BorderStyle without sides specified breaks size getters

[alexanderbh]

Describe the bug
If I set a border style with .BorderStyle() (ie, without the "sides")
https://github.com/charmbracelet/lipgloss/blob/v2-exp/set.go#L449

As it says I do not specify sides as with the .Border() setter but all sides will be enabled during render which happens here:
https://github.com/charmbracelet/lipgloss/blob/v2-exp/borders.go#L307

Which is fair. That is a nice default.

My issue then is that none of the sizing methods work. So if I ask horizontal border size it checks if a left or right border has been set. Here is the Left side for example:
https://github.com/charmbracelet/lipgloss/blob/v2-exp/get.go#L314

But this will return 0 in the case where I only used .BorderStyle and borderLeftKey is not set explicitly.

To Reproduce
Pseudocode:

s := lipgloss.NewStyle().BorderStyle(lipgloss.NormalBorder())
s.getHorizontalBorderSize() // This returns 0 but the style will render a border

Expected behavior
Either not setting the "sides" on the border should not show it, but that would be a breaking change.
So the other option is to fix the sizing calculations in the case of "no sides" set but a style is set.

Workaround
Use the .Border instead:

s := lipgloss.NewStyle().Border(lipgloss.NormalBorder(), true, true, true, true)
s.getHorizontalBorderSize() // This returns 2 yay

[maciej-sz]

Check which version you are using. I think this test shows exactly your case, and it is working as expected:

lipgloss/borders_test.go

Lines 54 to 59 in e729228

	{
	name: "BorderStyle(NormalBorder())",
	style: NewStyle().BorderStyle(NormalBorder()),
	wantX: 2,
	wantY: 2,
	},

It's the same on 1.1.0
https://github.com/charmbracelet/lipgloss/blob/v1.1.0/borders_test.go#L54-L59