gecko-dev/layout/inspector/nsFontFaceList.cpp

96 lines
2.6 KiB
C++

/* 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/. */
#include "nsFontFaceList.h"
#include "nsFontFace.h"
#include "nsFontFaceLoader.h"
#include "nsIFrame.h"
#include "gfxFont.h"
#include "mozilla/gfx/2D.h"
nsFontFaceList::nsFontFaceList()
{
}
nsFontFaceList::~nsFontFaceList()
{
}
////////////////////////////////////////////////////////////////////////
// nsISupports
NS_IMPL_ISUPPORTS1(nsFontFaceList, nsIDOMFontFaceList)
////////////////////////////////////////////////////////////////////////
// nsIDOMFontFaceList
/* nsIDOMFontFace item (in unsigned long index); */
struct FindByIndexData {
uint32_t mTarget;
uint32_t mCurrent;
nsIDOMFontFace* mResult;
};
static PLDHashOperator
FindByIndex(gfxFontEntry* aKey, nsIDOMFontFace* aData, void* aUserData)
{
FindByIndexData* data = static_cast<FindByIndexData*>(aUserData);
if (data->mCurrent == data->mTarget) {
data->mResult = aData;
return PL_DHASH_STOP;
}
data->mCurrent++;
return PL_DHASH_NEXT;
}
NS_IMETHODIMP
nsFontFaceList::Item(uint32_t index, nsIDOMFontFace **_retval)
{
NS_ENSURE_TRUE(index < mFontFaces.Count(), NS_ERROR_INVALID_ARG);
FindByIndexData userData;
userData.mTarget = index;
userData.mCurrent = 0;
userData.mResult = nullptr;
mFontFaces.EnumerateRead(FindByIndex, &userData);
NS_ASSERTION(userData.mResult != nullptr, "null entry in nsFontFaceList?");
NS_IF_ADDREF(*_retval = userData.mResult);
return NS_OK;
}
/* readonly attribute unsigned long length; */
NS_IMETHODIMP
nsFontFaceList::GetLength(uint32_t *aLength)
{
*aLength = mFontFaces.Count();
return NS_OK;
}
////////////////////////////////////////////////////////////////////////
// nsFontFaceList
nsresult
nsFontFaceList::AddFontsFromTextRun(gfxTextRun* aTextRun,
uint32_t aOffset, uint32_t aLength)
{
gfxTextRun::GlyphRunIterator iter(aTextRun, aOffset, aLength);
while (iter.NextRun()) {
gfxFontEntry *fe = iter.GetGlyphRun()->mFont->GetFontEntry();
// if we have already listed this face, just make sure the match type is
// recorded
nsFontFace* existingFace =
static_cast<nsFontFace*>(mFontFaces.GetWeak(fe));
if (existingFace) {
existingFace->AddMatchType(iter.GetGlyphRun()->mMatchType);
} else {
// A new font entry we haven't seen before
nsCOMPtr<nsFontFace> ff =
new nsFontFace(fe, aTextRun->GetFontGroup(),
iter.GetGlyphRun()->mMatchType);
mFontFaces.Put(fe, ff);
}
}
return NS_OK;
}