #264

[codecov]

Codecov Report

Merging #314 into v3 will increase coverage by 0.1%.
The diff coverage is 86.84%.

@@           Coverage Diff            @@
##               v3    #314     +/-   ##
========================================
+ Coverage   38.49%   38.6%   +0.1%     
========================================
  Files         120     120             
  Lines       22886   22941     +55     
========================================
+ Hits         8811    8856     +45     
- Misses      12800   12806      +6     
- Partials     1275    1279      +4

Impacted Files	Coverage Δ
pdf/creator/subchapter.go	68.67% <100%> (+2%)	⬆️
pdf/creator/chapters.go	61.72% <100%> (+2.51%)	⬆️
pdf/creator/toc_line.go	73.8% <100%> (+3.8%)	⬆️
pdf/creator/styled_paragraph.go	86.18% <100%> (+0.1%)	⬆️
pdf/creator/creator.go	67.85% <100%> (+0.31%)	⬆️
pdf/creator/toc.go	85.32% <42.85%> (-2.92%)	⬇️
pdf/creator/block.go	67.61% <50%> (-0.57%)	⬇️
pdf/creator/text_chunk.go	89.47% <77.77%> (-3.63%)	⬇️

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[gunnsth-review]

Reviewed 9 of 9 files at r1.
Reviewable status: complete! all files reviewed, all discussions resolved