Bug 974430 - Put the |input[type=number]| rule in forms.css into a separate sheet so we can make it respect the dom.forms.number pref. r=dbaron

--HG--
extra : rebase_source : 450ffd1ca743868d75dda6ce0f89078216934e79

layout/base/nsDocumentViewer.cpp

@@ -2225,6 +2225,11 @@ nsDocumentViewer::CreateStyleSet(nsIDocument* aDocument,
     }
   }
 
+  sheet = nsLayoutStylesheetCache::NumberControlSheet();
+  if (sheet) {
+    styleSet->PrependStyleSheet(nsStyleSet::eAgentSheet, sheet);
+  }
+
   sheet = nsLayoutStylesheetCache::FormsSheet();
   if (sheet) {
     styleSet->PrependStyleSheet(nsStyleSet::eAgentSheet, sheet);

layout/style/forms.css

@@ -901,13 +901,9 @@ input[type=range]::-moz-range-thumb {
   -moz-user-select: none ! important;
 }
 
-input[type="number"] {
-  -moz-appearance: number-input;
-  /* Has to revert some properties applied by the generic input rule. */
-  -moz-binding: none;
-  width: 149px; /* to match type=text */
-  overflow-clip-box: content-box;
-}
+/* As a temporary workaround until bug 677302 the rule for input[type=number]
+ * has moved to number-control.css
+ */
 
 input[type=number]::-moz-number-wrapper {
   /* Prevent styling that would change the type of frame we construct. */

layout/style/jar.mn

@@ -10,6 +10,7 @@ toolkit.jar:
    res/plaintext.css     (plaintext.css)
    res/viewsource.css    (viewsource.css)
 *  res/forms.css    (forms.css)
+   res/number-control.css    (number-control.css)
    res/arrow.gif    (arrow.gif)
    res/arrowd.gif   (arrowd.gif)
 

layout/style/nsLayoutStylesheetCache.cpp

@@ -8,6 +8,7 @@
 
 #include "nsAppDirectoryServiceDefs.h"
 #include "mozilla/MemoryReporting.h"
+#include "mozilla/Preferences.h"
 #include "mozilla/css/Loader.h"
 #include "nsIFile.h"
 #include "nsNetUtil.h"
@@ -16,6 +17,12 @@
 #include "nsIXULRuntime.h"
 #include "nsCSSStyleSheet.h"
 
+using namespace mozilla;
+
+static bool sNumberControlEnabled;
+
+#define NUMBER_CONTROL_PREF "dom.forms.number"
+
 NS_IMPL_ISUPPORTS2(
   nsLayoutStylesheetCache, nsIObserver, nsIMemoryReporter)
 
@@ -35,6 +42,7 @@ nsLayoutStylesheetCache::Observe(nsISupports* aSubject,
            strcmp(aTopic, "chrome-flush-caches") == 0) {
     mScrollbarsSheet = nullptr;
     mFormsSheet = nullptr;
+    mNumberControlSheet = nullptr;
   }
   else {
     NS_NOTREACHED("Unexpected observer topic.");
@@ -85,6 +93,31 @@ nsLayoutStylesheetCache::FormsSheet()
   return gStyleCache->mFormsSheet;
 }
 
+nsCSSStyleSheet*
+nsLayoutStylesheetCache::NumberControlSheet()
+{
+  EnsureGlobal();
+  if (!gStyleCache)
+    return nullptr;
+
+  if (!sNumberControlEnabled) {
+    return nullptr;
+  }
+
+  if (!gStyleCache->mNumberControlSheet) {
+    nsCOMPtr<nsIURI> sheetURI;
+    NS_NewURI(getter_AddRefs(sheetURI),
+              NS_LITERAL_CSTRING("resource://gre-resources/number-control.css"));
+
+    if (sheetURI)
+      LoadSheet(sheetURI, gStyleCache->mNumberControlSheet, false);
+
+    NS_ASSERTION(gStyleCache->mNumberControlSheet, "Could not load number-control.css");
+  }
+
+  return gStyleCache->mNumberControlSheet;
+}
+
 nsCSSStyleSheet*
 nsLayoutStylesheetCache::UserContentSheet()
 {
@@ -164,6 +197,7 @@ nsLayoutStylesheetCache::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf
 
   MEASURE(mScrollbarsSheet);
   MEASURE(mFormsSheet);
+  MEASURE(mNumberControlSheet);
   MEASURE(mUserContentSheet);
   MEASURE(mUserChromeSheet);
   MEASURE(mUASheet);
@@ -237,6 +271,9 @@ nsLayoutStylesheetCache::EnsureGlobal()
   NS_ADDREF(gStyleCache);
 
   gStyleCache->InitMemoryReporter();
+
+  Preferences::AddBoolVarCache(&sNumberControlEnabled, NUMBER_CONTROL_PREF,
+                               true);
 }
 
 void

layout/style/nsLayoutStylesheetCache.h

@@ -33,6 +33,9 @@ class nsLayoutStylesheetCache MOZ_FINAL
 
   static nsCSSStyleSheet* ScrollbarsSheet();
   static nsCSSStyleSheet* FormsSheet();
+  // This function is expected to return nullptr when the dom.forms.number
+  // pref is disabled.
+  static nsCSSStyleSheet* NumberControlSheet();
   static nsCSSStyleSheet* UserContentSheet();
   static nsCSSStyleSheet* UserChromeSheet();
   static nsCSSStyleSheet* UASheet();
@@ -58,6 +61,7 @@ private:
   static mozilla::css::Loader* gCSSLoader;
   nsRefPtr<nsCSSStyleSheet> mScrollbarsSheet;
   nsRefPtr<nsCSSStyleSheet> mFormsSheet;
+  nsRefPtr<nsCSSStyleSheet> mNumberControlSheet;
   nsRefPtr<nsCSSStyleSheet> mUserContentSheet;
   nsRefPtr<nsCSSStyleSheet> mUserChromeSheet;
   nsRefPtr<nsCSSStyleSheet> mUASheet;

layout/style/number-control.css

@@ -0,0 +1,17 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* This file exists purely because we need the styling for input[type=number]
+ * to apply only if the pref dom.forms.number is true. Once bug 677302 is
+ * fixed this rule can move back to forms.css.
+ */
+
+input[type="number"] {
+  -moz-appearance: number-input;
+  /* Has to revert some properties applied by the generic input rule. */
+  -moz-binding: none;
+  width: 149px; /* to match type=text */
+  overflow-clip-box: content-box;
+}
+