W3C CSS2 Cascading Style Sheets, level 2 - instructional media + ...

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’top’ Value: | | auto | inherit Initial: auto Applies to: positioned elements Inherited: no Percentages: refer to height of containing block Media: visual This property specifies how far a box’s top content edge is offset below the top edge of the box’s containing block [p. 96] . ’right’ Value: | | auto | inherit Initial: auto Applies to: positioned elements Inherited: no Percentages: refer to width of containing block Media: visual This property specifies how far a box’s right content edge is offset to the left of the right edge of the box’s containing block [p. 96] . ’bottom’ Value: | | auto | inherit Initial: auto Applies to: positioned elements Inherited: no Percentages: refer to height of containing block Media: visual This property specifies how far a box’s bottom content edge is offset above the bottom of the box’s containing block [p. 96] . ’left’ Value: | | auto | inherit Initial: auto Applies to: positioned elements Inherited: no Percentages: refer to width of containing block Media: visual This property specifies how far a box’s left content edge is offset to the right of the left edge of the box’s containing block [p. 96] . The values for the four properties have the following meanings: 104
The offset is a fixed distance from the reference edge. The offset is a percentage of the containing block’s width (for ’left’ or ’right’) or height (for ’top’ and ’bottom’). For ’top’ and ’bottom’, if the height of the containing block is not specified explicitly (i.e., it depends on content height), the percentage value is interpreted like ’auto’. auto The effect of this value depends on which of related properties have the value ’auto’ as well. See the sections on the width [p. 135] and height [p. 139] of absolutely positioned [p. 113] , non-replaced elements for details. For absolutely positioned [p. 113] boxes, the offsets are with respect to the box’s containing block [p. 96] . For relatively positioned boxes, the offsets are with respect to the outer edges of the box itself (i.e., the box is given a position in the normal flow, then offset from that position according to these properties). 9.4 Normal flow Boxes in the normal flow belong to a formatting context, which may be block or inline, but not both simultaneously. Block [p. 97] boxes participate in a block formatting [p. 105] context. Inline boxes [p. 98] participate in an inline formatting [p. 105] context. 9.4.1 Block formatting context In a block formatting context, boxes are laid out one after the other, vertically, beginning at the top of a containing block. The vertical distance between two sibling boxes is determined by the ’margin’ properties. Vertical margins between adjacent block boxes in a block formatting context collapse [p. 86] . In a block formatting context, each box’s left outer edge touches the left edge of the containing block (for right-to-left formatting, right edges touch). This is true even in the presence of floats (although a box’s content area may shrink due to the floats). For information about page breaks in paged <strong>media</strong>, please consult the section on allowed page breaks [p. 183] . 9.4.2 Inline formatting context In an inline formatting context, boxes are laid out horizontally, one after the other, beginning at the top of a containing block. Horizontal margins, borders, and padding are respected between these boxes. The boxes may be aligned vertically in different ways: their bottoms or tops may be aligned, or the baselines of text within them may be aligned. The rectangular area that contains the boxes that form a line is called a line box. The width of a line box is determined by a containing block [p. 96] . The height of a line box is determined by the rules given in the section on line height calculations [p. 141] . A line box is always tall enough for all of the boxes it contains. However, it may be taller than the tallest box it contains (if, for example, boxes are aligned so that baselines line up). When the height of a box B is less than the height of the line box containing it, the vertical alignment of B within the line box 105
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REC-CSS2-19980512 Cascading Style S
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Quick Table of Contents 1 About the
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4.3.4 URL + URN = URI . . . . . . .
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9.7 Relationships between ’displa
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cursive . . . . . . . . . . . . . 2
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B.1 New functionality . . . . . . .
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Section 2: An introduction to CSS2
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Initial This part specifies the pro
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The section on Paged Media was in l
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Contents 2 Introduction to CSS2 2.1
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CSS2 has more than 100 different pr
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Adding more rules to the style shee
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Simplicity. CSS2 is more complex th
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Document language The encoding lang
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3.2 Conformance This section define
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Contents 4 CSS2 syntax and basic da
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Macro Definition ident name nmstart
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In fact, these two methods may be c
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P[example="public class foo\ {\ pri
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A user agent conforming to a future
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0.28 mm 1.4 mm viewer 28 inch 71 cm
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Example(s): An example without quot
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Values outside the device gamut sho
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When a style sheet resides in a sep
Page 53 and 54: Contents 5 Selectors 5.1 Pattern ma
Page 55 and 56: 5.2 Selector syntax A simple select
Page 57 and 58: 5.6 Child selectors A child selecto
Page 59 and 60: Example(s): The following rule hide
Page 61 and 62: H1#chapter1 { text-align: center }
Page 63 and 64: Example(s): The following rule sets
Page 65 and 66: 5.11.4 The language pseudo-class: :
Page 67 and 68: The following CSS2 will make a drop
Page 69 and 70: 6 Assigning property values, Cascad
Page 71 and 72: BODY { font-size: 10pt } H1 { font-
Page 73 and 74: 6.4.1 Cascading order To find the v
Page 75: author style sheet and may be overr
Page 78 and 79: Link to a target medium The bo
Page 80 and 81: Relationship between media groups a
Page 82 and 83: Top TM TB TP Margin (Transparent) B
Page 84 and 85: First element of list Second elemen
Page 86 and 87: Value: {1,4} | inherit Initial: not
Page 88 and 89: values, they apply to the top, righ
Page 90 and 91: ’border-color’ Value: {1,4} | t
Page 92 and 93: Since the initial value of the bord
Page 95 and 96: Contents 9 Visual formatting model
Page 97 and 98: 9.2 Controlling box generation The
Page 99 and 100: The P generates a block box, with s
Page 101 and 102: The properties of the run-in elemen
Page 103: Value: static | relative | absolute
Page 107 and 108: or like this: Several emphasized wo
Page 109 and 110: IMG { float: left } BODY, P, IMG {
Page 111 and 112: image margin paragraph border parag
Page 113 and 114: Values have the following meanings
Page 115 and 116: position: fixed; width: 100%; heigh
Page 117 and 118: Document Window (0,0) (0, 400) 1 Be
Page 119 and 120: Document Window (0,0) (0, 400) 24 p
Page 125 and 126: Document Window I used two red hyph
Page 127 and 128: This text will be beneath everythi
Page 129 and 130: (U+202C) at the end of the element.
Page 131 and 132: Contents 10 Visual formatting model
Page 133 and 134: #div1 { position: absolute; left: 5
Page 135 and 136: (If the border style is ’none’,
Page 137 and 138: ’max-width’ Value: Initial: App
Page 139 and 140: 10.6.1 Inline, non-replaced element
Page 141 and 142: Value: Initial: Applies to: | | n
Page 143 and 144: . We recommend a computed value for
Page 145 and 146: Contents 11 Visual effects 11.1 Ove
Page 147 and 148: DIV I didn’t like the play, but t
Page 149 and 150: (0, 0) (50, 0) clip region (0, 55)
Page 151 and 152: onclick=’show("container2");hid
Page 153 and 154: 12 Generated content, automatic num
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the pseudo-element will behave as i
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’block’: the pseudo-element is
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Approximate rendering ISO 10646 cod
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Value: [ ? ]+ | none | inherit Ini
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Example(s): The following style she
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first or last line box exists in a
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This is a very short document. This
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decimal Decimal numbers, beginning
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inside The marker box is the first
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OL.alpha { list-style: lower-alpha
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Contents 13 Paged media 13.1 Introd
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Sheet Page box A D Page content B C
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13.2.3 Crop marks: the ’marks’
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13.3.1 Break before/after elements:
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Value: | inherit Initial: 2 Applie
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13.4 Cascading in the page context
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Contents 14 Colors and Backgrounds
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This property sets the background i
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User agents may treat ’fixed’ a
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14.3 Gamma correction For informati
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Contents 15 Fonts 15.1 Introduction
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In the CSS2 font model, as in CSS1,
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15.2.2 Font family: the ’font-fam
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normal font. italic Specifies a fon
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1. ultra-condensed 2. extra-condens
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Specifies the aspect value. The num
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15.2.5 Shorthand font property: the
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menu The font used in menus (e.g.,
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Latin fonts Greek fonts Cyrillic fo
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page can be displayed. Progressive
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15.3.2 Descriptors for Selecting a
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15.3.3 Descriptors for Font Data Qu
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Value: [ [format( [, ]*)] | ] [,
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’stemv’ (Descriptor) Value: In
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the extras are ignored. [p. 42] Exa
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Swiss 721 light Swiss 721 Swiss 721
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The ideal solution would be to have
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15.4.11 Lower Baseline This gives t
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15.4.19 Vertical stem width This is
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The per-descriptor matching rules f
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The next example defines a family o
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Contents 16 Text 16.1 Indentation:
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16.3.1 Underlining, overlining, str
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Example(s): Consider this example:
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This property controls capitalizati
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Contents 17 Tables 17.1 Introductio
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other document languages (such as X
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’table-footer-group’) element T
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caption’s margin caption caption
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current margins text text text prev
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cells rows row groups columns colum
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The two algorithms are described be
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percentage values of ’height’ r
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The lengths specify the distance th
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order−width padding padding borde
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An example of a table with collapse
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Each document language may have dif
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270
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help Help is available for the obje
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18.3 User preferences for fonts As
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Example(s): For example, to draw a
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spatial audio), and paragraphs of c
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Value: | | inherit Initial: depen
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Example(s): The following two rules
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far-right Same as ’60deg’. With
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fast Same as 300 words per minute.
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Values have the following meanings:
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290
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SUB { vertical-align: sub } SUP { v
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Dynamic outlines [p. 274] . B.2 Upd
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the native font format on the Amiga
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TrueDoc TrueDoc technology was deve
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Square Cove (4) Obtuse Square Cove
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XHeight Standard/Serifed (4) High/T
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Block Add Block name Unicode range
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This table suggests where such info
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308
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pseudo_page : ’:’ IDENT ; font_
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{num}rad {num}grad {num}ms {num}s {
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[RFC1808] "Relative Uniform Resourc
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[RFC1630] "Universal Resource Ident
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Name ’border-top-width’ [p. 88]
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Name ’list-style-type’ [p. 168]
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Name ’speech-rate’ [p. 285] Val
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Name Values Initial value ’mathli
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’ascent’ (descriptor), 222 aspe
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close-quote, 159, 155 collapsing ma
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font family, 198 font set, 199 font
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definition of, 43 ’letter-spacing
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page model, 175 page selector, 176
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simple selector, 55 ’size’, 177
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valid style sheet, 29 value, 41 ver
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