CJKV Information Processing, 2nd Edition

Line-Length Issues

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that are not full-width, and thus nonconformant to grid-like behavior. Applications must

restore the balance by performing minute calculations and adjusting inter-glyph spacing

as appropriate, taking advantage of punctuation marks and the spacing between character

classes. It is an extremely complex subject, far beyond the scope of this book. is book

merely serves as a vehicle to make developers aware of this important issue.

Manipulating Symbol and Punctuation Metrics

As described earlier in this chapter, many symbols and most punctuation marks have

forms that lend themselves to being set with half-width or proportional metrics. One of

the rst methods for adjusting spacing is to apply alternate metrics to one or more sym-

bols or punctuation marks. e preference is usually to apply such metrics to punctuation

marks, then symbols.

Table 7-39 illustrates an example three-line text that requires the use of half-width sym-

bols or punctuation marks due to the application of line breaking.

Adjusting symbol and punctuation metricsTable 7-39.

Glyph string

Before







After







e two ideographic commas in the rst line are converted to half-width forms, which

has the side-eect ...