Simplify and fix Table.set_span
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In `Table.set_span` there are a bunch of redundant checks for borders and number of bordered edges that this commit simplifies. Additionally the vertical and horizontal spans are independent of each other, therefore these checks can be untangled. I think that this actually uncovered a bug in the old implementation. For the cases where both horizontally and vertically only one of both edges are bordered there are differences with this commit. | left | right | top | bottom | vspan/hspan before | vspan/hspan after | | ----- | ----- | --- | ------ | ------------------ | ----------------- | | true | false | true | false | false | true | | true | false | false | true | false | true | | false | true | true | false | false | true | | false | true | false | true | false | true | This change in behaviour of the `Table.set_span` method is a bug fix. I guess in the original code it was missed that a cell could both horizontally and vertically span to other cells if the two bordered edges are not on the same direction.
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This is now locally tested and does pass. But I didn't check whether the tests would catch the different hspan/vspan results. I probably should add tests for that.. |
The attributes `vspan` and `hspan` depend only on other attributes inside `Cell`, therefore there is no need to use a mutating method `set_span` to recover the invariants of `Cell`.
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After the change to use properties for |
The condition `hspan and not left` expands to `(not left or not right) and not left` which simplifies to `not left`. After this change `Cell.hspan` and `Cell.vspan` aren't used anymore in this codebase. They stay because they are part of the API.
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In
Table.set_spanthere are a bunch of redundant checks for borders and number of bordered edges that this commit simplifies. Additionally the vertical and horizontal spans are independent of each other, therefore these checks can be untangled.I think that this actually uncovered a bug in the old implementation. For the cases where both horizontally and vertically only one of both edges are bordered there are differences with this commit.
This change in behaviour of the
Table.set_spanmethod is a bug fix. I guess in the original code it was missed that a cell could both horizontally and vertically span to other cells if the two bordered edges are not on the same direction.