Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdegraphics@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

4 files changed, 441 insertions, 0 deletions

diff --git a/kfile-plugins/png/Makefile.am b/kfile-plugins/png/Makefile.am
new file mode 100644
index 00000000..9aa820b6
--- /dev/null
+++ b/kfile-plugins/png/Makefile.am
@@ -0,0 +1,22 @@
+## Makefile.am for png file meta info plugin
+
+# set the include path for X, qt and KDE
+INCLUDES         = $(all_includes)
+
+# these are the headers for your project
+noinst_HEADERS   = kfile_png.h 
+
+kde_module_LTLIBRARIES = kfile_png.la
+
+kfile_png_la_SOURCES = kfile_png.cpp
+kfile_png_la_LDFLAGS = $(all_libraries) -module $(KDE_PLUGIN)
+kfile_png_la_LIBADD = $(LIB_KIO)
+
+# let automoc handle all of the meta source files (moc)
+METASOURCES = AUTO
+
+messages:
+	$(XGETTEXT) *.cpp -o $(podir)/kfile_png.pot
+
+services_DATA = kfile_png.desktop
+servicesdir = $(kde_servicesdir)
diff --git a/kfile-plugins/png/kfile_png.cpp b/kfile-plugins/png/kfile_png.cpp
new file mode 100644
index 00000000..c3e54b66
--- /dev/null
+++ b/kfile-plugins/png/kfile_png.cpp
@@ -0,0 +1,315 @@
+/* This file is part of the KDE project
+ * Copyright (C) 2001, 2002 Rolf Magnus <ramagnus@kde.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation version 2.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ *  $Id$
+ */
+
+#include <stdlib.h>
+#include "kfile_png.h"
+
+#include <kurl.h>
+#include <kprocess.h>
+#include <klocale.h>
+#include <kgenericfactory.h>
+#include <kdebug.h>
+
+#include <qcstring.h>
+#include <qfile.h>
+#include <qdatetime.h>
+#include <qdict.h>
+#include <qvalidator.h>
+#include <zlib.h>
+
+// some defines to make it easier
+// don't tell me anything about preprocessor usage :)
+#define CHUNK_SIZE(data, index) ((data[index  ]<<24) + (data[index+1]<<16) + \
+                                 (data[index+2]<< 8) +  data[index+3])
+#define CHUNK_TYPE(data, index)  &data[index+4]
+#define CHUNK_HEADER_SIZE 12
+#define CHUNK_DATA(data, index, offset) data[8+index+offset]
+
+// known translations for common png keys
+static const char* knownTranslations[]
+#ifdef __GNUC__
+__attribute__((unused))
+#endif
+ = {
+  I18N_NOOP("Title"),
+  I18N_NOOP("Author"),
+  I18N_NOOP("Description"),
+  I18N_NOOP("Copyright"),
+  I18N_NOOP("Creation Time"),
+  I18N_NOOP("Software"),
+  I18N_NOOP("Disclaimer"),
+  I18N_NOOP("Warning"),
+  I18N_NOOP("Source"),
+  I18N_NOOP("Comment")
+};
+
+// and for the colors
+static const char* colors[] = {
+  I18N_NOOP("Grayscale"),
+  I18N_NOOP("Unknown"),
+  I18N_NOOP("RGB"),
+  I18N_NOOP("Palette"),
+  I18N_NOOP("Grayscale/Alpha"),
+  I18N_NOOP("Unknown"),
+  I18N_NOOP("RGB/Alpha")
+};
+
+  // and compressions
+static const char* compressions[] =
+{
+  I18N_NOOP("Deflate")
+};
+
+  // interlaced modes
+static const char* interlaceModes[] = {
+  I18N_NOOP("None"),
+  I18N_NOOP("Adam7")
+};
+
+typedef KGenericFactory<KPngPlugin> PngFactory;
+
+K_EXPORT_COMPONENT_FACTORY(kfile_png, PngFactory("kfile_png"))
+
+KPngPlugin::KPngPlugin(QObject *parent, const char *name,
+                       const QStringList &args)
+    : KFilePlugin(parent, name, args)
+{
+    kdDebug(7034) << "png plugin\n";
+
+    // set up our mime type
+    KFileMimeTypeInfo* info = addMimeTypeInfo( "image/png" );
+
+    KFileMimeTypeInfo::GroupInfo* group = 0;
+    KFileMimeTypeInfo::ItemInfo* item = 0;
+
+    // comment group
+    group = addGroupInfo(info, "Comment", i18n("Comment"));
+    addVariableInfo(group, QVariant::String, 0);
+
+    // technical group
+    group = addGroupInfo(info, "Technical", i18n("Technical Details"));
+
+    item = addItemInfo(group, "Dimensions", i18n("Dimensions"), QVariant::Size);
+    setHint( item, KFileMimeTypeInfo::Size );
+    setUnit(item, KFileMimeTypeInfo::Pixels);
+
+    item = addItemInfo(group, "BitDepth", i18n("Bit Depth"), QVariant::Int);
+    setUnit(item, KFileMimeTypeInfo::BitsPerPixel);
+
+    addItemInfo(group, "ColorMode", i18n("Color Mode"), QVariant::String);
+    addItemInfo(group, "Compression", i18n("Compression"), QVariant::String);
+    addItemInfo(group, "InterlaceMode", i18n("Interlace Mode"),QVariant::String);
+}
+
+bool KPngPlugin::readInfo( KFileMetaInfo& info, uint what)
+{
+    if ( info.path().isEmpty() ) // remote file
+        return false;
+    QFile f(info.path());
+    if ( !f.open(IO_ReadOnly) )
+        return false;
+
+    QIODevice::Offset fileSize = f.size();
+
+    if (fileSize < 29) return false;
+    // the technical group will be read from the first 29 bytes. If the file
+    // is smaller, we can't even read this.
+
+    bool readComments = false;
+    if (what & (KFileMetaInfo::Fastest |
+                KFileMetaInfo::DontCare |
+                KFileMetaInfo::ContentInfo)) readComments = true;
+    else
+	fileSize = 29; // No need to read more
+
+    uchar *data = new uchar[fileSize+1];
+    f.readBlock(reinterpret_cast<char*>(data), fileSize);
+    data[fileSize]='\n';
+
+    // find the start
+    if (data[0] == 137 && data[1] == 80 && data[2] == 78 && data[3] == 71 &&
+        data[4] ==  13 && data[5] == 10 && data[6] == 26 && data[7] == 10 )
+    {
+        // ok
+        // the IHDR chunk should be the first
+        if (!strncmp((char*)&data[12], "IHDR", 4))
+        {
+            // we found it, get the dimensions
+            ulong x,y;
+            x = (data[16]<<24) + (data[17]<<16) + (data[18]<<8) + data[19];
+            y = (data[20]<<24) + (data[21]<<16) + (data[22]<<8) + data[23];
+
+            uint type = data[25];
+            uint bpp =  data[24];
+            kdDebug(7034) << "dimensions " << x << "*" << y << endl;
+
+            // the bpp are only per channel, so we need to multiply the with
+            // the channel count
+            switch (type)
+            {
+                case 0: break;           // Grayscale
+                case 2: bpp *= 3; break; // RGB
+                case 3: break;           // palette
+                case 4: bpp *= 2; break; // grayscale w. alpha
+                case 6: bpp *= 4; break; // RGBA
+
+                default: // we don't get any sensible value here
+                    bpp = 0;
+            }
+
+            KFileMetaInfoGroup techgroup = appendGroup(info, "Technical");
+
+            appendItem(techgroup, "Dimensions", QSize(x, y));
+            appendItem(techgroup, "BitDepth", bpp);
+            appendItem(techgroup, "ColorMode",
+                       (type < sizeof(colors)/sizeof(colors[0]))
+                       ? i18n(colors[data[25]]) : i18n("Unknown"));
+
+            appendItem(techgroup, "Compression",
+                       (data[26] < sizeof(compressions)/sizeof(compressions[0]))
+                       ? i18n(compressions[data[26]]) : i18n("Unknown"));
+
+            appendItem(techgroup, "InterlaceMode",
+                       (data[28] < sizeof(interlaceModes)/sizeof(interlaceModes[0]))
+                       ? i18n(interlaceModes[data[28]]) : i18n("Unknown"));
+        }
+
+        // look for a tEXt chunk
+        if (readComments)
+        {
+            uint index = 8;
+            index += CHUNK_SIZE(data, index) + CHUNK_HEADER_SIZE;
+            KFileMetaInfoGroup commentGroup = appendGroup(info, "Comment");
+
+            while(index<fileSize-12)
+            {
+                while (index < fileSize - 12 &&
+                       strncmp((char*)CHUNK_TYPE(data,index), "tEXt", 4) &&
+                       strncmp((char*)CHUNK_TYPE(data,index), "zTXt", 4))
+
+                {
+                    if (!strncmp((char*)CHUNK_TYPE(data,index), "IEND", 4))
+                        goto end;
+
+                    index += CHUNK_SIZE(data, index) + CHUNK_HEADER_SIZE;
+                }
+
+                if (index < fileSize - 12)
+                {
+                    // we found a tEXt or zTXt field
+
+                    // get the key, it's a null terminated string at the
+                    //  chunk start
+
+                    uchar* key = &CHUNK_DATA(data,index,0);
+
+                    int keysize=0;
+                    for (;key[keysize]!=0; keysize++)
+                        // look if we reached the end of the file
+                        // (it might be corrupted)
+                        if (8+index+keysize>=fileSize)
+                            goto end;
+
+		    QByteArray arr;
+		    if(!strncmp((char*)CHUNK_TYPE(data,index), "zTXt", 4)) {
+			kdDebug(7034) << "We found a zTXt field\n";
+			// we get the compression method after the key
+			uchar* compressionMethod = &CHUNK_DATA(data,index,keysize+1);
+			if ( *compressionMethod != 0x00 ) {
+			    // then it isn't zlib compressed and we are sunk
+			    kdDebug(7034) << "Non-standard compression method." << endl;
+			    goto end;
+			}
+			// compressed string after the compression technique spec
+			uchar* compressedText = &CHUNK_DATA(data, index, keysize+2);
+			uint compressedTextSize = CHUNK_SIZE(data, index)-keysize-2;
+
+			// security check, also considering overflow wraparound from the addition --
+			// we may endup with a /smaller/ index if we wrap all the way around
+			uint firstIndex       = (uint)(compressedText - data);
+			uint onePastLastIndex = firstIndex + compressedTextSize;
+			if ( onePastLastIndex > fileSize || onePastLastIndex <= firstIndex)
+			    goto end;
+
+			uLongf uncompressedLen = compressedTextSize * 2; // just a starting point
+			int zlibResult;
+			do {
+			    arr.resize(uncompressedLen);
+			    zlibResult = uncompress((Bytef*)arr.data(), &uncompressedLen,
+						    compressedText, compressedTextSize);
+			    if (Z_OK == zlibResult) {
+				// then it is all OK
+				arr.resize(uncompressedLen);
+			    } else if (Z_BUF_ERROR == zlibResult) {
+				// the uncompressedArray needs to be larger
+				// kdDebug(7034) << "doubling size for decompression" << endl;
+				uncompressedLen *= 2;
+
+                                // DoS protection. can't be bigger than 64k
+                                if ( uncompressedLen > 131072 )
+                                    break;
+			    } else {
+				// something bad happened
+				goto end;
+			    }
+			} while (Z_BUF_ERROR == zlibResult);
+
+			if (Z_OK != zlibResult)
+			    goto end;
+		    } else if (!strncmp((char*)CHUNK_TYPE(data,index), "tEXt", 4)) {
+			kdDebug(7034) << "We found a tEXt field\n";
+			// the text comes after the key, but isn't null terminated
+			uchar* text = &CHUNK_DATA(data,index, keysize+1);
+			uint textsize = CHUNK_SIZE(data, index)-keysize-1;
+
+			// security check, also considering overflow wraparound from the addition --
+			// we may endup with a /smaller/ index if we wrap all the way around
+			uint firstIndex       = (uint)(text - data);
+			uint onePastLastIndex = firstIndex + textsize;
+
+			if ( onePastLastIndex > fileSize || onePastLastIndex <= firstIndex)
+			    goto end;
+
+			arr.resize(textsize);
+			arr = QByteArray(textsize).duplicate((const char*)text,
+							     textsize);
+			
+		    } else {
+			kdDebug(7034) << "We found a field, not expected though\n";
+			goto end;
+		    }
+		    appendItem(commentGroup,
+			       QString(reinterpret_cast<char*>(key)),
+			       QString(arr));
+		    
+		    kdDebug(7034) << "adding " << key << " / "
+				  << QString(arr) << endl;
+
+		    index += CHUNK_SIZE(data, index) + CHUNK_HEADER_SIZE;
+                }
+            }
+        }
+    }
+end:
+    delete[] data;
+    return true;
+}
+
+#include "kfile_png.moc"
diff --git a/kfile-plugins/png/kfile_png.desktop b/kfile-plugins/png/kfile_png.desktop
new file mode 100644
index 00000000..b4819b8d
--- /dev/null
+++ b/kfile-plugins/png/kfile_png.desktop
@@ -0,0 +1,65 @@
+[Desktop Entry]
+Type=Service
+Name=PNG Info
+Name[af]=Png Inligting
+Name[ar]=معلومات PNG
+Name[br]=Titouroù PNG
+Name[ca]=Informació de PNG
+Name[cs]=PNG info
+Name[cy]=Gybodaeth PNG
+Name[da]=PNG-info
+Name[de]=PNG-Info
+Name[el]=Πληροφορίες PNG
+Name[eo]=PNG-informo
+Name[es]=Info PNG
+Name[et]=PNG info
+Name[fa]=اطلاعات PNG
+Name[fi]=PNG-tiedot
+Name[fr]=Informations PNG
+Name[gl]=Inf. PNG
+Name[he]=מידע PNG
+Name[hi]=PNG जानकारी
+Name[hr]=PNG Informacije
+Name[hu]=PNG-jellemzők
+Name[is]=PNG upplýsingar
+Name[it]=Informazioni PNG
+Name[ja]=PNG 情報
+Name[kk]=PNG мәліметі
+Name[km]=ព័ត៌មាន PNG
+Name[lt]=PNG informacija
+Name[ms]=Maklumat PNG
+Name[nds]=PNG-Info
+Name[ne]=PNG सूचना
+Name[nl]=PNG-Info
+Name[nn]=PNG-info
+Name[nso]=Tshedimoso ya PNG
+Name[pa]=PNG ਜਾਣਕਾਰੀ
+Name[pl]=Informacja o pliku PNG
+Name[pt]=Informação do PNG
+Name[pt_BR]= Informação sobre PNG
+Name[ro]=Informaţii PNG
+Name[ru]=Информация о PNG
+Name[se]=PNG-dieđut
+Name[sl]=Podatki o PNG
+Name[sr]=PNG информације
+Name[sr@Latn]=PNG informacije
+Name[sv]=PNG-information
+Name[ta]=PNG தகவல்
+Name[tg]=Иттилоот оиди PNG
+Name[th]=ข้อมูลแฟ้ม PNG
+Name[tr]=PNG Bilgisi
+Name[uk]=Інформація про PNG
+Name[uz]=PNG haqida maʼlumot
+Name[uz@cyrillic]=PNG ҳақида маълумот
+Name[ven]=Mafhungo a PNG
+Name[wa]=Informåcion sol imådje PNG
+Name[xh]=PNG Ulwazi
+Name[zh_CN]=PNG 信息
+Name[zh_HK]=PNG 資訊
+Name[zh_TW]=PNG 資訊
+Name[zu]=Ulwazi lwe-PNG
+ServiceTypes=KFilePlugin
+X-KDE-Library=kfile_png
+MimeType=image/png
+PreferredGroups=Comment,Technical
+PreferredItems=Title,Author,Dimensions,BitDepth,ColorMode,Compression
diff --git a/kfile-plugins/png/kfile_png.h b/kfile-plugins/png/kfile_png.h
new file mode 100644
index 00000000..0873d55d
--- /dev/null
+++ b/kfile-plugins/png/kfile_png.h
@@ -0,0 +1,39 @@
+/* This file is part of the KDE project
+ * Copyright (C) 2001, 2002 Rolf Magnus <ramagnus@kde.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation version 2.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ *  $Id$
+ */
+
+#ifndef __KFILE_PNG_H__
+#define __KFILE_PNG_H__
+
+#include <kfilemetainfo.h>
+#include <kurl.h>
+
+class QStringList;
+
+class KPngPlugin: public KFilePlugin
+{
+    Q_OBJECT
+    
+public:
+    KPngPlugin( QObject *parent, const char *name, const QStringList& preferredItems );
+
+    virtual bool readInfo( KFileMetaInfo& info, uint );
+};
+
+#endif