LCOV - code coverage report
Current view: directory - content/base/src - nsStyledElement.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 120 30 25.0 %
Date: 2012-06-02 Functions: 14 5 35.7 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* vim:set tw=80 expandtab softtabstop=2 ts=2 sw=2: */
       3                 : /* ***** BEGIN LICENSE BLOCK *****
       4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       5                 :  *
       6                 :  * The contents of this file are subject to the Mozilla Public License Version
       7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       8                 :  * the License. You may obtain a copy of the License at
       9                 :  * http://www.mozilla.org/MPL/
      10                 :  *
      11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      13                 :  * for the specific language governing rights and limitations under the
      14                 :  * License.
      15                 :  *
      16                 :  * The Original Code is Mozilla Communicator client code.
      17                 :  *
      18                 :  * The Initial Developer of the Original Code is
      19                 :  * Netscape Communications Corporation.
      20                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      21                 :  * the Initial Developer. All Rights Reserved.
      22                 :  *
      23                 :  * Contributor(s):
      24                 :  *   Mats Palmgren <mats.palmgren@bredband.net>
      25                 :  *   Daniel Kraft <d@domob.eu>
      26                 :  *
      27                 :  * Alternatively, the contents of this file may be used under the terms of
      28                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      29                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      30                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      31                 :  * of those above. If you wish to allow use of your version of this file only
      32                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      33                 :  * use your version of this file under the terms of the MPL, indicate your
      34                 :  * decision by deleting the provisions above and replace them with the notice
      35                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      36                 :  * the provisions above, a recipient may use your version of this file under
      37                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      38                 :  *
      39                 :  * ***** END LICENSE BLOCK ***** */
      40                 : 
      41                 : #include "nsStyledElement.h"
      42                 : #include "nsGkAtoms.h"
      43                 : #include "nsAttrValue.h"
      44                 : #include "nsGenericElement.h"
      45                 : #include "nsMutationEvent.h"
      46                 : #include "nsDOMCSSDeclaration.h"
      47                 : #include "nsDOMCSSAttrDeclaration.h"
      48                 : #include "nsServiceManagerUtils.h"
      49                 : #include "nsIDocument.h"
      50                 : #include "mozilla/css/StyleRule.h"
      51                 : #include "nsCSSParser.h"
      52                 : #include "mozilla/css/Loader.h"
      53                 : #include "nsIDOMMutationEvent.h"
      54                 : #include "nsXULElement.h"
      55                 : #include "nsIDOMSVGStylable.h"
      56                 : #include "nsContentUtils.h"
      57                 : 
      58                 : namespace css = mozilla::css;
      59                 : 
      60                 : //----------------------------------------------------------------------
      61                 : // nsIContent methods
      62                 : 
      63                 : nsIAtom*
      64               0 : nsStyledElementNotElementCSSInlineStyle::GetClassAttributeName() const
      65                 : {
      66               0 :   return nsGkAtoms::_class;
      67                 : }
      68                 : 
      69                 : nsIAtom*
      70               0 : nsStyledElementNotElementCSSInlineStyle::GetIDAttributeName() const
      71                 : {
      72               0 :   return nsGkAtoms::id;
      73                 : }
      74                 : 
      75                 : nsIAtom*
      76               0 : nsStyledElementNotElementCSSInlineStyle::DoGetID() const
      77                 : {
      78               0 :   NS_ASSERTION(HasID(), "Unexpected call");
      79                 : 
      80                 :   // The nullcheck here is needed because nsGenericElement::UnsetAttr calls
      81                 :   // out to various code between removing the attribute and we get a chance to
      82                 :   // ClearHasID().
      83                 : 
      84               0 :   const nsAttrValue* attr = mAttrsAndChildren.GetAttr(nsGkAtoms::id);
      85                 : 
      86               0 :   return attr ? attr->GetAtomValue() : nsnull;
      87                 : }
      88                 : 
      89                 : const nsAttrValue*
      90               0 : nsStyledElementNotElementCSSInlineStyle::DoGetClasses() const
      91                 : {
      92               0 :   NS_ASSERTION(HasFlag(NODE_MAY_HAVE_CLASS), "Unexpected call");
      93               0 :   return mAttrsAndChildren.GetAttr(nsGkAtoms::_class);
      94                 : }
      95                 : 
      96                 : bool
      97             195 : nsStyledElementNotElementCSSInlineStyle::ParseAttribute(PRInt32 aNamespaceID,
      98                 :                                                         nsIAtom* aAttribute,
      99                 :                                                         const nsAString& aValue,
     100                 :                                                         nsAttrValue& aResult)
     101                 : {
     102             195 :   if (aNamespaceID == kNameSpaceID_None) {
     103              66 :     if (aAttribute == nsGkAtoms::style) {
     104               0 :       SetMayHaveStyle();
     105               0 :       ParseStyleAttribute(aValue, aResult, false);
     106               0 :       return true;
     107                 :     }
     108              66 :     if (aAttribute == nsGkAtoms::_class) {
     109               0 :       SetFlags(NODE_MAY_HAVE_CLASS);
     110               0 :       aResult.ParseAtomArray(aValue);
     111               0 :       return true;
     112                 :     }
     113              66 :     if (aAttribute == nsGkAtoms::id) {
     114                 :       // Store id as an atom.  id="" means that the element has no id,
     115                 :       // not that it has an emptystring as the id.
     116              10 :       RemoveFromIdTable();
     117              10 :       if (aValue.IsEmpty()) {
     118               0 :         ClearHasID();
     119               0 :         return false;
     120                 :       }
     121              10 :       aResult.ParseAtom(aValue);
     122              10 :       SetHasID();
     123              10 :       AddToIdTable(aResult.GetAtomValue());
     124              10 :       return true;
     125                 :     }
     126                 :   }
     127                 : 
     128                 :   return nsStyledElementBase::ParseAttribute(aNamespaceID, aAttribute, aValue,
     129             185 :                                              aResult);
     130                 : }
     131                 : 
     132                 : nsresult
     133               0 : nsStyledElementNotElementCSSInlineStyle::UnsetAttr(PRInt32 aNameSpaceID,
     134                 :                                                    nsIAtom* aAttribute,
     135                 :                                                    bool aNotify)
     136                 : {
     137               0 :   nsAutoScriptBlocker scriptBlocker;
     138               0 :   if (aAttribute == nsGkAtoms::id && aNameSpaceID == kNameSpaceID_None) {
     139                 :     // Have to do this before clearing flag. See RemoveFromIdTable
     140               0 :     RemoveFromIdTable();
     141                 :   }
     142                 : 
     143               0 :   return nsGenericElement::UnsetAttr(aNameSpaceID, aAttribute, aNotify);
     144                 : }
     145                 : 
     146                 : nsresult
     147             195 : nsStyledElementNotElementCSSInlineStyle::AfterSetAttr(PRInt32 aNamespaceID,
     148                 :                                                       nsIAtom* aAttribute,
     149                 :                                                       const nsAttrValue* aValue,
     150                 :                                                       bool aNotify)
     151                 : {
     152             195 :   if (aNamespaceID == kNameSpaceID_None && !aValue &&
     153                 :       aAttribute == nsGkAtoms::id) {
     154                 :     // The id has been removed when calling UnsetAttr but we kept it because
     155                 :     // the id is used for some layout stuff between UnsetAttr and AfterSetAttr.
     156                 :     // Now. the id is really removed so it would not be safe to keep this flag.
     157               0 :     ClearHasID();
     158                 :   }
     159                 : 
     160                 :   return nsGenericElement::AfterSetAttr(aNamespaceID, aAttribute, aValue,
     161             195 :                                         aNotify);
     162                 : }
     163                 : 
     164                 : NS_IMETHODIMP
     165               0 : nsStyledElementNotElementCSSInlineStyle::SetInlineStyleRule(css::StyleRule* aStyleRule,
     166                 :                                                             bool aNotify)
     167                 : {
     168               0 :   SetMayHaveStyle();
     169               0 :   bool modification = false;
     170               0 :   nsAttrValue oldValue;
     171                 : 
     172                 :   bool hasListeners = aNotify &&
     173                 :     nsContentUtils::HasMutationListeners(this,
     174                 :                                          NS_EVENT_BITS_MUTATION_ATTRMODIFIED,
     175               0 :                                          this);
     176                 : 
     177                 :   // There's no point in comparing the stylerule pointers since we're always
     178                 :   // getting a new stylerule here. And we can't compare the stringvalues of
     179                 :   // the old and the new rules since both will point to the same declaration
     180                 :   // and thus will be the same.
     181               0 :   if (hasListeners) {
     182                 :     // save the old attribute so we can set up the mutation event properly
     183                 :     // XXXbz if the old rule points to the same declaration as the new one,
     184                 :     // this is getting the new attr value, not the old one....
     185               0 :     nsAutoString oldValueStr;
     186                 :     modification = GetAttr(kNameSpaceID_None, nsGkAtoms::style,
     187               0 :                            oldValueStr);
     188               0 :     if (modification) {
     189               0 :       oldValue.SetTo(oldValueStr);
     190                 :     }
     191                 :   }
     192               0 :   else if (aNotify && IsInDoc()) {
     193               0 :     modification = !!mAttrsAndChildren.GetAttr(nsGkAtoms::style);
     194                 :   }
     195                 : 
     196               0 :   nsAttrValue attrValue(aStyleRule, nsnull);
     197                 : 
     198                 :   // XXXbz do we ever end up with ADDITION here?  I doubt it.
     199                 :   PRUint8 modType = modification ?
     200                 :     static_cast<PRUint8>(nsIDOMMutationEvent::MODIFICATION) :
     201               0 :     static_cast<PRUint8>(nsIDOMMutationEvent::ADDITION);
     202                 : 
     203                 :   return SetAttrAndNotify(kNameSpaceID_None, nsGkAtoms::style, nsnull,
     204                 :                           oldValue, attrValue, modType, hasListeners,
     205               0 :                           aNotify, kDontCallAfterSetAttr);
     206                 : }
     207                 : 
     208                 : css::StyleRule*
     209               0 : nsStyledElementNotElementCSSInlineStyle::GetInlineStyleRule()
     210                 : {
     211               0 :   if (!MayHaveStyle()) {
     212               0 :     return nsnull;
     213                 :   }
     214               0 :   const nsAttrValue* attrVal = mAttrsAndChildren.GetAttr(nsGkAtoms::style);
     215                 : 
     216               0 :   if (attrVal && attrVal->Type() == nsAttrValue::eCSSStyleRule) {
     217               0 :     return attrVal->GetCSSStyleRuleValue();
     218                 :   }
     219                 : 
     220               0 :   return nsnull;
     221                 : }
     222                 : 
     223                 : nsresult
     224             934 : nsStyledElementNotElementCSSInlineStyle::BindToTree(nsIDocument* aDocument,
     225                 :                                                     nsIContent* aParent,
     226                 :                                                     nsIContent* aBindingParent,
     227                 :                                                     bool aCompileEventHandlers)
     228                 : {
     229                 :   nsresult rv = nsStyledElementBase::BindToTree(aDocument, aParent,
     230                 :                                                 aBindingParent,
     231             934 :                                                 aCompileEventHandlers);
     232             934 :   NS_ENSURE_SUCCESS(rv, rv);
     233                 : 
     234             934 :   if (aDocument && HasID() && !GetBindingParent()) {
     235              10 :     aDocument->AddToIdTable(this, DoGetID());
     236                 :   }
     237                 : 
     238             934 :   if (!IsXUL()) {
     239                 :     // XXXbz if we already have a style attr parsed, this won't do
     240                 :     // anything... need to fix that.
     241             790 :     ReparseStyleAttribute(false);
     242                 :   }
     243                 : 
     244             934 :   return NS_OK;
     245                 : }
     246                 : 
     247                 : void
     248            1684 : nsStyledElementNotElementCSSInlineStyle::UnbindFromTree(bool aDeep,
     249                 :                                                         bool aNullParent)
     250                 : {
     251            1684 :   RemoveFromIdTable();
     252                 : 
     253            1684 :   nsStyledElementBase::UnbindFromTree(aDeep, aNullParent);
     254            1684 : }
     255                 : 
     256                 : 
     257                 : // ---------------------------------------------------------------
     258                 : // Others and helpers
     259                 : 
     260                 : nsIDOMCSSStyleDeclaration*
     261               0 : nsStyledElementNotElementCSSInlineStyle::GetStyle(nsresult* retval)
     262                 : {
     263               0 :   nsXULElement* xulElement = nsXULElement::FromContent(this);
     264               0 :   if (xulElement) {
     265               0 :     nsresult rv = xulElement->EnsureLocalStyle();
     266               0 :     if (NS_FAILED(rv)) {
     267               0 :       *retval = rv;
     268               0 :       return nsnull;
     269                 :     }
     270                 :   }
     271                 :     
     272               0 :   nsGenericElement::nsDOMSlots *slots = DOMSlots();
     273                 : 
     274               0 :   if (!slots->mStyle) {
     275                 :     // Just in case...
     276               0 :     ReparseStyleAttribute(true);
     277                 : 
     278               0 :     slots->mStyle = new nsDOMCSSAttributeDeclaration(this, false);
     279               0 :     SetMayHaveStyle();
     280                 :   }
     281                 : 
     282               0 :   *retval = NS_OK;
     283               0 :   return slots->mStyle;
     284                 : }
     285                 : 
     286                 : nsresult
     287             790 : nsStyledElementNotElementCSSInlineStyle::ReparseStyleAttribute(bool aForceInDataDoc)
     288                 : {
     289             790 :   if (!MayHaveStyle()) {
     290             790 :     return NS_OK;
     291                 :   }
     292               0 :   const nsAttrValue* oldVal = mAttrsAndChildren.GetAttr(nsGkAtoms::style);
     293                 :   
     294               0 :   if (oldVal && oldVal->Type() != nsAttrValue::eCSSStyleRule) {
     295               0 :     nsAttrValue attrValue;
     296               0 :     nsAutoString stringValue;
     297               0 :     oldVal->ToString(stringValue);
     298               0 :     ParseStyleAttribute(stringValue, attrValue, aForceInDataDoc);
     299                 :     // Don't bother going through SetInlineStyleRule, we don't want to fire off
     300                 :     // mutation events or document notifications anyway
     301               0 :     nsresult rv = mAttrsAndChildren.SetAndTakeAttr(nsGkAtoms::style, attrValue);
     302               0 :     NS_ENSURE_SUCCESS(rv, rv);
     303                 :   }
     304                 :   
     305               0 :   return NS_OK;
     306                 : }
     307                 : 
     308                 : void
     309               0 : nsStyledElementNotElementCSSInlineStyle::ParseStyleAttribute(const nsAString& aValue,
     310                 :                                                              nsAttrValue& aResult,
     311                 :                                                              bool aForceInDataDoc)
     312                 : {
     313               0 :   nsIDocument* doc = OwnerDoc();
     314                 : 
     315               0 :   if (aForceInDataDoc ||
     316               0 :       !doc->IsLoadedAsData() ||
     317               0 :       doc->IsStaticDocument()) {
     318               0 :     bool isCSS = true; // assume CSS until proven otherwise
     319                 : 
     320               0 :     if (!IsInNativeAnonymousSubtree()) {  // native anonymous content
     321                 :                                           // always assumes CSS
     322               0 :       nsAutoString styleType;
     323               0 :       doc->GetHeaderData(nsGkAtoms::headerContentStyleType, styleType);
     324               0 :       if (!styleType.IsEmpty()) {
     325                 :         static const char textCssStr[] = "text/css";
     326               0 :         isCSS = (styleType.EqualsIgnoreCase(textCssStr, sizeof(textCssStr) - 1));
     327                 :       }
     328                 :     }
     329                 : 
     330               0 :     if (isCSS) {
     331               0 :       css::Loader* cssLoader = doc->CSSLoader();
     332               0 :       nsCSSParser cssParser(cssLoader);
     333                 : 
     334               0 :       nsCOMPtr<nsIURI> baseURI = GetBaseURI();
     335                 : 
     336               0 :       nsRefPtr<css::StyleRule> rule;
     337                 :       cssParser.ParseStyleAttribute(aValue, doc->GetDocumentURI(),
     338                 :                                     baseURI,
     339                 :                                     NodePrincipal(),
     340               0 :                                     getter_AddRefs(rule));
     341               0 :       if (rule) {
     342               0 :         aResult.SetTo(rule, &aValue);
     343                 :         return;
     344                 :       }
     345                 :     }
     346                 :   }
     347                 : 
     348               0 :   aResult.SetTo(aValue);
     349                 : }

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