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htmlaudio.mata
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htmlaudio.mata
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// Switch to Mata interpreter/compiler
mata:
// Drops class object if it already exists
// mata drop audio()
// Definition of HTML Tag audio Mata Class
// Defines sound content// Information retrieved from http://www.w3schools.com/tags/tag_audio.asp
class audio extends htmlglobal {
// Define private member variables
private:
// Static/final variables
static string scalar opens, opene, close
// String scalar attributes
string scalar htmlautoplay, htmlcontrols, htmlloop, htmlmuted, htmlpreload, htmlsrc
// Make class args non-static to prevent assignment of class args to all instances of class
string scalar classargs
// Define public members/methods
public:
// Class constructor method
void new()
// Setter methods
class audio scalar setClassArgs(), setAutoplay(), setControls(), setLoop(), setMuted(), setPreload(), setSrc()
// Getter methods
string scalar getOpens(), getOpene(), getClose(), print(), getClassArgs(), getAutoplay(), getControls(), getLoop(), getMuted(), getPreload(), getSrc()
} // End of class declaration
// Class constructor method declaration
void audio::new() {
// Defines the start of the opening tag for the class
this.opens = "<audio"
// Defines the end of the opening tag for the class
this.opene = ">"
// Defines the closing tag for the class
this.close = "</audio>"
} // End of class constructor method definition
// Setter method for class arguments (appear between HTML tags)
class audio scalar audio::setClassArgs(| string scalar classarguments) {
// Defines arguments that appear between HTML tags
this.classargs = classarguments
// Return a copy of the object
return(this)
} // End of setter method for class arguments
// Specifies that the audio will start playing as soon as it is ready
class audio scalar audio::setAutoplay(| string scalar methodarg) {
// Set the attribute autoplay for this class
this.htmlautoplay = `" autoplay=""' + methodarg + `"""'
// Return a copy of the object
return(this)
} // End of Method autoplay declaration for class audio
// Specifies that audio controls should be displayed (such as a play/pause button etc)
class audio scalar audio::setControls(| string scalar methodarg) {
// Set the attribute controls for this class
this.htmlcontrols = `" controls=""' + methodarg + `"""'
// Return a copy of the object
return(this)
} // End of Method controls declaration for class audio
// Specifies that the audio will start over again, every time it is finished
class audio scalar audio::setLoop(| string scalar methodarg) {
// Set the attribute loop for this class
this.htmlloop = `" loop=""' + methodarg + `"""'
// Return a copy of the object
return(this)
} // End of Method loop declaration for class audio
// Specifies that the audio output should be muted
class audio scalar audio::setMuted(| string scalar methodarg) {
// Set the attribute muted for this class
this.htmlmuted = `" muted=""' + methodarg + `"""'
// Return a copy of the object
return(this)
} // End of Method muted declaration for class audio
// Specifies if and how the author thinks the audio should be loaded when the page loads
class audio scalar audio::setPreload(| string scalar methodarg) {
// Validate argument
if (methodarg == "auto" | methodarg == "metadata" | methodarg == "none") {
// Set the attribute value
this.htmlpreload = `" preload=""' + methodarg + `"""'
} // End IF Block for validated argument value
// Return a copy of the object
return(this)
} // End of Method preload declaration for class audio
// Specifies the URL of the audio file
class audio scalar audio::setSrc(| string scalar methodarg) {
// Set the attribute src for this class
this.htmlsrc = `" src=""' + methodarg + `"""'
// Return a copy of the object
return(this)
} // End of Method src declaration for class audio
// Getter method for opening bracket
string scalar audio::getOpens() {
// Returns the opening bracket/tag w/o > character to allow attributes
return(this.opens)
} // End of getter method for opens member of class audio
// Getter method for opening bracket closing character
string scalar audio::getOpene() {
// Returns the closing character for the opening bracket
return(this.opene)
} // End of getter method for opene member of class audio
// Getter method for closing bracket
string scalar audio::getClose() {
// Returns the closing bracket/tag
return(this.close)
} // End of getter method for close member of class audio
// Getter method for class arguments
string scalar audio::getClassArgs() {
// Returns the class arguments that appear between the HTML tags
return(this.classargs)
} // End of getter method for class arguments member of class audio
// Getter method for autoplay member variable
string scalar audio::getAutoplay() {
// Returns the autoplay variable
return(this.htmlautoplay)
} // End of getter method for autoplay member of class audio
// Getter method for controls member variable
string scalar audio::getControls() {
// Returns the controls variable
return(this.htmlcontrols)
} // End of getter method for controls member of class audio
// Getter method for loop member variable
string scalar audio::getLoop() {
// Returns the loop variable
return(this.htmlloop)
} // End of getter method for loop member of class audio
// Getter method for muted member variable
string scalar audio::getMuted() {
// Returns the muted variable
return(this.htmlmuted)
} // End of getter method for muted member of class audio
// Getter method for preload member variable
string scalar audio::getPreload() {
// Returns the preload variable
return(this.htmlpreload)
} // End of getter method for preload member of class audio
// Getter method for src member variable
string scalar audio::getSrc() {
// Returns the src variable
return(this.htmlsrc)
} // End of getter method for src member of class audio
// Get the HTML tag w/attributes and arguments
string scalar audio::print() {
// Create local variables to piece together return string
string scalar open, args, close
// Create opening string
open = getOpens() + getAutoplay() + getControls() + getLoop() + getMuted() + getPreload() + getSrc() + globalAttrs() + getOpene()
// Get class arguments
args = getClassArgs()
// Get closing tag
close = getClose()
// Return the complete HTML string
return(char((10)) + subinstr(open, " >", ">") + args + close + char((10)))
} // End of print method for class audio
// End of Mata session
end