Adapt Makie's line wrapping

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Fixes #10

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Line wrapping is not perfect

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Still not perfect ...

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I think Makie's line wrapping neglects newline characters when determining widths.

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Makie's line wrapping does not consider wrapping at newline characters. The overflow above appears because the actual width is computed with respect to the last wrapped whitespace and not the trailing newline character.

This patch fixes this:

diff --git a/src/layouting/layouting.jl b/src/layouting/layouting.jl
index 069289099..edde59807 100644
--- a/src/layouting/layouting.jl
+++ b/src/layouting/layouting.jl
@@ -114,7 +114,8 @@ function glyph_collection(
             push!(xs[end], x)
             x += charinfos[i].hadvance

-            if 0 < word_wrap_width < x && (ci.char == ' ' || i == length(charinfos)) && 
+            if 0 < word_wrap_width < x &&
+                    ((ci.char == ' ' || ci.char == '\n') || i == length(charinfos)) &&
                     last_space_local_idx != 0

                 newline_offset = xs[end][last_space_local_idx + 1]
@@ -135,6 +136,14 @@ function glyph_collection(
                     push!(lineinfos, view(charinfos, last_line_start:i))
                 end

+                if ci.char == '\n'
+                    push!(xs, Float32[])
+                    push!(lineinfos, view(charinfos, last_line_start:i))
+                    last_space_local_idx = 0
+                    last_line_start = i+1
+                    x = 0f0
+                end
+
             elseif ci.char == '\n' || i == length(charinfos)
                 push!(xs, Float32[])
                 push!(lineinfos, view(charinfos, last_line_start:i))

Line wrapping is now (almost) perfect. Almost, because the trailing whitespaces/newlines carry widths and thus the right edge of the box does not exactly align with the last character. This can be better seen when wrapping on the newline char, because interestingly newline chars are wider than whitespaces.

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Line wrapping works now nicely with Makie@v0.17.4.