module CGI::HtmlExtension
Mixin module providing HTML generation methods.
For example,
cgi.a("http://www.example.com") { "Example" }
# => "<A HREF=\"http://www.example.com\">Example</A>"
Modules Html3, Html4, etc., contain more basic HTML-generation methods (#title, #h1, etc.).
See class CGI for a detailed example.
Public Instance Methods
# File lib/cgi/html.rb, line 96
def a(href = "") # :yield:
attributes = if href.kind_of?(String)
{ "HREF" => href }
else
href
end
super(attributes)
end Generate an Anchor element as a string.
href can either be a string, giving the URL for the HREF attribute, or it can be a hash of the element's attributes.
The body of the element is the string returned by the no-argument block passed in.
a("http://www.example.com") { "Example" }
# => "<A HREF=\"http://www.example.com\">Example</A>"
a("HREF" => "http://www.example.com", "TARGET" => "_top") { "Example" }
# => "<A HREF=\"http://www.example.com\" TARGET=\"_top\">Example</A>"
# File lib/cgi/html.rb, line 114
def base(href = "") # :yield:
attributes = if href.kind_of?(String)
{ "HREF" => href }
else
href
end
super(attributes)
end Generate a Document Base URI element as a String.
href can either by a string, giving the base URL for the HREF attribute, or it can be a has of the element's attributes.
The passed-in no-argument block is ignored.
base("http://www.example.com/cgi")
# => "<BASE HREF=\"http://www.example.com/cgi\">"
# File lib/cgi/html.rb, line 133
def blockquote(cite = {}) # :yield:
attributes = if cite.kind_of?(String)
{ "CITE" => cite }
else
cite
end
super(attributes)
end Generate a BlockQuote element as a string.
cite can either be a string, give the URI for the source of the quoted text, or a hash, giving all attributes of the element, or it can be omitted, in which case the element has no attributes.
The body is provided by the passed-in no-argument block
blockquote("http://www.example.com/quotes/foo.html") { "Foo!" }
#=> "<BLOCKQUOTE CITE=\"http://www.example.com/quotes/foo.html\">Foo!</BLOCKQUOTE>
# File lib/cgi/html.rb, line 153
def caption(align = {}) # :yield:
attributes = if align.kind_of?(String)
{ "ALIGN" => align }
else
align
end
super(attributes)
end Generate a Table Caption element as a string.
align can be a string, giving the alignment of the caption (one of top, bottom, left, or right). It can be a hash of all the attributes of the element. Or it can be omitted.
The body of the element is provided by the passed-in no-argument block.
caption("left") { "Capital Cities" }
# => <CAPTION ALIGN=\"left\">Capital Cities</CAPTION>
# File lib/cgi/html.rb, line 179
def checkbox(name = "", value = nil, checked = nil)
attributes = if name.kind_of?(String)
{ "TYPE" => "checkbox", "NAME" => name,
"VALUE" => value, "CHECKED" => checked }
else
name["TYPE"] = "checkbox"
name
end
input(attributes)
end Generate a Checkbox Input element as a string.
The attributes of the element can be specified as three arguments, name, value, and checked. checked is a boolean value; if true, the CHECKED attribute will be included in the element.
Alternatively, the attributes can be specified as a hash.
checkbox("name")
# = checkbox("NAME" => "name")
checkbox("name", "value")
# = checkbox("NAME" => "name", "VALUE" => "value")
checkbox("name", "value", true)
# = checkbox("NAME" => "name", "VALUE" => "value", "CHECKED" => true)
# File lib/cgi/html.rb, line 233
def checkbox_group(name = "", *values)
if name.kind_of?(Hash)
values = name["VALUES"]
name = name["NAME"]
end
values.collect{|value|
if value.kind_of?(String)
checkbox(name, value) + value
else
if value[-1] == true || value[-1] == false
checkbox(name, value[0], value[-1]) +
value[-2]
else
checkbox(name, value[0]) +
value[-1]
end
end
}.join
end Generate a sequence of checkbox elements, as a String.
The checkboxes will all have the same name attribute. Each checkbox is followed by a label. There will be one checkbox for each value. Each value can be specified as a String, which will be used both as the value of the VALUE attribute and as the label for that checkbox. A single-element array has the same effect.
Each value can also be specified as a three-element array. The first element is the VALUE attribute; the second is the label; and the third is a boolean specifying whether this checkbox is CHECKED.
Each value can also be specified as a two-element array, by omitting either the value element (defaults to the same as the label), or the boolean checked element (defaults to false).
checkbox_group("name", "foo", "bar", "baz")
# <INPUT TYPE="checkbox" NAME="name" VALUE="foo">foo
# <INPUT TYPE="checkbox" NAME="name" VALUE="bar">bar
# <INPUT TYPE="checkbox" NAME="name" VALUE="baz">baz
checkbox_group("name", ["foo"], ["bar", true], "baz")
# <INPUT TYPE="checkbox" NAME="name" VALUE="foo">foo
# <INPUT TYPE="checkbox" CHECKED NAME="name" VALUE="bar">bar
# <INPUT TYPE="checkbox" NAME="name" VALUE="baz">baz
checkbox_group("name", ["1", "Foo"], ["2", "Bar", true], "Baz")
# <INPUT TYPE="checkbox" NAME="name" VALUE="1">Foo
# <INPUT TYPE="checkbox" CHECKED NAME="name" VALUE="2">Bar
# <INPUT TYPE="checkbox" NAME="name" VALUE="Baz">Baz
checkbox_group("NAME" => "name",
"VALUES" => ["foo", "bar", "baz"])
checkbox_group("NAME" => "name",
"VALUES" => [["foo"], ["bar", true], "baz"])
checkbox_group("NAME" => "name",
"VALUES" => [["1", "Foo"], ["2", "Bar", true], "Baz"])
# File lib/cgi/html.rb, line 275
def file_field(name = "", size = 20, maxlength = nil)
attributes = if name.kind_of?(String)
{ "TYPE" => "file", "NAME" => name,
"SIZE" => size.to_s }
else
name["TYPE"] = "file"
name
end
attributes["MAXLENGTH"] = maxlength.to_s if maxlength
input(attributes)
end Generate an File Upload Input element as a string.
The attributes of the element can be specified as three arguments, name, size, and maxlength. maxlength is the maximum length of the file's name, not of the file's contents.
Alternatively, the attributes can be specified as a hash.
See multipart_form() for forms that include file uploads.
file_field("name")
# <INPUT TYPE="file" NAME="name" SIZE="20">
file_field("name", 40)
# <INPUT TYPE="file" NAME="name" SIZE="40">
file_field("name", 40, 100)
# <INPUT TYPE="file" NAME="name" SIZE="40" MAXLENGTH="100">
file_field("NAME" => "name", "SIZE" => 40)
# <INPUT TYPE="file" NAME="name" SIZE="40">
# File lib/cgi/html.rb, line 309
def form(method = "post", action = script_name, enctype = "application/x-www-form-urlencoded")
attributes = if method.kind_of?(String)
{ "METHOD" => method, "ACTION" => action,
"ENCTYPE" => enctype }
else
unless method.has_key?("METHOD")
method["METHOD"] = "post"
end
unless method.has_key?("ENCTYPE")
method["ENCTYPE"] = enctype
end
method
end
if block_given?
body = yield
else
body = ""
end
if @output_hidden
body << @output_hidden.collect{|k,v|
"<INPUT TYPE=\"HIDDEN\" NAME=\"#{k}\" VALUE=\"#{v}\">"
}.join
end
super(attributes){body}
end Generate a Form element as a string.
method should be either “get” or “post”, and defaults to the latter. action defaults to the current CGI script name. enctype defaults to “application/x-www-form-urlencoded”.
Alternatively, the attributes can be specified as a hash.
See also multipart_form() for forms that include file uploads.
form{ "string" }
# <FORM METHOD="post" ENCTYPE="application/x-www-form-urlencoded">string</FORM>
form("get") { "string" }
# <FORM METHOD="get" ENCTYPE="application/x-www-form-urlencoded">string</FORM>
form("get", "url") { "string" }
# <FORM METHOD="get" ACTION="url" ENCTYPE="application/x-www-form-urlencoded">string</FORM>
form("METHOD" => "post", "ENCTYPE" => "enctype") { "string" }
# <FORM METHOD="post" ENCTYPE="enctype">string</FORM>
Generate a Hidden Input element as a string.
The attributes of the element can be specified as two arguments, name and value.
Alternatively, the attributes can be specified as a hash.
hidden("name")
# <INPUT TYPE="hidden" NAME="name">
hidden("name", "value")
# <INPUT TYPE="hidden" NAME="name" VALUE="value">
hidden("NAME" => "name", "VALUE" => "reset", "ID" => "foo")
# <INPUT TYPE="hidden" NAME="name" VALUE="value" ID="foo">
# File lib/cgi/html.rb, line 402
def html(attributes = {}) # :yield:
if nil == attributes
attributes = {}
elsif "PRETTY" == attributes
attributes = { "PRETTY" => true }
end
pretty = attributes.delete("PRETTY")
pretty = " " if true == pretty
buf = ""
if attributes.has_key?("DOCTYPE")
if attributes["DOCTYPE"]
buf << attributes.delete("DOCTYPE")
else
attributes.delete("DOCTYPE")
end
else
buf << doctype
end
buf << super(attributes)
if pretty
CGI::pretty(buf, pretty)
else
buf
end
end Generate a top-level HTML element as a string.
The attributes of the element are specified as a hash. The pseudo-attribute “PRETTY” can be used to specify that the generated HTML string should be indented. “PRETTY” can also be specified as a string as the sole argument to this method. The pseudo-attribute “DOCTYPE”, if given, is used as the leading DOCTYPE SGML tag; it should include the entire text of this tag, including angle brackets.
The body of the html element is supplied as a block.
html{ "string" }
# <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><HTML>string</HTML>
html("LANG" => "ja") { "string" }
# <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><HTML LANG="ja">string</HTML>
html("DOCTYPE" => false) { "string" }
# <HTML>string</HTML>
html("DOCTYPE" => '<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">') { "string" }
# <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"><HTML>string</HTML>
html("PRETTY" => " ") { "<BODY></BODY>" }
# <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
# <HTML>
# <BODY>
# </BODY>
# </HTML>
html("PRETTY" => "\t") { "<BODY></BODY>" }
# <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
# <HTML>
# <BODY>
# </BODY>
# </HTML>
html("PRETTY") { "<BODY></BODY>" }
# = html("PRETTY" => " ") { "<BODY></BODY>" }
html(if $VERBOSE then "PRETTY" end) { "HTML string" }
# File lib/cgi/html.rb, line 447
def image_button(src = "", name = nil, alt = nil)
attributes = if src.kind_of?(String)
{ "TYPE" => "image", "SRC" => src, "NAME" => name,
"ALT" => alt }
else
src["TYPE"] = "image"
src["SRC"] ||= ""
src
end
input(attributes)
end Generate an Image Button Input element as a string.
src is the URL of the image to use for the button. name is the input name. alt is the alternative text for the image.
Alternatively, the attributes can be specified as a hash.
image_button("url")
# <INPUT TYPE="image" SRC="url">
image_button("url", "name", "string")
# <INPUT TYPE="image" SRC="url" NAME="name" ALT="string">
image_button("SRC" => "url", "ALT" => "string")
# <INPUT TYPE="image" SRC="url" ALT="string">
# File lib/cgi/html.rb, line 473
def img(src = "", alt = "", width = nil, height = nil)
attributes = if src.kind_of?(String)
{ "SRC" => src, "ALT" => alt }
else
src
end
attributes["WIDTH"] = width.to_s if width
attributes["HEIGHT"] = height.to_s if height
super(attributes)
end Generate an Image element as a string.
src is the URL of the image. alt is the alternative text for the image. width is the width of the image, and height is its height.
Alternatively, the attributes can be specified as a hash.
img("src", "alt", 100, 50)
# <IMG SRC="src" ALT="alt" WIDTH="100" HEIGHT="50">
img("SRC" => "src", "ALT" => "alt", "WIDTH" => 100, "HEIGHT" => 50)
# <IMG SRC="src" ALT="alt" WIDTH="100" HEIGHT="50">
# File lib/cgi/html.rb, line 499
def multipart_form(action = nil, enctype = "multipart/form-data")
attributes = if action == nil
{ "METHOD" => "post", "ENCTYPE" => enctype }
elsif action.kind_of?(String)
{ "METHOD" => "post", "ACTION" => action,
"ENCTYPE" => enctype }
else
unless action.has_key?("METHOD")
action["METHOD"] = "post"
end
unless action.has_key?("ENCTYPE")
action["ENCTYPE"] = enctype
end
action
end
if block_given?
form(attributes){ yield }
else
form(attributes)
end
end Generate a Form element with multipart encoding as a String.
Multipart encoding is used for forms that include file uploads.
action is the action to perform. enctype is the encoding type, which defaults to “multipart/form-data”.
Alternatively, the attributes can be specified as a hash.
multipart_form{ "string" }
# <FORM METHOD="post" ENCTYPE="multipart/form-data">string</FORM>
multipart_form("url") { "string" }
# <FORM METHOD="post" ACTION="url" ENCTYPE="multipart/form-data">string</FORM>
# File lib/cgi/html.rb, line 541
def password_field(name = "", value = nil, size = 40, maxlength = nil)
attributes = if name.kind_of?(String)
{ "TYPE" => "password", "NAME" => name,
"VALUE" => value, "SIZE" => size.to_s }
else
name["TYPE"] = "password"
name
end
attributes["MAXLENGTH"] = maxlength.to_s if maxlength
input(attributes)
end Generate a Password Input element as a string.
name is the name of the input field. value is its default value. size is the size of the input field display. maxlength is the maximum length of the inputted password.
Alternatively, attributes can be specified as a hash.
password_field("name")
# <INPUT TYPE="password" NAME="name" SIZE="40">
password_field("name", "value")
# <INPUT TYPE="password" NAME="name" VALUE="value" SIZE="40">
password_field("password", "value", 80, 200)
# <INPUT TYPE="password" NAME="name" VALUE="value" SIZE="80" MAXLENGTH="200">
password_field("NAME" => "name", "VALUE" => "value")
# <INPUT TYPE="password" NAME="name" VALUE="value">
Generate a Select element as a string.
name is the name of the element. The values are the options that can be selected from the Select menu. Each value can be a String or a one, two, or three-element Array. If a String or a one-element Array, this is both the value of that option and the text displayed for it. If a three-element Array, the elements are the option value, displayed text, and a boolean value specifying whether this option starts as selected. The two-element version omits either the option value (defaults to the same as the display text) or the boolean selected specifier (defaults to false).
The attributes and options can also be specified as a hash. In this case, options are specified as an array of values as described above, with the hash key of “VALUES”.
popup_menu("name", "foo", "bar", "baz")
# <SELECT NAME="name">
# <OPTION VALUE="foo">foo</OPTION>
# <OPTION VALUE="bar">bar</OPTION>
# <OPTION VALUE="baz">baz</OPTION>
# </SELECT>
popup_menu("name", ["foo"], ["bar", true], "baz")
# <SELECT NAME="name">
# <OPTION VALUE="foo">foo</OPTION>
# <OPTION VALUE="bar" SELECTED>bar</OPTION>
# <OPTION VALUE="baz">baz</OPTION>
# </SELECT>
popup_menu("name", ["1", "Foo"], ["2", "Bar", true], "Baz")
# <SELECT NAME="name">
# <OPTION VALUE="1">Foo</OPTION>
# <OPTION SELECTED VALUE="2">Bar</OPTION>
# <OPTION VALUE="Baz">Baz</OPTION>
# </SELECT>
popup_menu("NAME" => "name", "SIZE" => 2, "MULTIPLE" => true,
"VALUES" => [["1", "Foo"], ["2", "Bar", true], "Baz"])
# <SELECT NAME="name" MULTIPLE SIZE="2">
# <OPTION VALUE="1">Foo</OPTION>
# <OPTION SELECTED VALUE="2">Bar</OPTION>
# <OPTION VALUE="Baz">Baz</OPTION>
# </SELECT>
# File lib/cgi/html.rb, line 645
def radio_button(name = "", value = nil, checked = nil)
attributes = if name.kind_of?(String)
{ "TYPE" => "radio", "NAME" => name,
"VALUE" => value, "CHECKED" => checked }
else
name["TYPE"] = "radio"
name
end
input(attributes)
end Generates a radio-button Input element.
name is the name of the input field. value is the value of the field if checked. checked specifies whether the field starts off checked.
Alternatively, the attributes can be specified as a hash.
radio_button("name", "value")
# <INPUT TYPE="radio" NAME="name" VALUE="value">
radio_button("name", "value", true)
# <INPUT TYPE="radio" NAME="name" VALUE="value" CHECKED>
radio_button("NAME" => "name", "VALUE" => "value", "ID" => "foo")
# <INPUT TYPE="radio" NAME="name" VALUE="value" ID="foo">
# File lib/cgi/html.rb, line 684
def radio_group(name = "", *values)
if name.kind_of?(Hash)
values = name["VALUES"]
name = name["NAME"]
end
values.collect{|value|
if value.kind_of?(String)
radio_button(name, value) + value
else
if value[-1] == true || value[-1] == false
radio_button(name, value[0], value[-1]) +
value[-2]
else
radio_button(name, value[0]) +
value[-1]
end
end
}.join
end Generate a sequence of radio button Input elements, as a String.
This works the same as checkbox_group(). However, it is not valid to have more than one radiobutton in a group checked.
radio_group("name", "foo", "bar", "baz")
# <INPUT TYPE="radio" NAME="name" VALUE="foo">foo
# <INPUT TYPE="radio" NAME="name" VALUE="bar">bar
# <INPUT TYPE="radio" NAME="name" VALUE="baz">baz
radio_group("name", ["foo"], ["bar", true], "baz")
# <INPUT TYPE="radio" NAME="name" VALUE="foo">foo
# <INPUT TYPE="radio" CHECKED NAME="name" VALUE="bar">bar
# <INPUT TYPE="radio" NAME="name" VALUE="baz">baz
radio_group("name", ["1", "Foo"], ["2", "Bar", true], "Baz")
# <INPUT TYPE="radio" NAME="name" VALUE="1">Foo
# <INPUT TYPE="radio" CHECKED NAME="name" VALUE="2">Bar
# <INPUT TYPE="radio" NAME="name" VALUE="Baz">Baz
radio_group("NAME" => "name",
"VALUES" => ["foo", "bar", "baz"])
radio_group("NAME" => "name",
"VALUES" => [["foo"], ["bar", true], "baz"])
radio_group("NAME" => "name",
"VALUES" => [["1", "Foo"], ["2", "Bar", true], "Baz"])
# File lib/cgi/html.rb, line 719
def reset(value = nil, name = nil)
attributes = if (not value) or value.kind_of?(String)
{ "TYPE" => "reset", "VALUE" => value, "NAME" => name }
else
value["TYPE"] = "reset"
value
end
input(attributes)
end Generate a reset button Input element, as a String.
This resets the values on a form to their initial values. value is the text displayed on the button. name is the name of this button.
Alternatively, the attributes can be specified as a hash.
reset
# <INPUT TYPE="reset">
reset("reset")
# <INPUT TYPE="reset" VALUE="reset">
reset("VALUE" => "reset", "ID" => "foo")
# <INPUT TYPE="reset" VALUE="reset" ID="foo">
# File lib/cgi/html.rb, line 749
def submit(value = nil, name = nil)
attributes = if (not value) or value.kind_of?(String)
{ "TYPE" => "submit", "VALUE" => value, "NAME" => name }
else
value["TYPE"] = "submit"
value
end
input(attributes)
end Generate a submit button Input element, as a String.
value is the text to display on the button. name is the name of the input.
Alternatively, the attributes can be specified as a hash.
submit
# <INPUT TYPE="submit">
submit("ok")
# <INPUT TYPE="submit" VALUE="ok">
submit("ok", "button1")
# <INPUT TYPE="submit" VALUE="ok" NAME="button1">
submit("VALUE" => "ok", "NAME" => "button1", "ID" => "foo")
# <INPUT TYPE="submit" VALUE="ok" NAME="button1" ID="foo">
# File lib/cgi/html.rb, line 781
def text_field(name = "", value = nil, size = 40, maxlength = nil)
attributes = if name.kind_of?(String)
{ "TYPE" => "text", "NAME" => name, "VALUE" => value,
"SIZE" => size.to_s }
else
name["TYPE"] = "text"
name
end
attributes["MAXLENGTH"] = maxlength.to_s if maxlength
input(attributes)
end Generate a text field Input element, as a String.
name is the name of the input field. value is its initial value. size is the size of the input area. maxlength is the maximum length of input accepted.
Alternatively, the attributes can be specified as a hash.
text_field("name")
# <INPUT TYPE="text" NAME="name" SIZE="40">
text_field("name", "value")
# <INPUT TYPE="text" NAME="name" VALUE="value" SIZE="40">
text_field("name", "value", 80)
# <INPUT TYPE="text" NAME="name" VALUE="value" SIZE="80">
text_field("name", "value", 80, 200)
# <INPUT TYPE="text" NAME="name" VALUE="value" SIZE="80" MAXLENGTH="200">
text_field("NAME" => "name", "VALUE" => "value")
# <INPUT TYPE="text" NAME="name" VALUE="value">
# File lib/cgi/html.rb, line 807
def textarea(name = "", cols = 70, rows = 10) # :yield:
attributes = if name.kind_of?(String)
{ "NAME" => name, "COLS" => cols.to_s,
"ROWS" => rows.to_s }
else
name
end
super(attributes)
end Generate a TextArea element, as a String.
name is the name of the textarea. cols is the number of columns and rows is the number of rows in the display.
Alternatively, the attributes can be specified as a hash.
The body is provided by the passed-in no-argument block
textarea("name")
# = textarea("NAME" => "name", "COLS" => 70, "ROWS" => 10)
textarea("name", 40, 5)
# = textarea("NAME" => "name", "COLS" => 40, "ROWS" => 5)
Ruby Core © 1993–2017 Yukihiro Matsumoto
Licensed under the Ruby License.
Ruby Standard Library © contributors
Licensed under their own licenses.