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✏️ Editing: vc_btn.php

<?php
if ( ! defined( 'ABSPATH' ) ) {
	die( '-1' );
}
/**
 * Shortcode attributes
 * @var $atts
 * @var $style
 * @var $shape
 * @var $color
 * @var $custom_background
 * @var $custom_text
 * @var $size
 * @var $align
 * @var $link
 * @var $title
 * @var $button_block
 * @var $el_id
 * @var $el_class
 * @var $outline_custom_color
 * @var $outline_custom_hover_background
 * @var $outline_custom_hover_text
 * @var $add_icon
 * @var $i_align
 * @var $i_type
 * @var $i_icon_fontawesome
 * @var $i_icon_openiconic
 * @var $i_icon_typicons
 * @var $i_icon_entypo
 * @var $i_icon_linecons
 * @var $i_icon_pixelicons
 * @var $css_animation
 * @var $css
 * @var $gradient_color_1
 * @var $gradient_color_2
 * @var $gradient_custom_color_1 ;
 * @var $gradient_custom_color_2 ;
 * @var $gradient_text_color ;
 * Shortcode class
 * @var $this WPBakeryShortCode_VC_Btn
 */
$style = $shape = $color = $size = $custom_background = $custom_text = $align = $link = $title = $button_block = $el_class = $outline_custom_color = $outline_custom_hover_background = $outline_custom_hover_text = $add_icon = $i_align = $i_type = $i_icon_entypo = $i_icon_fontawesome = $i_icon_linecons = $i_icon_pixelicons = $i_icon_typicons = $css = $css_animation = '';
$gradient_color_1 = $gradient_color_2 = $gradient_custom_color_1 = $gradient_custom_color_2 = $gradient_text_color = '';
$custom_onclick = $custom_onclick_code = '';
$a_href = $a_title = $a_target = $a_rel = '';
$styles = array();
$icon_wrapper = false;
$icon_html = false;
$attributes = array();

$atts = vc_map_get_attributes( $this->getShortcode(), $atts );
extract( $atts );
//parse link
$link = ( '||' === $link ) ? '' : $link;
$link = vc_build_link( $link );
$use_link = false;
if ( strlen( $link['url'] ) > 0 ) {
	$use_link = true;
	$a_href = $link['url'];
	$a_href = apply_filters( 'vc_btn_a_href', $a_href );
	$a_title = $link['title'];
	$a_title = apply_filters( 'vc_btn_a_title', $a_title );
	$a_target = $link['target'];
	$a_rel = $link['rel'];
}

$wrapper_classes = array(
	'vc_btn3-container',
	$this->getExtraClass( $el_class ),
	$this->getCSSAnimation( $css_animation ),
	'vc_btn3-' . $align,
);

$button_classes = array(
	'vc_general',
	'vc_btn3',
	'vc_btn3-size-' . $size,
	'vc_btn3-shape-' . $shape,
	'vc_btn3-style-' . $style,
);

$button_html = $title;

if ( '' === trim( $title ) ) {
	$button_classes[] = 'vc_btn3-o-empty';
	$button_html = '<span class="vc_btn3-placeholder">&nbsp;</span>';
}
if ( 'true' === $button_block && 'inline' !== $align ) {
	$button_classes[] = 'vc_btn3-block';
}
if ( 'true' === $add_icon ) {
	$button_classes[] = 'vc_btn3-icon-' . $i_align;
	vc_icon_element_fonts_enqueue( $i_type );

if ( isset( ${'i_icon_' . $i_type} ) ) {
		if ( 'pixelicons' === $i_type ) {
			$icon_wrapper = true;
		}
		$icon_class = ${'i_icon_' . $i_type};
	} else {
		$icon_class = 'fa fa-adjust';
	}

if ( $icon_wrapper ) {
		$icon_html = '<i class="vc_btn3-icon"><span class="vc_btn3-icon-inner ' . esc_attr( $icon_class ) . '"></span></i>';
	} else {
		$icon_html = '<i class="vc_btn3-icon ' . esc_attr( $icon_class ) . '"></i>';
	}

if ( 'left' === $i_align ) {
		$button_html = $icon_html . ' ' . $button_html;
	} else {
		$button_html .= ' ' . $icon_html;
	}
}

if ( 'custom' === $style ) {
	if ( $custom_background ) {
		$styles[] = vc_get_css_color( 'background-color', $custom_background );
	}

if ( $custom_text ) {
		$styles[] = vc_get_css_color( 'color', $custom_text );
	}

if ( ! $custom_background && ! $custom_text ) {
		$button_classes[] = 'vc_btn3-color-grey';
	}
} elseif ( 'outline-custom' === $style ) {
	if ( $outline_custom_color ) {
		$styles[] = vc_get_css_color( 'border-color', $outline_custom_color );
		$styles[] = vc_get_css_color( 'color', $outline_custom_color );
		$attributes[] = 'onmouseleave="this.style.borderColor=\'' . $outline_custom_color . '\'; this.style.backgroundColor=\'transparent\'; this.style.color=\'' . $outline_custom_color . '\'"';
	} else {
		$attributes[] = 'onmouseleave="this.style.borderColor=\'\'; this.style.backgroundColor=\'transparent\'; this.style.color=\'\'"';
	}

$onmouseenter = array();
	if ( $outline_custom_hover_background ) {
		$onmouseenter[] = 'this.style.borderColor=\'' . $outline_custom_hover_background . '\';';
		$onmouseenter[] = 'this.style.backgroundColor=\'' . $outline_custom_hover_background . '\';';
	}
	if ( $outline_custom_hover_text ) {
		$onmouseenter[] = 'this.style.color=\'' . $outline_custom_hover_text . '\';';
	}
	if ( $onmouseenter ) {
		$attributes[] = 'onmouseenter="' . implode( ' ', $onmouseenter ) . '"';
	}

if ( ! $outline_custom_color && ! $outline_custom_hover_background && ! $outline_custom_hover_text ) {
		$button_classes[] = 'vc_btn3-color-inverse';

foreach ( $button_classes as $k => $v ) {
			if ( 'vc_btn3-style-outline-custom' === $v ) {
				unset( $button_classes[ $k ] );
				break;
			}
		}
		$button_classes[] = 'vc_btn3-style-outline';
	}
} elseif ( 'gradient' === $style || 'gradient-custom' === $style ) {

$gradient_color_1 = vc_convert_vc_color( $gradient_color_1 );
	$gradient_color_2 = vc_convert_vc_color( $gradient_color_2 );

$button_text_color = '#fff';
	if ( 'gradient-custom' === $style ) {
		$gradient_color_1 = $gradient_custom_color_1;
		$gradient_color_2 = $gradient_custom_color_2;
		$button_text_color = $gradient_text_color;
	}

$gradient_css = array();
	$gradient_css[] = 'color: ' . $button_text_color;
	$gradient_css[] = 'border: none';
	$gradient_css[] = 'background-color: ' . $gradient_color_1;
	$gradient_css[] = 'background-image: -webkit-linear-gradient(left, ' . $gradient_color_1 . ' 0%, ' . $gradient_color_2 . ' 50%,' . $gradient_color_1 . ' 100%)';
	$gradient_css[] = 'background-image: linear-gradient(to right, ' . $gradient_color_1 . ' 0%, ' . $gradient_color_2 . ' 50%,' . $gradient_color_1 . ' 100%)';
	$gradient_css[] = '-webkit-transition: all .2s ease-in-out';
	$gradient_css[] = 'transition: all .2s ease-in-out';
	$gradient_css[] = 'background-size: 200% 100%';

// hover css
	$gradient_css_hover = array();
	$gradient_css_hover[] = 'color: ' . $button_text_color;
	$gradient_css_hover[] = 'background-color: ' . $gradient_color_2;
	$gradient_css_hover[] = 'border: none';
	$gradient_css_hover[] = 'background-position: 100% 0';

$uid = uniqid();
	echo '<style type="text/css">.vc_btn3-style-' . $style . '.vc_btn-gradient-btn-' . $uid . ':hover{' . implode( ';', $gradient_css_hover ) . ';' . '}</style>';
	echo '<style type="text/css">.vc_btn3-style-' . $style . '.vc_btn-gradient-btn-' . $uid . '{' . implode( ';', $gradient_css ) . ';' . '}</style>';
	$button_classes[] = 'vc_btn-gradient-btn-' . $uid;
	$attributes[] = 'data-vc-gradient-1="' . $gradient_color_1 . '"';
	$attributes[] = 'data-vc-gradient-2="' . $gradient_color_2 . '"';
} else {
	$button_classes[] = 'vc_btn3-color-' . $color;
}

if ( $styles ) {
	$attributes[] = 'style="' . implode( ' ', $styles ) . '"';
}

$class_to_filter = implode( ' ', array_filter( $wrapper_classes ) );
$class_to_filter .= vc_shortcode_custom_css_class( $css, ' ' );
$css_class = apply_filters( VC_SHORTCODE_CUSTOM_CSS_FILTER_TAG, $class_to_filter, $this->settings['base'], $atts );

if ( $button_classes ) {
	$button_classes = esc_attr( apply_filters( VC_SHORTCODE_CUSTOM_CSS_FILTER_TAG, implode( ' ', array_filter( $button_classes ) ), $this->settings['base'], $atts ) );
	$attributes[] = 'class="' . trim( $button_classes ) . '"';
}

if ( $use_link ) {
	$attributes[] = 'href="' . trim( $a_href ) . '"';
	$attributes[] = 'title="' . esc_attr( trim( $a_title ) ) . '"';
	if ( ! empty( $a_target ) ) {
		$attributes[] = 'target="' . esc_attr( trim( $a_target ) ) . '"';
	}
	if ( ! empty( $a_rel ) ) {
		$attributes[] = 'rel="' . esc_attr( trim( $a_rel ) ) . '"';
	}
}

if ( ! empty( $custom_onclick ) && $custom_onclick_code ) {
	$attributes[] = 'onclick="' . esc_attr( $custom_onclick_code ) . '"';
}

$attributes = implode( ' ', $attributes );
$wrapper_attributes = array();
if ( ! empty( $el_id ) ) {
	$wrapper_attributes[] = 'id="' . esc_attr( $el_id ) . '"';
}
?>
<div class="<?php echo trim( esc_attr( $css_class ) ) ?>" <?php echo implode( ' ', $wrapper_attributes ); ?>>
	<?php
	if ( $use_link ) {
		echo '<a ' . $attributes . '>' . $button_html . '</a>';
	} else {
		echo '<button ' . $attributes . '>' . $button_html . '</button>';
	}
	?></div>

MR SKB