// Switch to Mata interpreter/compiler
mata:

// Drops class object if it already exists
// mata drop thead()

// Definition of HTML Tag thead Mata Class
// Groups the header content in a table// Information retrieved from http://www.w3schools.com/tags/tag_thead.asp
class thead extends htmlglobal {

    // Define private member variables
    private:

    // Static/final variables
    static       string  scalar  opens, opene, close

    // String scalar attributes
    string               scalar          htmlalign, htmlchar, htmlcharoff, htmlvalign

    // 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        thead     scalar  setClassArgs(), setAlign(), setChar(), setCharoff(), setValign()

    // Getter methods
    string               scalar          getOpens(), getOpene(), getClose(), print(), getClassArgs(), getAlign(), getChar(), getCharoff(), getValign()

} // End of class declaration

// Class constructor method declaration
void thead::new() {

    // Defines the start of the opening tag for the class
    this.opens = "<thead"

    // Defines the end of the opening tag for the class
    this.opene = ">"

    // Defines the closing tag for the class
    this.close = "</thead>"

} // End of class constructor method definition

// Setter method for class arguments (appear between HTML tags)
class thead scalar thead::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

// Not supported in HTML5.Aligns the content inside the <thead> element
class thead scalar thead::setAlign(| string scalar methodarg) {

    // Validate argument
    if (methodarg == "right" | methodarg == "left" | methodarg == "center" | methodarg == "justify" | methodarg == "char") {

        // Set the attribute value
        this.htmlalign = `" align=""' + methodarg + `"""'

    } // End IF Block for validated argument value

    // Return a copy of the object
    return(this)

} // End of Method align declaration for class thead

// Not supported in HTML5.Aligns the content inside the <thead> element to a character
class thead scalar thead::setChar(| string scalar methodarg) {

    // Set the attribute char for this class
    this.htmlchar = `" char=""' + methodarg + `"""'

    // Return a copy of the object
    return(this)

} // End of Method char declaration for class thead

// Not supported in HTML5.Sets the number of characters the content inside the <thead> element will be aligned from the character specified by the char attribute
class thead scalar thead::setCharoff(| string scalar methodarg) {

    // Set the attribute charoff for this class
    this.htmlcharoff = `" charoff=""' + methodarg + `"""'

    // Return a copy of the object
    return(this)

} // End of Method charoff declaration for class thead

// Not supported in HTML5.Vertical aligns the content inside the <thead> element
class thead scalar thead::setValign(| string scalar methodarg) {

    // Validate argument
    if (methodarg == "top" | methodarg == "middle" | methodarg == "bottom" | methodarg == "baseline") {

        // Set the attribute value
        this.htmlvalign = `" valign=""' + methodarg + `"""'

    } // End IF Block for validated argument value

    // Return a copy of the object
    return(this)

} // End of Method valign declaration for class thead

// Getter method for opening bracket
string scalar thead::getOpens() {

    // Returns the opening bracket/tag w/o > character to allow attributes
    return(this.opens)

} // End of getter method for opens member of class thead

// Getter method for opening bracket closing character
string scalar thead::getOpene() {

    // Returns the closing character for the opening bracket
    return(this.opene)

} // End of getter method for opene member of class thead

// Getter method for closing bracket
string scalar thead::getClose() {

    // Returns the closing bracket/tag
    return(this.close)

} // End of getter method for close member of class thead

// Getter method for class arguments
string scalar thead::getClassArgs() {

    // Returns the class arguments that appear between the HTML tags
    return(this.classargs)

} // End of getter method for class arguments member of class thead

// Getter method for align member variable
string scalar thead::getAlign() {

    // Returns the align variable
    return(this.htmlalign)

} // End of getter method for align member of class thead

// Getter method for char member variable
string scalar thead::getChar() {

    // Returns the char variable
    return(this.htmlchar)

} // End of getter method for char member of class thead

// Getter method for charoff member variable
string scalar thead::getCharoff() {

    // Returns the charoff variable
    return(this.htmlcharoff)

} // End of getter method for charoff member of class thead

// Getter method for valign member variable
string scalar thead::getValign() {

    // Returns the valign variable
    return(this.htmlvalign)

} // End of getter method for valign member of class thead

// Get the HTML tag w/attributes and arguments
string scalar thead::print() {

    // Create local variables to piece together return string
    string scalar open, args, close

    // Create opening string
    open = getOpens() + getAlign() + getChar() + getCharoff() + getValign() + 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 thead

// End of Mata session
end