Apple Newton Utilities User's Guide download pdf (Page 317)

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CHAPTER 8

Text and Ink Input and Display

Using Text 8-25

Text and Styles 8

Within a paragraph view, text is represented in two slots: the 'text slot and the

'styles slot. The 'text slot contains the sequence of text characters in the

paragraph, including an instance of the

kParaInkChar placeholder character

(

0xF701) for each ink word.

The

'styles slot speciﬁes how each text run is displayed in the paragraph. A

text run is a sequence of characters that are all displayed with the same font

speciﬁcation. The

'styles slot consists of an array of alternating length and style

information: one length value and one style speciﬁcation for each text run. For ink

words, the length value is always

1, and the style speciﬁcation is a binary object

that contains the ink data.

For example, consider the paragraph text shown in Figure 8-5.

Figure 8-5 A paragraph view containing an ink word and text

In the paragraph view shown in Figure 8-5, the 'text slot contains the following

sequence of Unicode characters:

'T' 'r' 'y' ' ' 0xF701 'o' 'n' 'e'

The 'styles slot for this paragraph consists of the following array:

styles: [4, 12289, 1, <inkData, length 42>, 4, 12289]

The ﬁrst pair of values in the array, (4, 12289), covers the word “Try” and the

space that follows it. The length value,

4, speciﬁes that the text run consists of four

characters. The packed integer font speciﬁcation value

12289 speciﬁes plain,

12-point, New York.

The second pair of values in the array, (

1, inkData), covers the ink word. The

length value is

1, which is always the case for ink words. The value inkData is a

binary object that contains the compressed data for the handwritten “this” that is

part of the text in the paragraph view. The data is automatically extracted from the

tablet data as part of a preliminary recognition process that precedes word recognition.

The third and ﬁnal pair of values in the 'styles slot array, (4, 12289), covers

the word “one” and the space that precedes it. This text run is 4 characters long and

is displayed 12 points high in the plain version of the New York font family.

Note

The packed integer font speciﬁcation values

are shown in Table 8-6 (page 8-21).

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