feat: Vertical Cell Merging In Table Columns

[eloubens]

Changes

Merge adjacent vertical cells in the columns specified by a new []int field in the Table struct called borderMergeColumns.

Borders in between adjacent vertical cells containing identical data in these columns would be removed, where only the topmost cell's contents would remain with all other cell contents being hidden.

Example

Merge the first and last column

Details

This functionality would only work if both borderColumn and borderRow are set to true. For example, if a user wanted to merge vertical cells in columns 0, 2, 3, when creating the table, the user would need to add table.New().borderColumn(true).borderRow(true).BorderMergeColumns(0,2,3)

All other functionality would remain the same : borderColumn(true).borderRow(true) would just draw all borders, borderColumn(true).borderRow(false) would only draw the column borders... etc

Testing

All unit tests are in lipgloss/table/table_borders_test.go

[meowgorithm]

Hi! Thanks for the contribution. This is an impressive implementation, however we're unlikely to merge it in the short term because of the upcoming v2 release (maintained on the v2-exp branch) and because of the impact on the codebase.