Richtext - r3n/rebol-wiki GitHub Wiki

Table of Contents

Turning Text Styles On & Off

Turn On Bold, Italic, Underline & Color Styles 

bold "This text is bold"
italic "This text is italic"
underline "This text is underlined"
255.0.0 "This text is red"

Turn Off Or Drop Styles

Off turns off one text style. 

bold "This text is bold" bold off "This text is normal"

More text styles can be removed with Drop and an integer argument. 

bold "This text is bold" italic " and italic." drop 2 "This text is normal"

Without the integer argument, only one style is dropped.

Setting Fonts & Font Attributes

1. prepare font in Rebol: 

fixed-font: make system/standard/font [name: "Courier new"]

2. now you can use that font in rich-text dialect 

font fixed-font "This text is in Courier New"

This is standard font object in system/standard/font: 

SYSTEM/STANDARD/FONT is an object of value:

name            string!   "arial"
style           none!     none
size            integer!  12
color           tuple!    0.0.0
offset          pair!     2x2
space           pair!     0x0
align           word!     center
valign          word!     center
shadow          none!     none

Note, that you don't have to create new font if you want to just change size or color of the text: 

view [
    text [
        red
        "this is default size red text^/"
        size 20
        blue
        "and this is blue big text"
    ]
]

Setting Paragraph Attributes

Usage of paragraphs is similar to fonts.

1. prepare para in Rebol: 

nowrap-para: make system/standard/para [wrap?: no]

2. use it in rich-text: 

para nowrap-para "This text won't wrap"

It seems that para supports 'wrap? only, setting 'origin, 'margin, 'indent or 'scroll seems to have no effect.

Setting Text Position

You can set position of text using 'scroll command 

scroll 0x50

(NOTE: This position is a pixel offset - not a text character offset)

IMPORTANT: The 'scroll command must be before the first line of actual text in the rich-text dialect block.

For example the following is valid: 

para my-para
font big-font
scroll 50x50
"Hello World" newline
"Welcome to RichText"

This is invalid (and scroll will be ignored): 

para my-para
font big-font
"Hello World" newline
scroll 50x50
"Welcome to RichText"

Notes

'newline keyword is also supported.

'anti-alias may also be used to specify aliasing of text. 

scroll 50x20
font big-font
anti-alias
"Hello World"

'anti-alias may be placed anywhere within the block and affects the entire block.

Note: When setting a new font the current pen is reset to black.

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