зеркало из https://github.com/mozilla/gecko-dev.git
Crib the font enum code from xft. Pango doesn't do what we want, and this code will work fine for what it is used for. Not part of the default build.
This commit is contained in:
blizzard%redhat.com
Родитель
f6e45ec1cd
Коммит
1f89490771
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@ -48,8 +48,10 @@
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#include "nsFontMetricsPango.h"
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#include "nsRenderingContextGTK.h"
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#include "nsDeviceContextGTK.h"
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#include "nsFontConfigUtils.h"
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#include "nsUnicharUtils.h"
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#include "nsQuickSort.h"
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#include <pango/pangoxft.h>
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#include <fontconfig/fontconfig.h>
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@ -57,6 +59,8 @@
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#include <gdk/gdkx.h>
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#include <freetype/tttables.h>
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#include "mozilla-decoder.h"
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#define FORCE_PR_LOG
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#include "prlog.h"
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@ -122,6 +126,11 @@ static void FreeGlobals (void);
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static PangoStyle CalculateStyle (PRUint8 aStyle);
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static PangoWeight CalculateWeight (PRUint16 aWeight);
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static nsresult EnumFontsPango (nsIAtom* aLangGroup, const char* aGeneric,
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PRUint32* aCount, PRUnichar*** aResult);
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static int CompareFontNames (const void* aArg1, const void* aArg2,
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void* aClosure);
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nsFontMetricsPango::nsFontMetricsPango()
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{
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if (!gPangoFontLog)
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@ -1421,4 +1430,224 @@ CalculateWeight (PRUint16 aWeight)
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return (PangoWeight)fcWeights[fcWeight];
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}
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/* static */
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nsresult
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EnumFontsPango(nsIAtom* aLangGroup, const char* aGeneric,
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PRUint32* aCount, PRUnichar*** aResult)
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{
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FcPattern *pat = NULL;
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FcObjectSet *os = NULL;
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FcFontSet *fs = NULL;
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nsresult rv = NS_ERROR_FAILURE;
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PRUnichar **array = NULL;
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PRUint32 narray = 0;
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PRInt32 serif = 0, sansSerif = 0, monospace = 0, nGenerics;
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*aCount = 0;
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*aResult = nsnull;
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pat = FcPatternCreate();
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if (!pat)
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goto end;
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os = FcObjectSetBuild(FC_FAMILY, FC_FOUNDRY, 0);
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if (!os)
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goto end;
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// take the pattern and add the lang group to it
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if (aLangGroup)
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NS_AddLangGroup(pat, aLangGroup);
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// get the font list
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fs = FcFontList(0, pat, os);
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if (!fs)
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goto end;
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if (!fs->nfont) {
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rv = NS_OK;
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goto end;
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}
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// Fontconfig supports 3 generic fonts, "serif", "sans-serif", and
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// "monospace", slightly different from CSS's 5.
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if (!aGeneric)
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serif = sansSerif = monospace = 1;
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else if (!strcmp(aGeneric, "serif"))
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serif = 1;
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else if (!strcmp(aGeneric, "sans-serif"))
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sansSerif = 1;
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else if (!strcmp(aGeneric, "monospace"))
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monospace = 1;
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else if (!strcmp(aGeneric, "cursive") || !strcmp(aGeneric, "fantasy"))
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serif = sansSerif = 1;
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else
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NS_NOTREACHED("unexpected generic family");
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nGenerics = serif + sansSerif + monospace;
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array = NS_STATIC_CAST(PRUnichar **,
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nsMemory::Alloc((fs->nfont + nGenerics) * sizeof(PRUnichar *)));
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if (!array)
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goto end;
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if (serif) {
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PRUnichar *name = ToNewUnicode(NS_LITERAL_STRING("serif"));
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if (!name)
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goto end;
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array[narray++] = name;
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}
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if (sansSerif) {
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PRUnichar *name = ToNewUnicode(NS_LITERAL_STRING("sans-serif"));
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if (!name)
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goto end;
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array[narray++] = name;
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}
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if (monospace) {
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PRUnichar *name = ToNewUnicode(NS_LITERAL_STRING("monospace"));
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if (!name)
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goto end;
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array[narray++] = name;
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}
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for (int i=0; i < fs->nfont; ++i) {
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char *family;
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PRUnichar *name;
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// if there's no family, just move to the next iteration
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if (FcPatternGetString (fs->fonts[i], FC_FAMILY, 0,
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(FcChar8 **) &family) != FcResultMatch) {
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continue;
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}
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name = NS_STATIC_CAST(PRUnichar *,
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nsMemory::Alloc ((strlen (family) + 1)
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* sizeof (PRUnichar)));
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if (!name)
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goto end;
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PRUnichar *r = name;
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for (char *f = family; *f; ++f)
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*r++ = *f;
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*r = '\0';
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array[narray++] = name;
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}
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NS_QuickSort(array + nGenerics, narray - nGenerics, sizeof (PRUnichar*),
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CompareFontNames, nsnull);
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*aCount = narray;
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if (narray)
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*aResult = array;
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else
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nsMemory::Free(array);
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rv = NS_OK;
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end:
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if (NS_FAILED(rv) && array) {
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while (narray)
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nsMemory::Free (array[--narray]);
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nsMemory::Free (array);
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}
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if (pat)
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FcPatternDestroy(pat);
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if (os)
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FcObjectSetDestroy(os);
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if (fs)
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FcFontSetDestroy(fs);
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return rv;
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}
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/* static */
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int
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CompareFontNames (const void* aArg1, const void* aArg2, void* aClosure)
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{
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const PRUnichar* str1 = *((const PRUnichar**) aArg1);
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const PRUnichar* str2 = *((const PRUnichar**) aArg2);
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return nsCRT::strcmp(str1, str2);
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}
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// nsFontEnumeratorPango class
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nsFontEnumeratorPango::nsFontEnumeratorPango()
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{
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}
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NS_IMPL_ISUPPORTS1(nsFontEnumeratorPango, nsIFontEnumerator)
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NS_IMETHODIMP
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nsFontEnumeratorPango::EnumerateAllFonts(PRUint32 *aCount,
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PRUnichar ***aResult)
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{
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NS_ENSURE_ARG_POINTER(aResult);
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*aResult = nsnull;
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NS_ENSURE_ARG_POINTER(aCount);
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*aCount = 0;
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return EnumFontsPango(nsnull, nsnull, aCount, aResult);
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}
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NS_IMETHODIMP
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nsFontEnumeratorPango::EnumerateFonts(const char *aLangGroup,
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const char *aGeneric,
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PRUint32 *aCount,
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PRUnichar ***aResult)
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{
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NS_ENSURE_ARG_POINTER(aResult);
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*aResult = nsnull;
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NS_ENSURE_ARG_POINTER(aCount);
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*aCount = 0;
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// aLangGroup=null or "" means any (i.e., don't care)
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// aGeneric=null or "" means any (i.e, don't care)
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nsCOMPtr<nsIAtom> langGroup;
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if (aLangGroup && *aLangGroup)
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langGroup = do_GetAtom(aLangGroup);
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const char* generic = nsnull;
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if (aGeneric && *aGeneric)
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generic = aGeneric;
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return EnumFontsPango(langGroup, generic, aCount, aResult);
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}
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NS_IMETHODIMP
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nsFontEnumeratorPango::HaveFontFor(const char *aLangGroup,
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PRBool *aResult)
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{
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NS_ENSURE_ARG_POINTER(aResult);
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*aResult = PR_FALSE;
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NS_ENSURE_ARG_POINTER(aLangGroup);
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*aResult = PR_TRUE; // always return true for now.
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// Finish me - ftang
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return NS_OK;
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}
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NS_IMETHODIMP
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nsFontEnumeratorPango::GetDefaultFont(const char *aLangGroup,
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const char *aGeneric,
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PRUnichar **aResult)
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{
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NS_ENSURE_ARG_POINTER(aResult);
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*aResult = nsnull;
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// Have a look at nsFontEnumeratorXft::GetDefaultFont for some
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// possible code for this function.
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return NS_OK;
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}
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NS_IMETHODIMP
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nsFontEnumeratorPango::UpdateFontList(PRBool *_retval)
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{
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*_retval = PR_FALSE; // always return false for now
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return NS_OK;
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}
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