/usr/share/tcltk/tcllib1.14/html/html.tcl is in tcllib 1.14-dfsg-1.
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1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 | # html.tcl --
#
# Procedures to make generating HTML easier.
#
# This module depends on the ncgi module for the procedures
# that initialize form elements based on current CGI values.
#
# Copyright (c) 1998-2000 by Ajuba Solutions.
# Copyright (c) 2006 Michael Schlenker <mic42@users.sourceforge.net>
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
# Originally by Brent Welch, with help from Dan Kuchler and Melissa Chawla
package require Tcl 8.2
package require ncgi
package provide html 1.4
namespace eval ::html {
# State about the current page
variable page
# A simple set of global defaults for tag parameters is implemented
# by storing into elements indexed by "key.param", where key is
# often the name of an HTML tag (anything for scoping), and
# param must be the name of the HTML tag parameter (e.g., "href" or "size")
# input.size
# body.bgcolor
# body.text
# font.face
# font.size
# font.color
variable defaults
array set defaults {
input.size 45
body.bgcolor white
body.text black
}
# In order to nandle nested calls to redefined control structures,
# we need a temporary variable that is known not to exist. We keep this
# counter to append to the varname. Each time we need a temporary
# variable, we increment this counter.
variable randVar 0
# No more export, because this defines things like
# foreach and if that do HTML things, not Tcl control
# namespace export *
# Dictionary mapping from special characters to their entities.
variable entities {
\xa0 \xa1 ¡ \xa2 ¢ \xa3 £ \xa4 ¤
\xa5 ¥ \xa6 ¦ \xa7 § \xa8 ¨ \xa9 ©
\xaa ª \xab « \xac ¬ \xad ­ \xae ®
\xaf ¯ \xb0 ° \xb1 ± \xb2 ² \xb3 ³
\xb4 ´ \xb5 µ \xb6 ¶ \xb7 · \xb8 ¸
\xb9 ¹ \xba º \xbb » \xbc ¼ \xbd ½
\xbe ¾ \xbf ¿ \xc0 À \xc1 Á \xc2 Â
\xc3 Ã \xc4 Ä \xc5 Å \xc6 Æ \xc7 Ç
\xc8 È \xc9 É \xca Ê \xcb Ë \xcc Ì
\xcd Í \xce Î \xcf Ï \xd0 Ð \xd1 Ñ
\xd2 Ò \xd3 Ó \xd4 Ô \xd5 Õ \xd6 Ö
\xd7 × \xd8 Ø \xd9 Ù \xda Ú \xdb Û
\xdc Ü \xdd Ý \xde Þ \xdf ß \xe0 à
\xe1 á \xe2 â \xe3 ã \xe4 ä \xe5 å
\xe6 æ \xe7 ç \xe8 è \xe9 é \xea ê
\xeb ë \xec ì \xed í \xee î \xef ï
\xf0 ð \xf1 ñ \xf2 ò \xf3 ó \xf4 ô
\xf5 õ \xf6 ö \xf7 ÷ \xf8 ø \xf9 ù
\xfa ú \xfb û \xfc ü \xfd ý \xfe þ
\xff ÿ \u192 ƒ \u391 Α \u392 Β \u393 Γ
\u394 Δ \u395 Ε \u396 Ζ \u397 Η \u398 Θ
\u399 Ι \u39A Κ \u39B Λ \u39C Μ \u39D Ν
\u39E Ξ \u39F Ο \u3A0 Π \u3A1 Ρ \u3A3 Σ
\u3A4 Τ \u3A5 Υ \u3A6 Φ \u3A7 Χ \u3A8 Ψ
\u3A9 Ω \u3B1 α \u3B2 β \u3B3 γ \u3B4 δ
\u3B5 ε \u3B6 ζ \u3B7 η \u3B8 θ \u3B9 ι
\u3BA κ \u3BB λ \u3BC μ \u3BD ν \u3BE ξ
\u3BF ο \u3C0 π \u3C1 ρ \u3C2 ς \u3C3 σ
\u3C4 τ \u3C5 υ \u3C6 φ \u3C7 χ \u3C8 ψ
\u3C9 ω \u3D1 ϑ \u3D2 ϒ \u3D6 ϖ
\u2022 • \u2026 … \u2032 ′ \u2033 ″
\u203E ‾ \u2044 ⁄ \u2118 ℘ \u2111 ℑ
\u211C ℜ \u2122 ™ \u2135 ℵ \u2190 ←
\u2191 ↑ \u2192 → \u2193 ↓ \u2194 ↔ \u21B5 ↵
\u21D0 ⇐ \u21D1 ⇑ \u21D2 ⇒ \u21D3 ⇓ \u21D4 ⇔
\u2200 ∀ \u2202 ∂ \u2203 ∃ \u2205 ∅
\u2207 ∇ \u2208 ∈ \u2209 ∉ \u220B ∋ \u220F ∏
\u2211 ∑ \u2212 − \u2217 ∗ \u221A √
\u221D ∝ \u221E ∞ \u2220 ∠ \u2227 ∧ \u2228 ∨
\u2229 ∩ \u222A ∪ \u222B ∫ \u2234 ∴ \u223C ∼
\u2245 ≅ \u2248 ≈ \u2260 ≠ \u2261 ≡ \u2264 ≤
\u2265 ≥ \u2282 ⊂ \u2283 ⊃ \u2284 ⊄ \u2286 ⊆
\u2287 ⊇ \u2295 ⊕ \u2297 ⊗ \u22A5 ⊥
\u22C5 ⋅ \u2308 ⌈ \u2309 ⌉ \u230A ⌊
\u230B ⌋ \u2329 ⟨ \u232A ⟩ \u25CA ◊
\u2660 ♠ \u2663 ♣ \u2665 ♥ \u2666 ♦
\x22 " \x26 & \x3C < \x3E > \u152 Œ
\u153 œ \u160 Š \u161 š \u178 Ÿ
\u2C6 ˆ \u2DC ˜ \u2002   \u2003   \u2009  
\u200C ‌ \u200D ‍ \u200E ‎ \u200F ‏ \u2013 –
\u2014 — \u2018 ‘ \u2019 ’ \u201A ‚
\u201C “ \u201D ” \u201E „ \u2020 †
\u2021 ‡ \u2030 ‰ \u2039 ‹ \u203A ›
\u20AC €
}
}
# ::html::foreach
#
# Rework the "foreach" command to blend into HTML template files.
# Rather than evaluating the body, we return the subst'ed body. Each
# iteration of the loop causes another string to be concatenated to
# the result value. No error checking is done on any arguments.
#
# Arguments:
# varlist Variables to instantiate with values from the next argument.
# list Values to set variables in varlist to.
# args ?varlist2 list2 ...? body, where body is the string to subst
# during each iteration of the loop.
#
# Results:
# Returns a string composed of multiple concatenations of the
# substitued body.
#
# Side Effects:
# None.
proc ::html::foreach {vars vals args} {
variable randVar
# The body of the foreach loop must be run in the stack frame
# above this one in order to have access to local variable at that stack
# level.
# To support nested foreach loops, we use a uniquely named
# variable to store incremental results.
incr randVar
::set resultVar "result_$randVar"
# Extract the body and any varlists and valuelists from the args.
::set body [lindex $args end]
::set varvals [linsert [lreplace $args end end] 0 $vars $vals]
# Create the script to eval in the stack frame above this one.
::set script "::foreach"
::foreach {vars vals} $varvals {
append script " [list $vars] [list $vals]"
}
append script " \{\n"
append script " append $resultVar \[subst \{$body\}\]\n"
append script "\}\n"
# Create a temporary variable in the stack frame above this one,
# and use it to store the incremental results of the multiple loop
# iterations. Remove the temporary variable when we're done so there's
# no trace of this loop left in that stack frame.
upvar 1 $resultVar tmp
::set tmp ""
uplevel 1 $script
::set result $tmp
unset tmp
return $result
}
# ::html::for
#
# Rework the "for" command to blend into HTML template files.
# Rather than evaluating the body, we return the subst'ed body. Each
# iteration of the loop causes another string to be concatenated to
# the result value. No error checking is done on any arguments.
#
# Arguments:
# start A script to evaluate once at the very beginning.
# test An expression to eval before each iteration of the loop.
# Once the expression is false, the command returns.
# next A script to evaluate after each iteration of the loop.
# body The string to subst during each iteration of the loop.
#
# Results:
# Returns a string composed of multiple concatenations of the
# substitued body.
#
# Side Effects:
# None.
proc ::html::for {start test next body} {
variable randVar
# The body of the for loop must be run in the stack frame
# above this one in order to have access to local variable at that stack
# level.
# To support nested for loops, we use a uniquely named
# variable to store incremental results.
incr randVar
::set resultVar "result_$randVar"
# Create the script to eval in the stack frame above this one.
::set script "::for [list $start] [list $test] [list $next] \{\n"
append script " append $resultVar \[subst \{$body\}\]\n"
append script "\}\n"
# Create a temporary variable in the stack frame above this one,
# and use it to store the incremental resutls of the multiple loop
# iterations. Remove the temporary variable when we're done so there's
# no trace of this loop left in that stack frame.
upvar 1 $resultVar tmp
::set tmp ""
uplevel 1 $script
::set result $tmp
unset tmp
return $result
}
# ::html::while
#
# Rework the "while" command to blend into HTML template files.
# Rather than evaluating the body, we return the subst'ed body. Each
# iteration of the loop causes another string to be concatenated to
# the result value. No error checking is done on any arguments.
#
# Arguments:
# test An expression to eval before each iteration of the loop.
# Once the expression is false, the command returns.
# body The string to subst during each iteration of the loop.
#
# Results:
# Returns a string composed of multiple concatenations of the
# substitued body.
#
# Side Effects:
# None.
proc ::html::while {test body} {
variable randVar
# The body of the while loop must be run in the stack frame
# above this one in order to have access to local variable at that stack
# level.
# To support nested while loops, we use a uniquely named
# variable to store incremental results.
incr randVar
::set resultVar "result_$randVar"
# Create the script to eval in the stack frame above this one.
::set script "::while [list $test] \{\n"
append script " append $resultVar \[subst \{$body\}\]\n"
append script "\}\n"
# Create a temporary variable in the stack frame above this one,
# and use it to store the incremental resutls of the multiple loop
# iterations. Remove the temporary variable when we're done so there's
# no trace of this loop left in that stack frame.
upvar 1 $resultVar tmp
::set tmp ""
uplevel 1 $script
::set result $tmp
unset tmp
return $result
}
# ::html::if
#
# Rework the "if" command to blend into HTML template files.
# Rather than evaluating a body clause, we return the subst'ed body.
# No error checking is done on any arguments.
#
# Arguments:
# test An expression to eval to decide whether to use the then body.
# body The string to subst if the test case was true.
# args ?elseif test body2 ...? ?else bodyn?, where bodyn is the string
# to subst if none of the tests are true.
#
# Results:
# Returns a string composed by substituting a body clause.
#
# Side Effects:
# None.
proc ::html::if {test body args} {
variable randVar
# The body of the then/else clause must be run in the stack frame
# above this one in order to have access to local variable at that stack
# level.
# To support nested if's, we use a uniquely named
# variable to store incremental results.
incr randVar
::set resultVar "result_$randVar"
# Extract the elseif clauses and else clause if they exist.
::set cmd [linsert $args 0 "::if" $test $body]
::foreach {keyword test body} $cmd {
::if {[string equal $keyword "else"]} {
append script " else \{\n"
::set body $test
} else {
append script " $keyword [list $test] \{\n"
}
append script " append $resultVar \[subst \{$body\}\]\n"
append script "\} "
}
# Create a temporary variable in the stack frame above this one,
# and use it to store the incremental resutls of the multiple loop
# iterations. Remove the temporary variable when we're done so there's
# no trace of this loop left in that stack frame.
upvar $resultVar tmp
::set tmp ""
uplevel $script
::set result $tmp
unset tmp
return $result
}
# ::html::set
#
# Rework the "set" command to blend into HTML template files.
# The return value is always "" so nothing is appended in the
# template. No error checking is done on any arguments.
#
# Arguments:
# var The variable to set.
# val The new value to give the variable.
#
# Results:
# Returns "".
#
# Side Effects:
# None.
proc ::html::set {var val} {
# The variable must be set in the stack frame above this one.
::set cmd [list set $var $val]
uplevel 1 $cmd
return ""
}
# ::html::eval
#
# Rework the "eval" command to blend into HTML template files.
# The return value is always "" so nothing is appended in the
# template. No error checking is done on any arguments.
#
# Arguments:
# args The args to evaluate. At least one must be given.
#
# Results:
# Returns "".
#
# Side Effects:
# Throws an error if no arguments are given.
proc ::html::eval {args} {
# The args must be evaluated in the stack frame above this one.
::eval [linsert $args 0 uplevel 1]
return ""
}
# ::html::init
#
# Reset state that gets accumulated for the current page.
#
# Arguments:
# nvlist Name, value list that is used to initialize default namespace
# variables that set font, size, etc.
#
# Side Effects:
# Wipes the page state array
proc ::html::init {{nvlist {}}} {
variable page
variable defaults
::if {[info exists page]} {
unset page
}
::if {[info exists defaults]} {
unset defaults
}
array set defaults $nvlist
}
# ::html::head
#
# Generate the <head> section. There are a number of
# optional calls you make *before* this to inject
# meta tags - see everything between here and the bodyTag proc.
#
# Arguments:
# title The page title
#
# Results:
# HTML for the <head> section
proc ::html::head {title} {
variable page
::set html "[openTag html][openTag head]\n"
append html "\t[title $title]"
::if {[info exists page(author)]} {
append html "\t$page(author)"
}
::if {[info exists page(meta)]} {
::foreach line $page(meta) {
append html "\t$line\n"
}
}
::if {[info exists page(css)]} {
::foreach style $page(css) {
append html "\t$style\n"
}
}
::if {[info exists page(js)]} {
::foreach script $page(js) {
append html "\t$script\n"
}
}
append html "[closeTag]\n"
}
# ::html::title
#
# Wrap up the <title> and tuck it away for use in the page later.
#
# Arguments:
# title The page title
#
# Results:
# HTML for the <title> section
proc ::html::title {title} {
variable page
::set page(title) $title
::set html "<title>$title</title>\n"
return $html
}
# ::html::getTitle
#
# Return the title of the current page.
#
# Arguments:
# None
#
# Results:
# The title
proc ::html::getTitle {} {
variable page
::if {[info exists page(title)]} {
return $page(title)
} else {
return ""
}
}
# ::html::meta
#
# Generate a meta tag. This tag gets bundled into the <head>
# section generated by html::head
#
# Arguments:
# args A name-value list of meta tag names and values.
#
# Side Effects:
# Stores HTML for the <meta> tag for use later by html::head
proc ::html::meta {args} {
variable page
::set html ""
::foreach {name value} $args {
append html "<meta name=\"$name\" content=\"[quoteFormValue $value]\">"
}
lappend page(meta) $html
return ""
}
# ::html::refresh
#
# Generate a meta refresh tag. This tag gets bundled into the <head>
# section generated by html::head
#
# Arguments:
# content Time period, in seconds, before the refresh
# url (option) new page to view. If not specified, then
# the current page is reloaded.
#
# Side Effects:
# Stores HTML for the <meta> tag for use later by html::head
proc ::html::refresh {content {url {}}} {
variable page
::set html "<meta http-equiv=\"Refresh\" content=\"$content"
::if {[string length $url]} {
append html "; url=$url"
}
append html "\">\n"
lappend page(meta) $html
return ""
}
# ::html::headTag
#
# Embed a tag into the HEAD section
# generated by html::head
#
# Arguments:
# string Everything but the < > for the tag.
#
# Side Effects:
# Stores HTML for the tag for use later by html::head
proc ::html::headTag {string} {
variable page
lappend page(meta) <$string>
return ""
}
# ::html::keywords
#
# Add META tag keywords to the <head> section.
# Call this before you call html::head
#
# Arguments:
# args The keywords
#
# Side Effects:
# See html::meta
proc ::html::keywords {args} {
html::meta keywords [join $args ", "]
}
# ::html::description
#
# Add a description META tag to the <head> section.
# Call this before you call html::head
#
# Arguments:
# description The description
#
# Side Effects:
# See html::meta
proc ::html::description {description} {
html::meta description $description
}
# ::html::author
#
# Add an author comment to the <head> section.
# Call this before you call html::head
#
# Arguments:
# author Author's name
#
# Side Effects:
# sets page(author)
proc ::html::author {author} {
variable page
::set page(author) "<!-- $author -->\n"
return ""
}
# ::html::tagParam
#
# Return a name, value string for the tag parameters.
# The values come from "hard-wired" values in the
# param agrument, or from the defaults set with html::init.
#
# Arguments:
# tag Name of the HTML tag (case insensitive).
# param pname=value info that overrides any default values
#
# Results
# A string of the form:
# pname="keyvalue" name2="2nd value"
proc ::html::tagParam {tag {param {}}} {
variable defaults
::set def ""
::foreach key [lsort [array names defaults $tag.*]] {
append def [default $key $param]
}
return [string trimleft $param$def]
}
# ::html::default
#
# Return a default value, if one has been registered
# and an overriding value does not occur in the existing
# tag parameters.
#
# Arguments:
# key Index into the defaults array defined by html::init
# This is expected to be in the form tag.pname where
# the pname part is used in the tag parameter name
# param pname=value info that overrides any default values
#
# Results
# pname="keyvalue"
proc ::html::default {key {param {}}} {
variable defaults
::set pname [string tolower [lindex [split $key .] 1]]
::set key [string tolower $key]
::if {![regexp -nocase "(\[ \]|^)$pname=" $param] &&
[info exists defaults($key)] &&
[string length $defaults($key)]} {
return " $pname=\"$defaults($key)\""
} else {
return ""
}
}
# ::html::bodyTag
#
# Generate a body tag
#
# Arguments:
# none
#
# Results
# A body tag
proc ::html::bodyTag {args} {
return [openTag body [join $args]]\n
}
# The following procedures are all related to generating form elements
# that are initialized to store the current value of the form element
# based on the CGI state. These functions depend on the ncgi::value
# procedure and assume that the caller has called ncgi::parse and/or
# ncgi::init appropriately to initialize the ncgi module.
# ::html::formValue
#
# Return a name and value pair, where the value is initialized
# from existing form data, if any.
#
# Arguments:
# name The name of the form element
# defvalue A default value to use, if not appears in the CGI
# inputs. DEPRECATED - use ncgi::defValue instead.
#
# Retults:
# A string like:
# name="fred" value="freds value"
proc ::html::formValue {name {defvalue {}}} {
::set value [ncgi::value $name]
::if {[string length $value] == 0} {
::set value $defvalue
}
return "name=\"$name\" value=\"[quoteFormValue $value]\""
}
# ::html::quoteFormValue
#
# Quote a value for use in a value=\"$value\" fragment.
#
# Arguments:
# value The value to quote
#
# Retults:
# A string like:
# "Hello, <b>World!"
proc ::html::quoteFormValue {value} {
return [string map [list "&" "&" "\"" """ \
"'" "'" "<" "<" ">" ">"] $value]
}
# ::html::textInput --
#
# Return an <input type=text> element. This uses the
# input.size default falue.
#
# Arguments:
# name The form element name
# args Additional attributes for the INPUT tag
#
# Results:
# The html fragment
proc ::html::textInput {name {value {}} args} {
::set html "<input type=\"text\" "
append html [formValue $name $value]
append html [default input.size $args]
::if {[llength $args] != 0} then {
append html " " [join $args]
}
append html ">\n"
return $html
}
# ::html::textInputRow --
#
# Format a table row containing a text input element and a label.
#
# Arguments:
# label Label to display next to the form element
# name The form element name
# args Additional attributes for the INPUT tag
#
# Results:
# The html fragment
proc ::html::textInputRow {label name {value {}} args} {
::set html [row $label [::eval [linsert $args 0 html::textInput $name $value]]]
return $html
}
# ::html::passwordInputRow --
#
# Format a table row containing a password input element and a label.
#
# Arguments:
# label Label to display next to the form element
# name The form element name
#
# Results:
# The html fragment
proc ::html::passwordInputRow {label {name password}} {
::set html [row $label [passwordInput $name]]
return $html
}
# ::html::passwordInput --
#
# Return an <input type=password> element.
#
# Arguments:
# name The form element name. Defaults to "password"
#
# Results:
# The html fragment
proc ::html::passwordInput {{name password}} {
::set html "<input type=\"password\" name=\"$name\">\n"
return $html
}
# ::html::checkbox --
#
# Format a checkbox so that it retains its state based on
# the current CGI values
#
# Arguments:
# name The form element name
# value The value associated with the checkbox
#
# Results:
# The html fragment
proc ::html::checkbox {name value} {
::set html "<input type=\"checkbox\" [checkValue $name $value]>\n"
}
# ::html::checkValue
#
# Like html::formalue, but for checkboxes that need CHECKED
#
# Arguments:
# name The name of the form element
# defvalue A default value to use, if not appears in the CGI
# inputs
#
# Retults:
# A string like:
# name="fred" value="freds value" CHECKED
proc ::html::checkValue {name {value 1}} {
::foreach v [ncgi::valueList $name] {
::if {[string compare $value $v] == 0} {
return "name=\"$name\" value=\"[quoteFormValue $value]\" checked"
}
}
return "name=\"$name\" value=\"[quoteFormValue $value]\""
}
# ::html::radioValue
#
# Like html::formValue, but for radioboxes that need CHECKED
#
# Arguments:
# name The name of the form element
# value The value associated with the radio button.
#
# Retults:
# A string like:
# name="fred" value="freds value" CHECKED
proc ::html::radioValue {name value {defaultSelection {}}} {
::if {[string equal $value [ncgi::value $name $defaultSelection]]} {
return "name=\"$name\" value=\"[quoteFormValue $value]\" checked"
} else {
return "name=\"$name\" value=\"[quoteFormValue $value]\""
}
}
# ::html::radioSet --
#
# Display a set of radio buttons while looking for an existing
# value from the query data, if any.
proc ::html::radioSet {key sep list {defaultSelection {}}} {
::set html ""
::set s ""
::foreach {label v} $list {
append html "$s<input type=\"radio\" [radioValue $key $v $defaultSelection]> $label"
::set s $sep
}
return $html
}
# ::html::checkSet --
#
# Display a set of check buttons while looking for an existing
# value from the query data, if any.
proc ::html::checkSet {key sep list} {
::set s ""
::foreach {label v} $list {
append html "$s<input type=\"checkbox\" [checkValue $key $v]> $label"
::set s $sep
}
return $html
}
# ::html::select --
#
# Format a <select> element that retains the state of the
# current CGI values.
#
# Arguments:
# name The form element name
# param The various size, multiple parameters for the tag
# choices A simple list of choices
# current Value to assume if nothing is in CGI state
#
# Results:
# The html fragment
proc ::html::select {name param choices {current {}}} {
::set def [ncgi::valueList $name $current]
::set html "<select name=\"$name\"[string trimright " $param"]>\n"
::foreach {label v} $choices {
::if {[lsearch -exact $def $v] != -1} {
::set SEL " selected"
} else {
::set SEL ""
}
append html "<option value=\"$v\"$SEL>$label\n"
}
append html "</select>\n"
return $html
}
# ::html::selectPlain --
#
# Format a <select> element where the values are the same
# as those that are displayed.
#
# Arguments:
# name The form element name
# param Tag parameters
# choices A simple list of choices
#
# Results:
# The html fragment
proc ::html::selectPlain {name param choices {current {}}} {
::set namevalue {}
::foreach c $choices {
lappend namevalue $c $c
}
return [select $name $param $namevalue $current]
}
# ::html::textarea --
#
# Format a <textarea> element that retains the state of the
# current CGI values.
#
# Arguments:
# name The form element name
# param The various size, multiple parameters for the tag
# current Value to assume if nothing is in CGI state
#
# Results:
# The html fragment
proc ::html::textarea {name {param {}} {current {}}} {
::set value [ncgi::value $name $current]
return "<[string trimright \
"textarea name=\"$name\"\
[tagParam textarea $param]"]>$value</textarea>\n"
}
# ::html::submit --
#
# Format a submit button.
#
# Arguments:
# label The string to appear in the submit button.
# name The name for the submit button element
#
# Results:
# The html fragment
proc ::html::submit {label {name submit}} {
::set html "<input type=\"submit\" name=\"$name\" value=\"$label\">\n"
}
# ::html::varEmpty --
#
# Return true if the variable doesn't exist or is an empty string
#
# Arguments:
# varname Name of the variable
#
# Results:
# 1 if the variable doesn't exist or has the empty value
proc ::html::varEmpty {name} {
upvar 1 $name var
::if {[info exists var]} {
::set value $var
} else {
::set value ""
}
return [expr {[string length [string trim $value]] == 0}]
}
# ::html::getFormInfo --
#
# Generate hidden fields to capture form values.
#
# Arguments:
# args List of elements to save. If this is empty, everything is
# saved in hidden fields. This is a list of string match
# patterns.
#
# Results:
# A bunch of <input type=hidden> elements
proc ::html::getFormInfo {args} {
::if {[llength $args] == 0} {
::set args *
}
::set html ""
::foreach {n v} [ncgi::nvlist] {
::foreach pat $args {
::if {[string match $pat $n]} {
append html "<input type=\"hidden\" name=\"$n\" \
value=\"[quoteFormValue $v]\">\n"
}
}
}
return $html
}
# ::html::h1
# Generate an H1 tag.
#
# Arguments:
# string
# param
#
# Results:
# Formats the tag.
proc ::html::h1 {string {param {}}} {
html::h 1 $string $param
}
proc ::html::h2 {string {param {}}} {
html::h 2 $string $param
}
proc ::html::h3 {string {param {}}} {
html::h 3 $string $param
}
proc ::html::h4 {string {param {}}} {
html::h 4 $string $param
}
proc ::html::h5 {string {param {}}} {
html::h 5 $string $param
}
proc ::html::h6 {string {param {}}} {
html::h 6 $string $param
}
proc ::html::h {level string {param {}}} {
return "<[string trimright "h$level [tagParam h$level $param]"]>$string</h$level>\n"
}
# ::html::openTag
# Remember that a tag is opened so it can be closed later.
# This is used to automatically clean up at the end of a page.
#
# Arguments:
# tag The HTML tag name
# param Any parameters for the tag
#
# Results:
# Formats the tag. Also keeps it around in a per-page stack
# of open tags.
proc ::html::openTag {tag {param {}}} {
variable page
lappend page(stack) $tag
return "<[string trimright "$tag [tagParam $tag $param]"]>"
}
# ::html::closeTag
# Pop a tag from the stack and close it.
#
# Arguments:
# None
#
# Results:
# A close tag. Also pops the stack.
proc ::html::closeTag {} {
variable page
::if {[info exists page(stack)]} {
::set top [lindex $page(stack) end]
::set page(stack) [lreplace $page(stack) end end]
}
::if {[info exists top] && [string length $top]} {
return </$top>
} else {
return ""
}
}
# ::html::end
#
# Close out all the open tags. Especially useful for
# Tables that do not display at all if they are unclosed.
#
# Arguments:
# None
#
# Results:
# Some number of close HTML tags.
proc ::html::end {} {
variable page
::set html ""
::while {[llength $page(stack)]} {
append html [closeTag]\n
}
return $html
}
# ::html::row
#
# Format a table row. If the default font has been set, this
# takes care of wrapping the table cell contents in a font tag.
#
# Arguments:
# args Values to put into the row
#
# Results:
# A <tr><td>...</tr> fragment
proc ::html::row {args} {
::set html <tr>\n
::foreach x $args {
append html \t[cell "" $x td]\n
}
append html "</tr>\n"
return $html
}
# ::html::hdrRow
#
# Format a table row. If the default font has been set, this
# takes care of wrapping the table cell contents in a font tag.
#
# Arguments:
# args Values to put into the row
#
# Results:
# A <tr><th>...</tr> fragment
proc ::html::hdrRow {args} {
variable defaults
::set html <tr>\n
::foreach x $args {
append html \t[cell "" $x th]\n
}
append html "</tr>\n"
return $html
}
# ::html::paramRow
#
# Format a table row. If the default font has been set, this
# takes care of wrapping the table cell contents in a font tag.
#
# Based on html::row
#
# Arguments:
# list Values to put into the row
# rparam Parameters for row
# cparam Parameters for cells
#
# Results:
# A <tr><td>...</tr> fragment
proc ::html::paramRow {list {rparam {}} {cparam {}}} {
::set html "<tr $rparam>\n"
::foreach x $list {
append html \t[cell $cparam $x td]\n
}
append html "</tr>\n"
return $html
}
# ::html::cell
#
# Format a table cell. If the default font has been set, this
# takes care of wrapping the table cell contents in a font tag.
#
# Arguments:
# param Td tag parameters
# value The value to put into the cell
# tag (option) defaults to TD
#
# Results:
# <td>...</td> fragment
proc ::html::cell {param value {tag td}} {
::set font [font]
::if {[string length $font]} {
::set value $font$value</font>
}
return "<[string trimright "$tag $param"]>$value</$tag>"
}
# ::html::tableFromArray
#
# Format a Tcl array into an HTML table
#
# Arguments:
# arrname The name of the array
# param The <table> tag parameters, if any.
# pat A string match pattern for the element keys
#
# Results:
# A <table>
proc ::html::tableFromArray {arrname {param {}} {pat *}} {
upvar 1 $arrname arr
::set html ""
::if {[info exists arr]} {
append html "<table $param>\n"
append html "<tr><th colspan=2>$arrname</th></tr>\n"
::foreach name [lsort [array names arr $pat]] {
append html [row $name $arr($name)]
}
append html </table>\n
}
return $html
}
# ::html::tableFromList
#
# Format a table from a name, value list
#
# Arguments:
# querylist A name, value list
# param The <table> tag parameters, if any.
#
# Results:
# A <table>
proc ::html::tableFromList {querylist {param {}}} {
::set html ""
::if {[llength $querylist]} {
append html "<table $param>"
::foreach {label value} $querylist {
append html [row $label $value]
}
append html </table>
}
return $html
}
# ::html::mailto
#
# Format a mailto: HREF tag
#
# Arguments:
# email The target
# subject The subject of the email, if any
#
# Results:
# A <a href=mailto> tag </a>
proc ::html::mailto {email {subject {}}} {
::set html "<a href=\"mailto:$email"
::if {[string length $subject]} {
append html ?subject=$subject
}
append html "\">$email</a>"
return $html
}
# ::html::font
#
# Generate a standard <font> tag. This depends on defaults being
# set via html::init
#
# Arguments:
# args Font parameters.
#
# Results:
# HTML
proc ::html::font {args} {
# e.g., font.face, font.size, font.color
::set param [tagParam font [join $args]]
::if {[string length $param]} {
return "<[string trimright "font $param"]>"
} else {
return ""
}
}
# ::html::minorMenu
#
# Create a menu of links given a list of label, URL pairs.
# If the URL is the current page, it is not highlighted.
#
# Arguments:
#
# list List that alternates label, url, label, url
# sep Separator between elements
#
# Results:
# html
proc ::html::minorMenu {list {sep { | }}} {
::set s ""
::set html ""
regsub -- {index.h?tml$} [ncgi::urlStub] {} this
::foreach {label url} $list {
regsub -- {index.h?tml$} $url {} that
::if {[string compare $this $that] == 0} {
append html "$s$label"
} else {
append html "$s<a href=\"$url\">$label</a>"
}
::set s $sep
}
return $html
}
# ::html::minorList
#
# Create a list of links given a list of label, URL pairs.
# If the URL is the current page, it is not highlighted.
#
# Based on html::minorMenu
#
# Arguments:
#
# list List that alternates label, url, label, url
# ordered Boolean flag to choose between ordered and
# unordered lists. Defaults to 0, i.e. unordered.
#
# Results:
# A <ul><li><a...><\li>.....<\ul> fragment
# or a <ol><li><a...><\li>.....<\ol> fragment
proc ::html::minorList {list {ordered 0}} {
::set s ""
::set html ""
::if { $ordered } {
append html [openTag ol]
} else {
append html [openTag ul]
}
regsub -- {index.h?tml$} [ncgi::urlStub] {} this
::foreach {label url} $list {
append html [openTag li]
regsub -- {index.h?tml$} $url {} that
::if {[string compare $this $that] == 0} {
append html "$s$label"
} else {
append html "$s<a href=\"$url\">$label</a>"
}
append html [closeTag]
append html \n
}
append html [closeTag]
return $html
}
# ::html::extractParam
#
# Extract a value from parameter list (this needs a re-do)
#
# Arguments:
# param A parameter list. It should alredy have been processed to
# remove any entity references
# key The parameter name
# varName The variable to put the value into (use key as default)
#
# Results:
# returns "1" if the keyword is found, "0" otherwise
proc ::html::extractParam {param key {varName ""}} {
::if {$varName == ""} {
upvar $key result
} else {
upvar $varName result
}
::set ws " \t\n\r"
# look for name=value combinations. Either (') or (") are valid delimeters
::if {
[regsub -nocase [format {.*%s[%s]*=[%s]*"([^"]*).*} $key $ws $ws] $param {\1} value] ||
[regsub -nocase [format {.*%s[%s]*=[%s]*'([^']*).*} $key $ws $ws] $param {\1} value] ||
[regsub -nocase [format {.*%s[%s]*=[%s]*([^%s]+).*} $key $ws $ws $ws] $param {\1} value] } {
::set result $value
return 1
}
# now look for valueless names
# I should strip out name=value pairs, so we don't end up with "name"
# inside the "value" part of some other key word - some day
::set bad \[^a-zA-Z\]+
::if {[regexp -nocase "$bad$key$bad" -$param-]} {
return 1
} else {
return 0
}
}
# ::html::urlParent --
# This is like "file dirname", but doesn't screw with the slashes
# (file dirname will collapse // into /)
#
# Arguments:
# url The URL
#
# Results:
# The parent directory of the URL.
proc ::html::urlParent {url} {
::set url [string trimright $url /]
regsub -- {[^/]+$} $url {} url
return $url
}
# ::html::html_entities --
# Replaces all special characters in the text with their
# entities.
#
# Arguments:
# s The near-HTML text
#
# Results:
# The text with entities in place of specials characters.
proc ::html::html_entities {s} {
variable entities
return [string map $entities $s]
}
# ::html::nl2br --
# Replaces all line-endings in the text with <br> tags.
#
# Arguments:
# s The near-HTML text
#
# Results:
# The text with <br> in place of line-endings.
proc ::html::nl2br {s} {
return [string map [list \n\r <br> \n <br> \r <br>] $s]
}
# ::html::doctype
# Create the DOCTYPE tag and tuck it away for usage
#
# Arguments:
# arg The DOCTYPE you want to declare
#
# Results:
# HTML for the doctype section
proc ::html::doctype {arg} {
variable doctypes
set code [string toupper $arg]
if {![info exists doctypes($code)]} {
return -code error "Unknown doctype \"$arg\""
}
return $doctypes($code)
}
namespace eval ::html {
variable doctypes
array set doctypes {
HTML32 {<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">}
HTML40 {<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">}
HTML40T {<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">}
HTML40F {<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN" "http://www.w3.org/TR/REC-html40/frameset.dtd">}
HTML401 {<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">}
HTML401T {<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">}
HTML401F {<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">}
XHTML10S {<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">}
XHTML10T {<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">}
XHTML10F {<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">}
XHTML11 {<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">}
XHTMLB {<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN" "http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">}
}
}
# ::html::css
# Create the text/css tag and tuck it away for usage
#
# Arguments:
# href The location of the css file to include the filename and path
#
# Results:
# HTML for the section
proc ::html::css {href} {
variable page
set page(css) \
"<link rel=\"stylesheet\" type=\"text/css\" href=\"[quoteFormValue $href]\">\n"
return
}
# ::html::js
# Create the text/javascript tag and tuck it away for usage
#
# Arguments:
# href The location of the javascript file to include the filename and path
#
# Results:
# HTML for the section
proc ::html::js {href} {
variable page
set page(js) \
"<script language=\"javascript\" type=\"text/javascript\" src=\"[quoteFormValue $href]\"></script>\n"
return
}
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