X-Git-Url: https://jasonwoof.com/gitweb/?a=blobdiff_plain;f=template.php;h=396819d20d4ad2db754eaa5815690d66c45c5754;hb=bd1f2c2ee4f8edf6139b811ec3fe746700409723;hp=45857afcecde5532be9c7651ac7a7bbb552bf29a;hpb=ece89d7b32c6eb58bf3704ea360b9b292c551c7f;p=wfpl.git

diff --git a/template.php b/template.php
index 45857af..396819d 100644
--- a/template.php
+++ b/template.php
@@ -53,7 +53,7 @@ function template_file($filename, $data) {
 	return fill_template(parse_template_file($filename), $data);
 }
 
-function parse_template_file($filename) {
+function &parse_template_file($filename) {
 	return parse_template(file_get_contents($filename));
 }
 
@@ -61,7 +61,7 @@ function parse_template_file($filename) {
 # A template is a hash with a name string, a pieces array, and possibly 
 # an args array.
 
-function parse_template($string) {
+function &parse_template($string) {
 	$tem =& tem_push();
 	$tem['pieces'] = array();
 	$matches = preg_split('/(<!--)?(~[^~]*~)(?(1)-->)/', preg_replace('/<!--(~[^~]*~)-->/', '$1', $string), -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
@@ -163,7 +163,7 @@ function tem_data_as_rows($value) {
 		if(array_key_exists(0, $value)) return $value;
 		# key/value pairs -- expand sub-template once.
 		else return array($value);
-	} elseif($value) {
+	} elseif($value || $value === 0 || $value === '0' || $value === '') {
 		# value -- expand sub-template once using only parent values
 		return array(array());
 	} else {
@@ -233,10 +233,14 @@ function tem_encoded_data($tag, $context)
 }
 
 
-function is_sub_template($piece) {
+function is_sub_template(&$piece) {
 	return is_array($piece) and $piece['pieces'];
 }
 
+function is_value_slot(&$piece) {
+	return is_array($piece) and !$piece['pieces'];
+}
+
 # Return a hash containing the top-level sub-templates of tem.
 function top_sub_templates($tem, $is_sub = 'is_sub_template') {
 	function_exists($is_sub) or die("no such function '$is_sub'.");
@@ -249,22 +253,33 @@ function top_sub_templates($tem, $is_sub = 'is_sub_template') {
 	return $subs;
 }
 
-# Replace top-level values in $main with top-level templates from $tem.
-function merge_templates($main, $tem) {
-	$out = array('name' => $main['name'], 'pieces' => array());
-
-	$subs = top_sub_templates($tem);
-
-	foreach($main['pieces'] as $piece) {
-		$sub = $subs[$piece['name']];
-		if(is_array($piece) and !$piece['pieces'] and $sub and $sub['args'][0] != 'hide') {
-			$piece = $subs[$piece['name']];
+# merge $subs (sub_templates) into variables in $main (template)
+function merge_sub_templates(&$main, &$subs) {
+	foreach($main['pieces'] as &$piece) {
+		if(is_array($piece)) { # not just text
+			if($piece['pieces']) {
+				# a sub-template in main
+				merge_sub_templates($piece, $subs);
+			} else {
+				# a value-slot in main
+				$sub = $subs[$piece['name']];
+				if($sub and $sub['args'][0] != 'hide') {
+					$piece = $subs[$piece['name']];
+					$piece['parent'] =& $main;
+				}
+			}
 		}
-		$out['pieces'][] = $piece;
 	}
 	return $out;
 }
 
+# Replace values in $main with top-level templates from $tem.
+function merge_templates(&$main, &$tem) {
+	$subs = top_sub_templates($tem);
+
+	merge_sub_templates($main, $subs);
+}
+
 
 
 # tem_auto functions
@@ -302,11 +317,19 @@ function tem_auto_first(&$value, $key, $context) {
 		return $value = true;  # show once
 }
 
-# 'show' sections will be shown unless the corresponding data value
-# is false (only false, not 0 or '' or array()).
+# 'show' sections will be shown unless the corresponding data
+# value === false
 
 function tem_auto_show(&$value) {
-	if($value !== false) $value = array(array());
+	if($value === null) $value = array(array());
+	return $value;
+}
+
+# 'nonempty' sections will not be shown if the corresponding data
+# value is the empty string
+
+function tem_auto_nonempty(&$value) {
+	if($value === '') $value = null;
 	return $value;
 }
 
@@ -409,11 +432,11 @@ class tem {
 	}
 
 	function load_str($str) {
-		$this->template = parse_template($str);
+		$this->template =& parse_template($str);
 	}
 
 	function load($filename) {
-		$this->template = parse_template_file($filename);
+		$this->template =& parse_template_file($filename);
 	}
 
 	function run($tem = false) {
@@ -442,7 +465,14 @@ class tem {
 
 		# merge the data arrays and template trees (new style)
 		$this->data = array_merge($this->data, $tem->data);
-		$this->template = merge_templates($this->template, $tem->template);
+		merge_templates($this->template, $tem->template);
+	}
+
+	# see merge() above
+	function merge_file($filename) {
+		$other_tem = new tem();
+		$other_tem->load($filename);
+		$this->merge($other_tem);
 	}
 
 	function top_sub_names($is_sub = 'is_sub_template') {
@@ -510,6 +540,16 @@ function tem_load($filename) {
 	$GLOBALS['wfpl_template']->load($filename);
 }
 
+function tem_merge($tem) {
+	tem_init();
+	$GLOBALS['wfpl_template']->merge($tem);
+}
+
+function tem_merge_file($filename) {
+	tem_init();
+	$GLOBALS['wfpl_template']->merge_file($filename);
+}
+
 function tem_output($filename = false) {
 	tem_init();
 	$GLOBALS['wfpl_template']->output($filename);