Move 'theme' parsing out of Extension class

chrome/common/extensions/api/themes/theme_handler.cc

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/common/extensions/api/themes/theme_handler.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "base/utf_string_conversions.h"
+#include "base/values.h"
+#include "chrome/common/extensions/extension_manifest_constants.h"
+#include "chrome/common/extensions/manifest.h"
+
+namespace extensions {
+
+namespace keys = extension_manifest_keys;
+namespace errors = extension_manifest_errors;
+
+namespace {
+
+bool LoadThemeImages(const DictionaryValue* theme_value,
+                     string16* error,
+                     ThemeInfo* theme_info) {
+  const DictionaryValue* images_value = NULL;
+  if (theme_value->GetDictionary(keys::kThemeImages, &images_value)) {
+    // Validate that the images are all strings.
+    for (DictionaryValue::key_iterator iter = images_value->begin_keys();
+         iter != images_value->end_keys(); ++iter) {
+      std::string val;
+      if (!images_value->GetString(*iter, &val)) {
+        *error = ASCIIToUTF16(errors::kInvalidThemeImages);
+        return false;
+      }
+    }
+    theme_info->theme_images_.reset(images_value->DeepCopy());
+  }
+  return true;
+}
+
+bool LoadThemeColors(const DictionaryValue* theme_value,
+                     string16* error,
+                     ThemeInfo* theme_info) {
+  const DictionaryValue* colors_value = NULL;
+  if (theme_value->GetDictionary(keys::kThemeColors, &colors_value)) {
+    // Validate that the colors are RGB or RGBA lists.
+    for (DictionaryValue::key_iterator iter = colors_value->begin_keys();
+         iter != colors_value->end_keys(); ++iter) {
+      const ListValue* color_list = NULL;
+      double alpha = 0.0;
+      int color = 0;
+      // The color must be a list...
+      if (!colors_value->GetListWithoutPathExpansion(*iter, &color_list) ||
+          // ... and either 3 items (RGB) or 4 (RGBA).
+          ((color_list->GetSize() != 3) &&
+           ((color_list->GetSize() != 4) ||
+            // For RGBA, the fourth item must be a real or int alpha value.
+            // Note that GetDouble() can get an integer value.
+            !color_list->GetDouble(3, &alpha))) ||
+          // For both RGB and RGBA, the first three items must be ints (R,G,B).
+          !color_list->GetInteger(0, &color) ||
+          !color_list->GetInteger(1, &color) ||
+          !color_list->GetInteger(2, &color)) {
+        *error = ASCIIToUTF16(errors::kInvalidThemeColors);
+        return false;
+      }
+    }
+    theme_info->theme_colors_.reset(colors_value->DeepCopy());
+  }
+  return true;
+}
+
+bool LoadThemeTints(const DictionaryValue* theme_value,
+                    string16* error,
+                    ThemeInfo* theme_info) {
+  const DictionaryValue* tints_value = NULL;
+  if (!theme_value->GetDictionary(keys::kThemeTints, &tints_value))
+    return true;
+
+  // Validate that the tints are all reals.
+  for (DictionaryValue::key_iterator iter = tints_value->begin_keys();
+       iter != tints_value->end_keys(); ++iter) {
+    const ListValue* tint_list = NULL;
+    double v = 0.0;
+    if (!tints_value->GetListWithoutPathExpansion(*iter, &tint_list) ||
+        tint_list->GetSize() != 3 ||
+        !tint_list->GetDouble(0, &v) ||
+        !tint_list->GetDouble(1, &v) ||
+        !tint_list->GetDouble(2, &v)) {
+      *error = ASCIIToUTF16(errors::kInvalidThemeTints);
+      return false;
+    }
+  }
+  theme_info->theme_tints_.reset(tints_value->DeepCopy());
+  return true;
+}
+
+bool LoadThemeDisplayProperties(const DictionaryValue* theme_value,
+                                string16* error,
+                                ThemeInfo* theme_info) {
+  const DictionaryValue* display_properties_value = NULL;
+  if (theme_value->GetDictionary(keys::kThemeDisplayProperties,
+                                 &display_properties_value)) {
+    theme_info->theme_display_properties_.reset(
+        display_properties_value->DeepCopy());
+  }
+  return true;
+}
+
+const ThemeInfo* GetThemeInfo(const Extension* extension) {
+  return static_cast<ThemeInfo*>(extension->GetManifestData(keys::kTheme));
+}
+
+}  // namespace
+
+ThemeInfo::ThemeInfo() {
+}
+
+ThemeInfo::~ThemeInfo() {
+}
+
+// static
+DictionaryValue* ThemeInfo::GetThemeImages(const Extension* extension) {
+  const ThemeInfo* theme_info = GetThemeInfo(extension);
+  return theme_info ? theme_info->theme_images_.get() : NULL;
+}
+
+// static
+DictionaryValue* ThemeInfo::GetThemeColors(const Extension* extension) {
+  const ThemeInfo* theme_info = GetThemeInfo(extension);
+  return theme_info ? theme_info->theme_colors_.get() : NULL;
+}
+
+// static
+DictionaryValue* ThemeInfo::GetThemeTints(const Extension* extension) {
+  const ThemeInfo* theme_info = GetThemeInfo(extension);
+  return theme_info ? theme_info->theme_tints_.get() : NULL;
+}
+
+// static
+DictionaryValue* ThemeInfo::GetThemeDisplayProperties(
+    const Extension* extension) {
+  const ThemeInfo* theme_info = GetThemeInfo(extension);
+  return theme_info ? theme_info->theme_display_properties_.get() : NULL;
+}
+
+ThemeHandler::ThemeHandler() {
+}
+
+ThemeHandler::~ThemeHandler() {
+}
+
+bool ThemeHandler::Parse(Extension* extension, string16* error) {
+  const DictionaryValue* theme_value = NULL;
+  if (!extension->manifest()->GetDictionary(keys::kTheme, &theme_value)) {
+    *error = ASCIIToUTF16(errors::kInvalidTheme);
+    return false;
+  }
+
+  scoped_ptr<ThemeInfo> theme_info(new ThemeInfo);
+  if (!LoadThemeImages(theme_value, error, theme_info.get()))
+    return false;
+  if (!LoadThemeColors(theme_value, error, theme_info.get()))
+    return false;
+  if (!LoadThemeTints(theme_value, error, theme_info.get()))
+    return false;
+  if (!LoadThemeDisplayProperties(theme_value, error, theme_info.get()))
+    return false;
+
+  extension->SetManifestData(keys::kTheme, theme_info.release());
+  return true;
+}
+
+}  // namespace extensions