X-Git-Url: https://jasonwoof.com/gitweb/?a=blobdiff_plain;f=template.php;h=3845c7c9bf9ec61b1b28829bfc30f4053f2d7035;hb=e99321a886b30fc6d601c7065384bfe2a6d34bc4;hp=44db726bf9eb75949d05fb385c41e19f62d5e1b2;hpb=f22aa9e82ee43e5d390bcb5ab076b24a93e8fda2;p=wfpl.git

diff --git a/template.php b/template.php
index 44db726..3845c7c 100644
--- a/template.php
+++ b/template.php
@@ -57,15 +57,14 @@ function parse_template_file($filename) {
 	return parse_template(file_get_contents($filename));
 }
 
-# We parse the template string into a tree of strings and sub-templates.  
+# We parse the template string into a tree of strings and sub-templates.
 # A template is a hash with a name string, a pieces array, and possibly 
 # an args array.
 
 function parse_template($string) {
 	$tem =& tem_push();
 	$tem['pieces'] = array();
-	# note: for some reason this captures '<!--' but not '-->'.
-	$matches = preg_split("/(<!--)?(~[^~]*~)(?(1)-->)/", $string, -1, PREG_SPLIT_DELIM_CAPTURE);
+	$matches = preg_split('/(<!--)?(~[^~]*~)(?(1)-->)/', preg_replace('/<!--(~[^~]*~)-->/', '$1', $string), -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
 	foreach($matches as $match) {
 		if($match == '~~') $match = '~';
 		if(substr($match,0,1) == '~' and strlen($match) > 2) {
@@ -85,13 +84,13 @@ function parse_template($string) {
 				array_pop($args);  # drop '}'
 				$cur = $tem['name'];
 				if($name && $name != $cur) {
-				   	die("Invalid template: tried to close '$name', but '$cur' is current.");
+					die("Invalid template: tried to close '$name', but '$cur' is current.");
 				}
 				$tem =& $tem['parent'];
 			} else {  # value slot
 				$tem['pieces'][] = array('name' => $name, 'args' => $args);
 			}
-		} elseif($match and $match != '<!--') {  # static string
+		} else {  # static string
 			$tem['pieces'][] = $match;
 		}
 	}
@@ -209,7 +208,7 @@ function &tem_row_data($tem, $context)
 	if(count($tem['args'])) {
 		$auto_func = "tem_auto_" . $tem['args'][0];
 		function_exists($auto_func)
-		   	or die("ERROR: template auto function '$auto_func' not found.<br>\n");
+			or die("ERROR: template auto function '$auto_func' not found.<br>\n");
 	}
 	if($auto_func) $value = $auto_func($scope['data'][$key], $key, $scope);
 	else $value = $scope['data'][$key];
@@ -234,38 +233,53 @@ 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'.");
 	$subs = array();
 	foreach($tem['pieces'] as $piece) {
 		if($is_sub($piece)) {
-		   	$subs[$piece['name']] = $piece;
+			$subs[$piece['name']] = $piece;
 		}
 	}
 	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
@@ -286,7 +300,21 @@ function merge_templates($main, $tem) {
 function tem_auto_sep(&$value, $key, $context) {
 	$rows =& $context['parent']['parent'];
 	if($rows['cur'] != count($rows['rows'])-1)  # last row?
-	   	return $value = true;  # show once
+		return $value = true;  # show once
+}
+
+# auto-show once, only when this is the first row of the parent
+function tem_auto_last(&$value, $key, $context) {
+	$rows =& $context['parent']['parent'];
+	if($rows['cur'] == count($rows['rows'])-1)  # last row?
+		return $value = true;  # show once
+}
+
+# auto-show once, only when this is the last row of the parent
+function tem_auto_first(&$value, $key, $context) {
+	$rows =& $context['parent']['parent'];
+	if($rows['cur'] == 0)  # first row?
+		return $value = true;  # show once
 }
 
 # 'show' sections will be shown unless the corresponding data value
@@ -359,7 +387,7 @@ class tem {
 	function tem() {
 		$this->template = array('pieces' => array());
 		$this->data = array();
-   	}
+	}
 	
 	function set($key, $value) {
 		$this->data[$key] = $value;
@@ -429,7 +457,14 @@ 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($is_sub = 'is_sub_template') {
@@ -497,6 +532,16 @@ function tem_load($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);