<?php

/**
 * echo the font family based on option id
 */
 
function wpv_font_family($opt_id) {
	echo wpv_get_font_family($opt_id);
}

/**
 * return the font family based on option id
 */
 
function wpv_get_font_family($opt_id) {
	global $wpv_fonts, $used_google_fonts, $used_local_fonts;
	
	$font = wpv_get_option($opt_id . '-face');
	
	// we need the google and local fonts cached, so we can generate the correct @import rules
	
	if(isset($wpv_fonts[$font]['gf'])) {
		if(!is_array($used_google_fonts)) {
			$used_google_fonts = array($wpv_fonts[$font]['gf']);
		}
		else {
			$used_google_fonts[]= $wpv_fonts[$font]['gf'];
		}
	} elseif(isset($wpv_fonts[$font]['local'])) {
		if(!is_array($used_local_fonts)) {
			$used_local_fonts = array($wpv_fonts[$font]['family']);
		}
		else {
			$used_local_fonts[]= $wpv_fonts[$font]['family'];
		}
	}
	
	return $wpv_fonts[$font]['family'];
}

/**
 * return the font family based on option id
 */
 
function wpv_get_font_url($font) {
	global $wpv_fonts;
	
	if(isset($wpv_fonts[$font]['gf'])) {
		// this is a google font
		
		return "http://fonts.googleapis.com/css?family=".$wpv_fonts[$font]['gf']."&subset=cyrillic,greek,latin";
	} elseif(isset($wpv_fonts[$font]['local'])) {
		// this is a local @font-face font
		
		return WPV_FONTS_URI."$font/stylesheet.css";
	}
	
	return '';
}

function wpv_hex2rgba($color, $opacity) {
	return wpv_hex2rgba_plain(wpv_get_option($color), wpv_get_option($opacity));
}

function wpv_hex2rgba_plain($color, $opacity) {
	if($color[0] === '#') {
		$result .= 'rgba(';
		$result .= (string)hexdec($color[1].$color[2]) . ', ';
		$result .= (string)hexdec($color[3].$color[4]) . ', ';
		$result .= (string)hexdec($color[5].$color[6]) . ', ';
		$result .= round($opacity,2) . ')';
		
		return $result;
	}
	
	return '';
}

function wpv_grad_filter($color, $opacity = 1) {
	if($color[0] != '#') {
		return '#00000000';
	}
	
	$color = substr($color, 1);
	
	$result = '#';
	$opacity = dechex(floor($opacity*255));
	if(strlen($opacity) == 1) {
		$opacity .= $opacity;
	}
	$result .= $opacity;
	
	if(strlen($color) == 3) {
		$color .= $color;
	}
	
	$result .= $color;
	
	return $result;
}

function wpv_font($opt) {
?>
	font: <?php wpvge($opt.'-weight')?> <?php wpvge($opt.'-size')?>px/<?php wpvge($opt.'-lheight')?>px <?php wpv_font_family($opt);?>;
<?php
}