The Tor Browser: layout/xul/tree/nsTreeUtils.cpp@925c144e1f1f

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include "nsReadableUtils.h"

     7 #include "nsTreeUtils.h"

     8 #include "ChildIterator.h"

     9 #include "nsCRT.h"

    10 #include "nsIAtom.h"

    11 #include "nsNameSpaceManager.h"

    12 #include "nsGkAtoms.h"

    13 #include "nsINodeInfo.h"

    15 using namespace mozilla;

    17 nsresult

    18 nsTreeUtils::TokenizeProperties(const nsAString& aProperties, AtomArray & aPropertiesArray)

    19 {

    20   nsAString::const_iterator end;

    21   aProperties.EndReading(end);

    23   nsAString::const_iterator iter;

    24   aProperties.BeginReading(iter);

    26   do {

    27     // Skip whitespace

    28     while (iter != end && nsCRT::IsAsciiSpace(*iter))

    29       ++iter;

    31     // If only whitespace, we're done

    32     if (iter == end)

    33       break;

    35     // Note the first non-whitespace character

    36     nsAString::const_iterator first = iter;

    38     // Advance to the next whitespace character

    39     while (iter != end && ! nsCRT::IsAsciiSpace(*iter))

    40       ++iter;

    42     // XXX this would be nonsensical

    43     NS_ASSERTION(iter != first, "eh? something's wrong here");

    44     if (iter == first)

    45       break;

    47     nsCOMPtr<nsIAtom> atom = do_GetAtom(Substring(first, iter));

    48     aPropertiesArray.AppendElement(atom);

    49   } while (iter != end);

    51   return NS_OK;

    52 }

    54 nsIContent*

    55 nsTreeUtils::GetImmediateChild(nsIContent* aContainer, nsIAtom* aTag)

    56 {

    57   dom::FlattenedChildIterator iter(aContainer);

    58   for (nsIContent* child = iter.GetNextChild(); child; child = iter.GetNextChild()) {

    59     if (child->Tag() == aTag) {

    60       return child;

    61     }

    62   }

    64   return nullptr;

    65 }

    67 nsIContent*

    68 nsTreeUtils::GetDescendantChild(nsIContent* aContainer, nsIAtom* aTag)

    69 {

    70   dom::FlattenedChildIterator iter(aContainer);

    71   for (nsIContent* child = iter.GetNextChild(); child; child = iter.GetNextChild()) {

    72     if (child->Tag() == aTag) {

    73       return child;

    74     }

    76     child = GetDescendantChild(child, aTag);

    77     if (child) {

    78       return child;

    79     }

    80   }

    82   return nullptr;

    83 }

    85 nsresult

    86 nsTreeUtils::UpdateSortIndicators(nsIContent* aColumn, const nsAString& aDirection)

    87 {

    88   aColumn->SetAttr(kNameSpaceID_None, nsGkAtoms::sortDirection, aDirection, true);

    89   aColumn->SetAttr(kNameSpaceID_None, nsGkAtoms::sortActive, NS_LITERAL_STRING("true"), true);

    91   // Unset sort attribute(s) on the other columns

    92   nsCOMPtr<nsIContent> parentContent = aColumn->GetParent();

    93   if (parentContent &&

    94       parentContent->NodeInfo()->Equals(nsGkAtoms::treecols,

    95                                         kNameSpaceID_XUL)) {

    96     uint32_t i, numChildren = parentContent->GetChildCount();

    97     for (i = 0; i < numChildren; ++i) {

    98       nsCOMPtr<nsIContent> childContent = parentContent->GetChildAt(i);

   100       if (childContent &&

   101           childContent != aColumn &&

   102           childContent->NodeInfo()->Equals(nsGkAtoms::treecol,

   103                                            kNameSpaceID_XUL)) {

   104         childContent->UnsetAttr(kNameSpaceID_None,

   105                                 nsGkAtoms::sortDirection, true);

   106         childContent->UnsetAttr(kNameSpaceID_None,

   107                                 nsGkAtoms::sortActive, true);

   108       }

   109     }

   110   }

   112   return NS_OK;

   113 }

   115 nsresult

   116 nsTreeUtils::GetColumnIndex(nsIContent* aColumn, int32_t* aResult)

   117 {

   118   nsIContent* parentContent = aColumn->GetParent();

   119   if (parentContent &&

   120       parentContent->NodeInfo()->Equals(nsGkAtoms::treecols,

   121                                         kNameSpaceID_XUL)) {

   122     uint32_t i, numChildren = parentContent->GetChildCount();

   123     int32_t colIndex = 0;

   124     for (i = 0; i < numChildren; ++i) {

   125       nsIContent *childContent = parentContent->GetChildAt(i);

   126       if (childContent &&

   127           childContent->NodeInfo()->Equals(nsGkAtoms::treecol,

   128                                            kNameSpaceID_XUL)) {

   129         if (childContent == aColumn) {

   130           *aResult = colIndex;

   131           return NS_OK;

   132         }

   133         ++colIndex;

   134       }

   135     }

   136   }

   138   *aResult = -1;

   139   return NS_OK;

   140 }

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