1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/xul/nsListBoxObject.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,211 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "nsCOMPtr.h"
1.10 +#include "nsPIListBoxObject.h"
1.11 +#include "nsBoxObject.h"
1.12 +#include "nsIFrame.h"
1.13 +#include "nsBindingManager.h"
1.14 +#include "nsIDOMElement.h"
1.15 +#include "nsIDOMNodeList.h"
1.16 +#include "nsGkAtoms.h"
1.17 +#include "nsIScrollableFrame.h"
1.18 +#include "nsListBoxBodyFrame.h"
1.19 +#include "ChildIterator.h"
1.20 +
1.21 +class nsListBoxObject : public nsPIListBoxObject, public nsBoxObject
1.22 +{
1.23 +public:
1.24 + NS_DECL_ISUPPORTS_INHERITED
1.25 + NS_DECL_NSILISTBOXOBJECT
1.26 +
1.27 + // nsPIListBoxObject
1.28 + virtual nsListBoxBodyFrame* GetListBoxBody(bool aFlush) MOZ_OVERRIDE;
1.29 +
1.30 + nsListBoxObject();
1.31 +
1.32 + // nsPIBoxObject
1.33 + virtual void Clear() MOZ_OVERRIDE;
1.34 + virtual void ClearCachedValues() MOZ_OVERRIDE;
1.35 +
1.36 +protected:
1.37 + nsListBoxBodyFrame *mListBoxBody;
1.38 +};
1.39 +
1.40 +NS_IMPL_ISUPPORTS_INHERITED(nsListBoxObject, nsBoxObject, nsIListBoxObject,
1.41 + nsPIListBoxObject)
1.42 +
1.43 +nsListBoxObject::nsListBoxObject()
1.44 + : mListBoxBody(nullptr)
1.45 +{
1.46 +}
1.47 +
1.48 +//////////////////////////////////////////////////////////////////////////
1.49 +//// nsIListBoxObject
1.50 +
1.51 +NS_IMETHODIMP
1.52 +nsListBoxObject::GetRowCount(int32_t *aResult)
1.53 +{
1.54 + nsListBoxBodyFrame* body = GetListBoxBody(true);
1.55 + if (body)
1.56 + return body->GetRowCount(aResult);
1.57 + return NS_OK;
1.58 +}
1.59 +
1.60 +NS_IMETHODIMP
1.61 +nsListBoxObject::GetNumberOfVisibleRows(int32_t *aResult)
1.62 +{
1.63 + nsListBoxBodyFrame* body = GetListBoxBody(true);
1.64 + if (body)
1.65 + return body->GetNumberOfVisibleRows(aResult);
1.66 + return NS_OK;
1.67 +}
1.68 +
1.69 +NS_IMETHODIMP
1.70 +nsListBoxObject::GetIndexOfFirstVisibleRow(int32_t *aResult)
1.71 +{
1.72 + nsListBoxBodyFrame* body = GetListBoxBody(true);
1.73 + if (body)
1.74 + return body->GetIndexOfFirstVisibleRow(aResult);
1.75 + return NS_OK;
1.76 +}
1.77 +
1.78 +NS_IMETHODIMP nsListBoxObject::EnsureIndexIsVisible(int32_t aRowIndex)
1.79 +{
1.80 + nsListBoxBodyFrame* body = GetListBoxBody(true);
1.81 + if (body)
1.82 + return body->EnsureIndexIsVisible(aRowIndex);
1.83 + return NS_OK;
1.84 +}
1.85 +
1.86 +NS_IMETHODIMP
1.87 +nsListBoxObject::ScrollToIndex(int32_t aRowIndex)
1.88 +{
1.89 + nsListBoxBodyFrame* body = GetListBoxBody(true);
1.90 + if (body)
1.91 + return body->ScrollToIndex(aRowIndex);
1.92 + return NS_OK;
1.93 +}
1.94 +
1.95 +NS_IMETHODIMP
1.96 +nsListBoxObject::ScrollByLines(int32_t aNumLines)
1.97 +{
1.98 + nsListBoxBodyFrame* body = GetListBoxBody(true);
1.99 + if (body)
1.100 + return body->ScrollByLines(aNumLines);
1.101 + return NS_OK;
1.102 +}
1.103 +
1.104 +NS_IMETHODIMP
1.105 +nsListBoxObject::GetItemAtIndex(int32_t index, nsIDOMElement **_retval)
1.106 +{
1.107 + nsListBoxBodyFrame* body = GetListBoxBody(true);
1.108 + if (body)
1.109 + return body->GetItemAtIndex(index, _retval);
1.110 + return NS_OK;
1.111 +}
1.112 +
1.113 +NS_IMETHODIMP
1.114 +nsListBoxObject::GetIndexOfItem(nsIDOMElement* aElement, int32_t *aResult)
1.115 +{
1.116 + *aResult = 0;
1.117 +
1.118 + nsListBoxBodyFrame* body = GetListBoxBody(true);
1.119 + if (body)
1.120 + return body->GetIndexOfItem(aElement, aResult);
1.121 + return NS_OK;
1.122 +}
1.123 +
1.124 +//////////////////////
1.125 +
1.126 +static nsIContent*
1.127 +FindBodyContent(nsIContent* aParent)
1.128 +{
1.129 + if (aParent->Tag() == nsGkAtoms::listboxbody) {
1.130 + return aParent;
1.131 + }
1.132 +
1.133 + mozilla::dom::FlattenedChildIterator iter(aParent);
1.134 + for (nsIContent* child = iter.GetNextChild(); child; child = iter.GetNextChild()) {
1.135 + nsIContent* result = FindBodyContent(child);
1.136 + if (result) {
1.137 + return result;
1.138 + }
1.139 + }
1.140 +
1.141 + return nullptr;
1.142 +}
1.143 +
1.144 +nsListBoxBodyFrame*
1.145 +nsListBoxObject::GetListBoxBody(bool aFlush)
1.146 +{
1.147 + if (mListBoxBody) {
1.148 + return mListBoxBody;
1.149 + }
1.150 +
1.151 + nsIPresShell* shell = GetPresShell(false);
1.152 + if (!shell) {
1.153 + return nullptr;
1.154 + }
1.155 +
1.156 + nsIFrame* frame = aFlush ?
1.157 + GetFrame(false) /* does Flush_Frames */ :
1.158 + mContent->GetPrimaryFrame();
1.159 + if (!frame)
1.160 + return nullptr;
1.161 +
1.162 + // Iterate over our content model children looking for the body.
1.163 + nsCOMPtr<nsIContent> content = FindBodyContent(frame->GetContent());
1.164 +
1.165 + if (!content)
1.166 + return nullptr;
1.167 +
1.168 + // this frame will be a nsGFXScrollFrame
1.169 + frame = content->GetPrimaryFrame();
1.170 + if (!frame)
1.171 + return nullptr;
1.172 + nsIScrollableFrame* scrollFrame = do_QueryFrame(frame);
1.173 + if (!scrollFrame)
1.174 + return nullptr;
1.175 +
1.176 + // this frame will be the one we want
1.177 + nsIFrame* yeahBaby = scrollFrame->GetScrolledFrame();
1.178 + if (!yeahBaby)
1.179 + return nullptr;
1.180 +
1.181 + // It's a frame. Refcounts are irrelevant.
1.182 + nsListBoxBodyFrame* listBoxBody = do_QueryFrame(yeahBaby);
1.183 + NS_ENSURE_TRUE(listBoxBody &&
1.184 + listBoxBody->SetBoxObject(this),
1.185 + nullptr);
1.186 + mListBoxBody = listBoxBody;
1.187 + return mListBoxBody;
1.188 +}
1.189 +
1.190 +void
1.191 +nsListBoxObject::Clear()
1.192 +{
1.193 + ClearCachedValues();
1.194 +
1.195 + nsBoxObject::Clear();
1.196 +}
1.197 +
1.198 +void
1.199 +nsListBoxObject::ClearCachedValues()
1.200 +{
1.201 + mListBoxBody = nullptr;
1.202 +}
1.203 +
1.204 +// Creation Routine ///////////////////////////////////////////////////////////////////////
1.205 +
1.206 +nsresult
1.207 +NS_NewListBoxObject(nsIBoxObject** aResult)
1.208 +{
1.209 + *aResult = new nsListBoxObject;
1.210 + if (!*aResult)
1.211 + return NS_ERROR_OUT_OF_MEMORY;
1.212 + NS_ADDREF(*aResult);
1.213 + return NS_OK;
1.214 +}
