- Restore original file permissions after patching a file (issue #387).

- Add the ability to selectively apply patches based on the presence of an environment variable (issue #388).
- Add a patch to disable scrollbar bounce and scrollbar overlay on Lion based on the presence of the CEF_SPI_BUILD environment variable (issue #364).

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@339 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

patch/patch.cfg

@@ -1,12 +1,30 @@
-# An element of this array associates a patch file with a target directory.
-# All paths in the patch file must be relative to that directory. Each patch
-# file entry for source code changes should be proceeded by the code review
-# or bug report link that it relates to.
-patches = {
-  # http://codereview.chromium.org/8086022/
-  'build' : '../build/',
-  # http://codereview.chromium.org/6730028/
-  'base' : '../base/',
-  # http://code.google.com/p/gyp/issues/detail?id=223
-  'tools_gyp' : '../tools/gyp/',
-}
+# Each map in the list associates a patch file name with a target path and
+# optional condition. All paths in the patch file must be relative to the
+# target path. Each map should include a comment linking to the code review
+# or bug report that the patch relates to. If a condition is provided the
+# patch will only be applied if an environment variable with the specified
+# name exists.
+
+patches = [
+  {
+    # http://codereview.chromium.org/8086022/
+    'name': 'build',
+    'path': '../build/',
+  },
+  {
+    # http://codereview.chromium.org/6730028/
+    'name': 'base',
+    'path': '../base/',
+  },
+  {
+    # http://code.google.com/p/gyp/issues/detail?id=223
+    'name': 'tools_gyp',
+    'path': '../tools/gyp/',
+  },
+  {
+    # http://code.google.com/p/chromiumembedded/issues/detail?id=364
+    'name': 'spi_webcore_364',
+    'path': '../third_party/WebKit/Source/WebCore/',
+    'condition': 'CEF_SPI_BUILD',
+  },
+]

patch/patches/spi_webcore_364.patch

@@ -0,0 +1,35 @@
+Index: page/FrameView.cpp
+===================================================================
+--- page/FrameView.cpp	(revision 97950)
++++ page/FrameView.cpp	(working copy)
+@@ -152,10 +152,12 @@
+             m_page = page;
+             m_page->addScrollableArea(this);
+ 
++#if 0
+             if (m_frame == m_page->mainFrame()) {
+                 ScrollableArea::setVerticalScrollElasticity(ScrollElasticityAllowed);
+                 ScrollableArea::setHorizontalScrollElasticity(ScrollElasticityAllowed);
+             }
++#endif
+         }
+     }
+ }
+Index: platform/chromium/ScrollbarOverlayUtilitiesChromiumMac.mm
+===================================================================
+--- platform/chromium/ScrollbarOverlayUtilitiesChromiumMac.mm	(revision 97950)
++++ platform/chromium/ScrollbarOverlayUtilitiesChromiumMac.mm	(working copy)
+@@ -356,9 +356,13 @@
+ 
+ bool isScrollbarOverlayAPIAvailable()
+ {
++#if 0
+     static bool apiAvailable = [lookUpNSScrollerImpClass() respondsToSelector:@selector(scrollerImpWithStyle:controlSize:horizontal:replacingScrollerImp:)] &&
+                                [lookUpNSScrollerImpPairClass() instancesRespondToSelector:@selector(scrollerStyle)];
+     return apiAvailable;
++#else
++    return false;
++#endif
+ }
+ 
+ #endif // USE(WK_SCROLLBAR_PAINTER)

tools/patch_util.py

@@ -20,7 +20,9 @@ __version__ = "8.12-1"
 
 import copy
 import logging
+import os
 import re
+from stat import *
 # cStringIO doesn't support unicode in 2.5
 from StringIO import StringIO
 from logging import debug, info, warning
@@ -500,6 +502,9 @@ def patch_stream(instream, hunks):
 
 
 def patch_hunks(srcname, tgtname, hunks):
+  # get the current file mode
+  mode = os.stat(srcname)[ST_MODE]
+
   src = open(srcname, "rb")
   tgt = open(tgtname, "wb")
 
@@ -509,6 +514,10 @@ def patch_hunks(srcname, tgtname, hunks):
 
   tgt.close()
   src.close()
+
+  # restore the file mode
+  os.chmod(tgtname, mode)
+
   return True
  
 

tools/patcher.py

@@ -4,7 +4,7 @@
 
 import pickle
 from optparse import OptionParser
-import os.path
+import os
 import sys
 from file_util import *
 from patch_util import *
@@ -51,15 +51,24 @@ else:
     execfile(options.patchconfig, scope)
     patches = scope["patches"]
     
-    for name in patches.keys():
-        file = patchdir+'patches/'+name+'.patch'
-        if not os.path.isfile(file):
-            sys.stderr.write('Patch file '+file+' does not exist.\n')
-        else:
-            sys.stderr.write('Reading patch file '+file+'\n')
-            dir = patches[name]
-            patchObj = from_file(file)
-            patchObj.apply(dir)
+    for patch in patches:
+        file = patchdir+'patches/'+patch['name']+'.patch'
+        dopatch = True
+
+        if 'condition' in patch:
+          # Check that the environment variable is set.
+          if patch['condition'] not in os.environ:
+            sys.stderr.write('Skipping patch file '+file+'\n')
+            dopatch = False
+
+        if dopatch:
+          if not os.path.isfile(file):
+              sys.stderr.write('Patch file '+file+' does not exist.\n')
+          else:
+              sys.stderr.write('Reading patch file '+file+'\n')
+              dir = patch['path']
+              patchObj = from_file(file)
+              patchObj.apply(dir)
 
 # read the current include file, if any
 incfile = patchdir + 'patch_state.h'