Add hasLeadingNewline attribute to InlineHTML

Use this attribute to not print an extra newline if the original
code did not have it.

Author: nikic

CHANGELOG.md

@@ -1,7 +1,10 @@
 Version 3.0.0-dev
 -----------------
 
-Nothing yet.
+### Added
+
+* The `InlineHTML` node now has an `hasLeadingNewline` attribute, that specifies whether the
+  preceding closing tag contained a newline. The pretty printer honors this attribute.
 
 Version 3.0.0-alpha1 (2016-07-25)
 ---------------------------------

lib/PhpParser/Lexer.php

@@ -12,6 +12,7 @@ class Lexer
     protected $pos;
     protected $line;
     protected $filePos;
+    protected $prevCloseTagHasNewline;
 
     protected $tokenMap;
     protected $dropTokens;
@@ -67,6 +68,10 @@ public function startLexing($code) {
         $this->pos  = -1;
         $this->line =  1;
         $this->filePos = 0;
+
+        // If inline HTML occurs without preceding code, treat it as if it had a leading newline.
+        // This ensures proper composability, because having a newline is the "safe" assumption.
+        $this->prevCloseTagHasNewline = true;
     }
 
     protected function resetErrors() {
@@ -166,6 +171,11 @@ public function getNextToken(&$value = null, &$startAttributes = null, &$endAttr
             } elseif (!isset($this->dropTokens[$token[0]])) {
                 $value = $token[1];
                 $id = $this->tokenMap[$token[0]];
+                if (T_CLOSE_TAG === $token[0]) {
+                    $this->prevCloseTagHasNewline = false !== strpos($token[1], "\n");
+                } else if (T_INLINE_HTML === $token[0]) {
+                    $startAttributes['hasLeadingNewline'] = $this->prevCloseTagHasNewline;
+                }
 
                 $this->line += substr_count($value, "\n");
                 $this->filePos += \strlen($value);

lib/PhpParser/PrettyPrinter/Standard.php

@@ -789,7 +789,8 @@ protected function pStmt_Unset(Stmt\Unset_ $node) {
     }
 
     protected function pStmt_InlineHTML(Stmt\InlineHTML $node) {
-        return '?>' . $this->pNoIndent("\n" . $node->value) . '<?php ';
+        $newline = $node->getAttribute('hasLeadingNewline', true) ? "\n" : '';
+        return '?>' . $this->pNoIndent($newline . $node->value) . '<?php ';
     }
 
     protected function pStmt_HaltCompiler(Stmt\HaltCompiler $node) {

test/PhpParser/LexerTest.php

@@ -72,7 +72,8 @@ public function provideTestLex() {
                     ),
                     array(
                         Tokens::T_INLINE_HTML, 'plaintext',
-                        array('startLine' => 1), array('endLine' => 1)
+                        array('startLine' => 1, 'hasLeadingNewline' => false),
+                        array('endLine' => 1)
                     ),
                 )
             ),

test/PhpParser/ParserTest.php

@@ -110,9 +110,9 @@ public function testInvalidToken() {
     }
 
     /**
-     * @dataProvider provideTestKindAttributes
+     * @dataProvider provideTestExtraAttributes
      */
-    public function testKindAttributes($code, $expectedAttributes) {
+    public function testExtraAttributes($code, $expectedAttributes) {
         $parser = $this->getParser(new Lexer);
         $stmts = $parser->parse("<?php $code;");
         $attributes = $stmts[0]->getAttributes();
@@ -121,7 +121,7 @@ public function testKindAttributes($code, $expectedAttributes) {
         }
     }
 
-    public function provideTestKindAttributes() {
+    public function provideTestExtraAttributes() {
         return array(
             array('0', ['kind' => Scalar\LNumber::KIND_DEC]),
             array('9', ['kind' => Scalar\LNumber::KIND_DEC]),
@@ -158,6 +158,8 @@ public function provideTestKindAttributes() {
             array("die('done')", ['kind' => Expr\Exit_::KIND_DIE]),
             array("exit", ['kind' => Expr\Exit_::KIND_EXIT]),
             array("exit(1)", ['kind' => Expr\Exit_::KIND_EXIT]),
+            array("?>Foo", ['hasLeadingNewline' => false]),
+            array("?>\nFoo", ['hasLeadingNewline' => true]),
         );
     }
 }

test/code/prettyPrinter/inlineHTMLandPHPtest.file-test

@@ -49,4 +49,10 @@ HTML
 <?php
 echo 'PHP';
 ?>
-HTML
+HTML
+-----
+HTML<?php echo 'PHP'; ?>HTML
+-----
+HTML<?php
+echo 'PHP';
+?>HTML

test/code/prettyPrinter/onlyInlineHTML.file-test

@@ -8,4 +8,12 @@ World Hallo
 Hallo World
 Foo Bar
 Bar Foo
-World Hallo
+World Hallo
+-----
+
+
+Test
+-----
+
+
+Test