theme-settings: hide custom settings if the scheme overwrites it - fixes https://github.com/rabuzarus/frio/issues/9

Note: this isn't a very beautiful solution since the schema developer have to list all overwriting variables in the schema header. We need a better solution for this.

config.php

@@ -32,6 +32,11 @@ function theme_post(&$a) {
 }
 
 function frio_form(&$a, $arr) {
+	require_once("view/theme/frio/php/schema.php");
+	
+	$scheme_info = get_schema_info($arr["schema"]);
+	$disable = $scheme_info["overwrites"];
+
 	$scheme_choices = array();
 	$scheme_choices["---"] = t("Default");
 	$files = glob('view/theme/frio/schema/*.php');
@@ -52,12 +57,12 @@ function frio_form(&$a, $arr) {
 		'$baseurl'		=> $a->get_baseurl(),
 		'$title'		=> t("Theme settings"),
 		'$schema'		=> array('frio_schema',		t("Select scheme"),			$arr["schema"], '', $scheme_choices),
-		'$nav_bg'		=> array('frio_nav_bg',		t('Navigation bar background color'),	$arr['nav_bg']),
+		'$nav_bg'		=> array_key_exists("nav_bg", $disable) ? "" : array('frio_nav_bg',		t('Navigation bar background color'),	$arr['nav_bg']),
-		'$nav_icon_color'	=> array('frio_nav_icon_color', t('Navigation bar icon color '),	$arr['nav_icon_color']),
+		'$nav_icon_color'	=> array_key_exists("nav_icon_color", $disable) ? "" : array('frio_nav_icon_color', t('Navigation bar icon color '),	$arr['nav_icon_color']),
-		'$link_color'		=> array('frio_link_color',	t('Link color'),			$arr['link_color'],		'', $link_colors),
+		'$link_color'		=> array_key_exists("link_color", $disable) ? "" : array('frio_link_color',	t('Link color'),			$arr['link_color'],		'', $link_colors),
-		'$bgcolor'		=> array('frio_background_color', t('Set the background color'),	$arr['bgcolor']),
+		'$bgcolor'		=> array_key_exists("bgcolor", $disable) ? "" : array('frio_background_color', t('Set the background color'),	$arr['bgcolor']),
-		'$contentbg_transp'	=> array('frio_contentbg_transp', t("Content background transparency"), ($arr["contentbg_transp"] ? $arr["contentbg_transp"] : 0 )),
+		'$contentbg_transp'	=> array_key_exists("contentbg_transp", $disable) ? "" : array('frio_contentbg_transp', t("Content background transparency"), ($arr["contentbg_transp"] ? $arr["contentbg_transp"] : 0 )),
-		'$background_image'	=> array('frio_background_image', t('Set the background image'),	$arr['background_image']),
+		'$background_image'	=> array_key_exists("background_image", $disable ) ? "" : array('frio_background_image', t('Set the background image'),	$arr['background_image']),
 		'$bg_image_options'	=> Image::get_options($arr),
 	));
 

php/schema.php

@@ -0,0 +1,71 @@
+<?php
+
+
+/**
+ * @brief: Get info header of the shema
+ * 
+ * This function parses the header of the shemename.php file for inormations like
+ * Author, Description and Overwrites. Most of the code comes from the get_plugin_info()
+ * function. We use this to get the variables which get overwritten through the shema.
+ * All color variables which get overwritten through the theme have to be
+ * listed (comma seperated) in the shema header under Overwrites:
+ * This seemst not to be the best solution. We need to investigate further.
+ * 
+ * @param string $schema Name of the shema
+ * @return array With theme information
+ *    'author' => Author Name
+ *    'description' => Schema description
+ *    'version' => Schema version
+ *    'overwrites' => Variables which overwriting custom settings
+ */
+function get_schema_info($schema){
+
+	$theme = current_theme();
+	$themepath = "view/theme/" . $theme . "/";
+	$schema = get_pconfig(local_user(),'frio', 'schema');
+
+	$info=Array(
+		'name' => $schema,
+		'description' => "",
+		'author' => array(),
+		'version' => "",
+		'overwrites' => ""
+	);
+
+	if (!is_file($themepath . "schema/" . $schema . ".php")) return $info;
+
+	$f = file_get_contents($themepath . "schema/" . $schema . ".php");
+
+	$r = preg_match("|/\*.*\*/|msU", $f, $m);
+
+	if ($r){
+		$ll = explode("\n", $m[0]);
+		foreach( $ll as $l ) {
+			$l = trim($l,"\t\n\r */");
+			if ($l!=""){
+				list($k,$v) = array_map("trim", explode(":",$l,2));
+				$k= strtolower($k);
+				if ($k=="author"){
+					$r=preg_match("|([^<]+)<([^>]+)>|", $v, $m);
+					if ($r) {
+						$info['author'][] = array('name'=>$m[1], 'link'=>$m[2]);
+					} else {
+						$info['author'][] = array('name'=>$v);
+					}
+				} elseif ($k == "overwrites") {
+					$theme_settings = explode(',',str_replace(' ','', $v));
+					foreach ($theme_settings as $key => $value) {
+						$info["overwrites"][$value] = true;
+					}
+				} else {
+					if (array_key_exists($k,$info)){
+						$info[$k]=$v;
+					}
+				}
+
+			}
+		}
+
+	}
+	return $info;
+}

schema/love-music.php

@@ -1,6 +1,7 @@
 <?php
 	/* Licence: AGP
 	 * Author: rabuzarus
+	 * Overwrites: nav_bg, nav_icon_color, link_color, bgcolor, contentbg_transp, background_image, bg_image_option, link_hover_color
 	 */
 
 	$nav_bg = "#000";

schema/red.php

@@ -1,5 +1,11 @@
 <?php
-
+/*
+ * Name: Red
+ * Author: Rabuzarus
+ * 
+ * List here all variables which will get overwritten through this schema
+ * Overwrites: nav_bg, nav_icon_color, link_color, bgcolor, contentbg_transp
+ */
 
 	$nav_bg = "#870000";
 	$nav_icon_color = "#f5f5f5";

templates/theme_settings.tpl

@@ -4,21 +4,23 @@
 
 {{include file="field_select.tpl" field=$schema}}
 
-{{include file="field_colorinput.tpl" field=$nav_bg}}
+{{if $nav_bg}}{{include file="field_colorinput.tpl" field=$nav_bg}}{{/if}}
-{{include file="field_colorinput.tpl" field=$nav_icon_color}}
+{{if $nav_icon_color}}{{include file="field_colorinput.tpl" field=$nav_icon_color}}{{/if}}
-{{include file="field_colorinput.tpl" field=$link_color}}
+{{if $link_color}}{{include file="field_colorinput.tpl" field=$link_color}}{{/if}}
 
-{{include file="field_colorinput.tpl" field=$bgcolor}}
+{{if $bgcolor}}{{include file="field_colorinput.tpl" field=$bgcolor}}{{/if}}
 
 {{* The slider for the content opacity - We use no template for this since it is only used at this page *}}
+{{if $contentbg_transp}}
 <div class="form-group field input color">
 	<label for="id_{{$contentbg_transp.0}}" id="label_{{$contentbg_transp.0}}">{{$contentbg_transp.1}}</label>
 	<input type="hidden" class="form-control color slider-input" name="{{$contentbg_transp.0}}" id="{{$contentbg_transp.0}}" type="text" value="{{$contentbg_transp.2}}">
 	<span id="help_{{$contentbg_transp.0}}" class="help-block">{{$contentbg_transp.3}}</span>
 	<div id="end_{{$contentbg_transp.0}}" class="field_end"></div>
 </div>
+{{/if}}
 
-{{include file="field_colorinput.tpl" field=$background_image}}
+{{if $background_image}}{{include file="field_colorinput.tpl" field=$background_image}}{{/if}}
 
 <div id="frio_bg_image_options" style="display: none;">
 {{foreach $bg_image_options as $options}}