MODULE WebBrowserComponents;
IMPORT
Strings, WMStandardComponents, WMGraphics, WMRectangles, WMEvents, WebHTTP, NewHTTPClient, Streams, Files,
Raster, Codecs, KernelLog, WMComponents, WMTextView, Texts, TextUtilities, WMWindowManager,
XML, SVG, SVGLoader;
CONST
verbose = TRUE;
MaxHTTPConnections = 16;
MaxHTTPConnectionPerServer = 3;
TYPE
String = Strings.String;
VisualComponent = WMComponents.VisualComponent;
SVGPanel* = OBJECT(VisualComponent)
VAR
img : SVG.Document;
PROCEDURE & New*(svg: XML.Element);
BEGIN
Init;
IF verbose THEN KernelLog.String("---Rendering SVG... "); END;
img := SVGLoader.LoadSVGEmbedded(svg);
IF img # NIL THEN
bounds.SetExtents(img.width, img.height);
IF verbose THEN KernelLog.String("done."); KernelLog.Ln(); END;
ELSE
bounds.SetExtents(15, 15);
IF verbose THEN KernelLog.String("failed."); KernelLog.Ln(); END;
END
END New;
PROCEDURE DrawBackground(canvas : WMGraphics.Canvas);
VAR
w, h : LONGINT;
BEGIN
DrawBackground^(canvas);
w := bounds.GetWidth();
h := bounds.GetHeight();
IF img # NIL THEN
canvas.ScaleImage(img, WMRectangles.MakeRect(0, 0, img.width, img.height), WMRectangles.MakeRect(0, 0, w, h), WMGraphics.ModeCopy, 2)
ELSE
canvas.Line(0, 0, w-1, 0, 0FFH, WMGraphics.ModeSrcOverDst);
canvas.Line(0, 0, 0, h-1, 0FFH, WMGraphics.ModeSrcOverDst);
canvas.Line(0, h-1, w-1, h-1, 0FFH, WMGraphics.ModeSrcOverDst);
canvas.Line(w-1, 0, w-1, h-1, 0FFH, WMGraphics.ModeSrcOverDst);
canvas.Line(0, 0, w-1, h-1, 0FFH, WMGraphics.ModeSrcOverDst);
canvas.Line(0, h-1, w-1, 0, 0FFH, WMGraphics.ModeSrcOverDst);
END;
END DrawBackground;
END SVGPanel;
SVGLinkPanel* = OBJECT(SVGPanel)
VAR
onClick : WMEvents.EventSource;
msg : ANY;
PROCEDURE & Create*(svg: XML.Element; loadLink : WMEvents.EventListener; msg : ANY);
BEGIN
New(svg);
NEW(onClick, SELF, NIL, NIL, SELF.StringToCompCommand);
events.Add(onClick);
onClick.Add(loadLink);
SELF.msg := msg;
SetPointerInfo(manager.pointerLink);
END Create;
PROCEDURE PointerDown(x, y: LONGINT; keys : SET);
BEGIN
onClick.Call(msg);
PointerDown^(x, y, keys);
END PointerDown;
END SVGLinkPanel;
StretchImagePanel* = OBJECT(VisualComponent)
VAR
img : WMGraphics.Image;
PROCEDURE & New*(rc : ResourceConnection; url : String; x, y : LONGINT);
BEGIN
Init;
IF rc = NIL THEN
rc := GetResourceConnection(url);
END;
IF (rc # NIL) & (rc.reader # NIL) THEN
IF verbose THEN KernelLog.String("---Loading StretchImagePanel. Url: "); KernelLog.String(rc.url^); KernelLog.String("... "); END;
IF ~Strings.StartsWith2("image/", rc.mimeType^) THEN rc.mimeType := GetMimeType(rc.url^) END;
img := LoadImage(rc.reader, rc.mimeType^, rc.url^);
IF img # NIL THEN
IF (x < 0) OR (y < 0) THEN
x := img.width;
y := img.height;
END;
bounds.SetExtents(x, y);
END;
IF verbose THEN KernelLog.String("done."); KernelLog.Ln(); END;
END;
IF (rc = NIL) OR (rc.reader = NIL) OR (img = NIL) THEN
fillColor.Set(0FFFFFFFFH);
IF (x < 0) OR (y < 0) THEN
x := 15;
y := 15;
END;
bounds.SetExtents(x, y);
END;
IF rc # NIL THEN rc.Release() END;
END New;
PROCEDURE DrawBackground(canvas : WMGraphics.Canvas);
VAR
w, h : LONGINT;
BEGIN
DrawBackground^(canvas);
w := bounds.GetWidth();
h := bounds.GetHeight();
IF img # NIL THEN
canvas.ScaleImage(img, WMRectangles.MakeRect(0, 0, img.width, img.height), WMRectangles.MakeRect(0, 0, w, h), WMGraphics.ModeCopy, 2)
ELSE
canvas.Line(0, 0, w-1, 0, 0FFH, WMGraphics.ModeSrcOverDst);
canvas.Line(0, 0, 0, h-1, 0FFH, WMGraphics.ModeSrcOverDst);
canvas.Line(0, h-1, w-1, h-1, 0FFH, WMGraphics.ModeSrcOverDst);
canvas.Line(w-1, 0, w-1, h-1, 0FFH, WMGraphics.ModeSrcOverDst);
canvas.Line(0, 0, w-1, h-1, 0FFH, WMGraphics.ModeSrcOverDst);
canvas.Line(0, h-1, w-1, 0, 0FFH, WMGraphics.ModeSrcOverDst);
END;
END DrawBackground;
END StretchImagePanel;
StretchImageLinkPanel* = OBJECT(StretchImagePanel)
VAR
onClick : WMEvents.EventSource;
msg : ANY;
PROCEDURE & Create*(rc : ResourceConnection; url : String; x, y : LONGINT; loadLink : WMEvents.EventListener; msg : ANY);
BEGIN
New(rc, url, x, y);
NEW(onClick, SELF, NIL, NIL, SELF.StringToCompCommand);
events.Add(onClick);
onClick.Add(loadLink);
SELF.msg := msg;
SetPointerInfo(manager.pointerLink);
END Create;
PROCEDURE PointerDown(x, y: LONGINT; keys : SET);
BEGIN
onClick.Call(msg);
PointerDown^(x, y, keys);
END PointerDown;
END StretchImageLinkPanel;
TileImagePanel* = OBJECT(VisualComponent)
VAR
img : WMGraphics.Image;
PROCEDURE & New*(rc : ResourceConnection; url : String);
BEGIN
Init;
alignment.Set(WMComponents.AlignClient);
IF rc = NIL THEN
rc := GetResourceConnection(url);
END;
IF (rc # NIL) & (rc.reader # NIL) THEN
IF verbose THEN KernelLog.String("---Loading TileImagePanel. Url: "); KernelLog.String(rc.url^); KernelLog.String("... "); END;
IF ~Strings.StartsWith2("image/", rc.mimeType^) THEN rc.mimeType := GetMimeType(rc.url^) END;
img := LoadImage(rc.reader, rc.mimeType^, rc.url^);
IF verbose THEN KernelLog.String("done."); KernelLog.Ln(); END;
END;
IF rc # NIL THEN rc.Release() END;
END New;
PROCEDURE DrawBackground(canvas : WMGraphics.Canvas);
VAR
w, h, i, j, wCnt, hCnt : LONGINT;
BEGIN
DrawBackground^(canvas);
IF img # NIL THEN
w := bounds.GetWidth();
h := bounds.GetHeight();
wCnt := w DIV img.width;
IF (wCnt * img.width) # w THEN INC(wCnt); END;
hCnt := h DIV img.height;
IF (hCnt * img.height) # h THEN INC(hCnt); END;
FOR i := 1 TO wCnt DO
FOR j := 1 TO hCnt DO
canvas.DrawImage((i-1)*img.width, (j-1)*img.height, img, WMGraphics.ModeSrcOverDst);
END;
END;
END
END DrawBackground;
END TileImagePanel;
HR* = OBJECT(VisualComponent)
VAR
x : LONGINT;
PROCEDURE & New*(x : LONGINT);
BEGIN
Init;
ParentTvWidthChanged(x);
END New;
PROCEDURE ParentTvWidthChanged*(x : LONGINT);
BEGIN
DEC(x, 30);
IF x < 10 THEN x := 10 END;
SELF.x := x;
bounds.SetExtents(x, 2);
END ParentTvWidthChanged;
PROCEDURE DrawBackground(canvas : WMGraphics.Canvas);
BEGIN
DrawBackground^(canvas);
canvas.Line(0, 0, x-1, 0, LONGINT(0808080FFH), WMGraphics.ModeSrcOverDst);
canvas.Line(0, 1, x-1, 1, LONGINT(0C0C0C0FFH), WMGraphics.ModeSrcOverDst);
END DrawBackground;
END HR;
ShortText* = OBJECT(VisualComponent)
VAR
textView : WMTextView.TextView;
PROCEDURE & New*(txt : ARRAY OF CHAR);
VAR
errorText : Texts.Text;
textWriter : TextUtilities.TextWriter;
BEGIN
Init;
NEW(textView);
textView.alignment.Set(WMComponents.AlignClient);
NEW(errorText);
NEW(textWriter, errorText);
textWriter.SetFontSize(20);
textWriter.SetVerticalOffset(20);
textWriter.String(txt);
textWriter.Update;
textView.SetText(errorText);
AddContent(textView);
alignment.Set(WMComponents.AlignClient);
END New;
END ShortText;
TextPanel* = OBJECT(VisualComponent)
PROCEDURE & New*(rc : ResourceConnection; url : String);
VAR
vScrollbar : WMStandardComponents.Scrollbar;
hScrollbar : WMStandardComponents.Scrollbar;
tv : WMTextView.TextView;
isoDecoder : Codecs.TextDecoder;
result : LONGINT;
BEGIN
Init;
takesFocus.Set(FALSE);
alignment.Set(WMComponents.AlignClient);
NEW(vScrollbar);
vScrollbar.alignment.Set(WMComponents.AlignRight);
AddContent(vScrollbar);
NEW(hScrollbar);
hScrollbar.alignment.Set(WMComponents.AlignBottom);
hScrollbar.vertical.Set(FALSE);
AddContent(hScrollbar);
IF rc = NIL THEN
rc := GetResourceConnection(url);
END;
IF (rc # NIL) & (rc.reader # NIL) THEN
IF verbose THEN KernelLog.String("---Loading TextPanel. Url: "); KernelLog.String(rc.url^); KernelLog.String("... "); END;
NEW(tv);
tv.alignment.Set(WMComponents.AlignClient);
tv.SetScrollbars(hScrollbar, vScrollbar);
AddContent(tv);
isoDecoder := Codecs.GetTextDecoder("ISO8859-1");
isoDecoder.Open(rc.reader, result);
tv.SetText(isoDecoder.GetText());
tv.cursor.SetPosition(0);
IF verbose THEN KernelLog.String("done."); KernelLog.Ln(); END;
END;
IF rc # NIL THEN rc.Release() END;
END New;
END TextPanel;
HTTPConnectionPool = OBJECT
VAR
connection : ARRAY MaxHTTPConnections OF ResourceConnection;
conCnt : LONGINT;
PROCEDURE & Init*;
BEGIN
conCnt := 0;
END Init;
PROCEDURE Get(url : String) : ResourceConnection;
BEGIN {EXCLUSIVE}
RETURN PrivateGet(url);
END Get;
PROCEDURE PrivateGet(url : String) : ResourceConnection;
VAR
server, newServer : String;
index : LONGINT;
i : LONGINT;
con : ResourceConnection;
charset: WebHTTP.AdditionalField;
reader : Streams.Reader;
result : LONGINT;
cnt : LONGINT;
BEGIN
server := GetServer(url^);
AWAIT((conCnt < MaxHTTPConnections) & (ServerCnt(server) < MaxHTTPConnectionPerServer));
index := -1; i := 0;
WHILE((index = -1) & (i < MaxHTTPConnections)) DO
IF (connection[i] # NIL) & (connection[i].server^ = server^) & (~connection[i].busy) THEN
index := i;
END;
IF (i = MaxHTTPConnections - 1) & (index = -1) THEN
i := 0;
WHILE((index = -1) & (i < MaxHTTPConnections)) DO
IF connection[i] = NIL THEN
index := i;
END;
INC(i);
END;
IF index = -1 THEN
i := 0;
WHILE((index = -1) & (i < MaxHTTPConnections)) DO
IF ~connection[i].busy THEN
index := i;
END;
INC(i);
END;
END;
ASSERT(index >= 0);
END;
INC(i);
END;
ASSERT(index >= 0);
con := connection[index];
IF con = NIL THEN
NEW(connection[index]);
con := connection[index];
con.index := index;
con.server := server;
NEW(con.http);
con.http.requestHeader.useragent := "BimBrowser (bluebottle.ethz.ch)";
IF Strings.Pos("google.", url^) # -1 THEN
con.http.requestHeader.useragent := "Mozilla/5.0";
END;
NEW(charset);
charset.key := "Accept-Charset:";
charset.value := "UTF-8,ISO-8859-1";
con.http.requestHeader.additionalFields := charset;
END;
con.busy := TRUE;
cnt := 0;
LOOP
con.http.Get(url^, TRUE, reader, result);
IF (cnt < 16) & (result = 0) & ((con.http.responseHeader.statuscode >= 301) & (con.http.responseHeader.statuscode <= 303)) THEN
IF Strings.Pos("://", con.http.responseHeader.location) = -1 THEN
IF ~Strings.StartsWith2("/", con.http.responseHeader.location) THEN
url := Strings.ConcatToNew(server^, "/");
url := Strings.ConcatToNew(url^, con.http.responseHeader.location);
ELSE
url := Strings.ConcatToNew(server^, con.http.responseHeader.location);
END;
ELSE
url := Strings.NewString(con.http.responseHeader.location);
newServer := GetServer(con.http.responseHeader.location);
IF server^ # newServer^ THEN
con.busy := FALSE;
RETURN PrivateGet(url);
END;
END;
IF verbose THEN KernelLog.String("---Redirecting to "); KernelLog.String(url^); KernelLog.Ln(); END;
WHILE reader.Get() # 0X DO END;
INC(cnt);
ELSE
EXIT;
END;
END;
con.url := url;
con.mimeType := Strings.NewString(con.http.responseHeader.contenttype);
Strings.TrimWS(con.mimeType^);
con.reader := reader;
con.released := FALSE;
IF result # 0 THEN
con.busy := FALSE;
RETURN NIL;
ELSE
INC(conCnt);
RETURN con;
END;
END PrivateGet;
PROCEDURE Release(rc : ResourceConnection);
BEGIN {EXCLUSIVE}
connection[rc.index].busy := FALSE;
DEC(conCnt);
END Release;
PROCEDURE ServerCnt(server : String) : LONGINT;
VAR
cnt, i : LONGINT;
BEGIN
cnt := 0;
FOR i := 0 TO MaxHTTPConnections - 1 DO
IF (connection[i] # NIL) & (connection[i].server^ = server^) & (connection[i].busy) THEN INC(cnt) END;
END;
RETURN cnt;
END ServerCnt;
PROCEDURE GetServer(VAR url : ARRAY OF CHAR) : String;
VAR
end : LONGINT;
BEGIN
end := Strings.IndexOfByte('/', Strings.Pos("://", url) + 3, url);
IF end = -1 THEN end := Strings.Length(url) END;
RETURN Strings.Substring(0, end, url);
END GetServer;
END HTTPConnectionPool;
ResourceConnection* = OBJECT
VAR
url- : String;
mimeType- : String;
reader- : Streams.Reader;
http : NewHTTPClient.HTTPConnection;
busy : BOOLEAN;
index : LONGINT;
server : String;
released : BOOLEAN;
PROCEDURE Stop*;
BEGIN {EXCLUSIVE}
IF ~released & (http # NIL) THEN
http.Close();
server := Strings.NewString("");
END;
END Stop;
PROCEDURE Release*;
BEGIN {EXCLUSIVE}
released := TRUE;
IF http # NIL THEN
httpConnectionPool.Release(SELF);
END;
END Release;
END ResourceConnection;
VAR
manager : WMWindowManager.WindowManager;
httpConnectionPool : HTTPConnectionPool;
PROCEDURE GetResourceConnection*(url : String) : ResourceConnection;
VAR
pos : LONGINT;
protocol : String;
filename : String;
connection : ResourceConnection;
file : Files.File;
fileReader : Files.Reader;
BEGIN
Strings.TrimWS(url^);
pos := Strings.Pos("://", url^);
IF pos = -1 THEN
IF verbose THEN KernelLog.String("Unknown Protocol: "); KernelLog.String(url^); KernelLog.Ln(); END;
RETURN NIL;
END;
protocol := Strings.Substring(0, pos, url^);
IF (pos + 3) >= Strings.Length(url^) THEN
IF verbose THEN KernelLog.String("Bad URL: "); KernelLog.String(url^); KernelLog.Ln(); END;
RETURN NIL;
END;
filename := Strings.Substring2(pos+3, url^);
ClearFilename(filename^);
IF protocol^ = "http" THEN
RETURN httpConnectionPool.Get(url);
ELSIF protocol^ = "file" THEN
file := Files.Old(filename^);
IF file = NIL THEN
IF verbose THEN KernelLog.String("file not found: "); KernelLog.String(url^); KernelLog.Ln(); END;
RETURN NIL;
END;
Files.OpenReader(fileReader, file, 0);
NEW(connection);
connection.url := url;
connection.mimeType := GetMimeType(filename^);
connection.reader := fileReader;
RETURN connection;
ELSE
IF verbose THEN KernelLog.String("Unknown Protocol: "); KernelLog.String(protocol^); KernelLog.Ln(); END;
RETURN NIL;
END;
END GetResourceConnection;
PROCEDURE ClearFilename( VAR name: ARRAY OF CHAR );
VAR i: LONGINT;
BEGIN
i := 0;
LOOP
IF name[i] < '.' THEN name[i] := 0X END;
IF name[i] = 0X THEN EXIT END;
INC( i );
IF i >= LEN( name ) THEN EXIT END
END
END ClearFilename;
PROCEDURE GetMimeType(VAR filename : ARRAY OF CHAR) : String;
VAR
dotPos : LONGINT;
appendix : String;
BEGIN
Strings.TrimWS(filename);
dotPos := Strings.LastIndexOfByte2('.', filename);
IF (dotPos = -1) OR (dotPos = Strings.Length(filename) - 1) THEN
RETURN Strings.NewString(filename);
END;
appendix := Strings.Substring2(dotPos + 1, filename);
Strings.LowerCase(appendix^);
IF appendix^ = "html" THEN RETURN Strings.NewString("text/html"); END;
IF appendix^ = "htm" THEN RETURN Strings.NewString("text/html"); END;
IF appendix^ = "txt" THEN RETURN Strings.NewString("text/plain"); END;
IF appendix^ = "jpg" THEN RETURN Strings.NewString("image/jpeg"); END;
IF appendix^ = "jpeg" THEN RETURN Strings.NewString("image/jpeg"); END;
IF appendix^ = "jpe" THEN RETURN Strings.NewString("image/jpeg"); END;
IF appendix^ = "jp2" THEN RETURN Strings.NewString("image/jp2"); END;
IF appendix^ = "png" THEN RETURN Strings.NewString("image/png"); END;
IF appendix^ = "bmp" THEN RETURN Strings.NewString("image/bmp"); END;
IF appendix^ = "gif" THEN RETURN Strings.NewString("image/gif"); END;
IF appendix^ = "svg" THEN RETURN Strings.NewString("image/svg+xml"); END;
IF appendix^ = "xml" THEN RETURN Strings.NewString("application/xml"); END;
IF appendix^ = "pdf" THEN RETURN Strings.NewString("application/pdf"); END;
RETURN appendix;
END GetMimeType;
PROCEDURE LoadImage*(reader : Streams.Reader; mimeType : ARRAY OF CHAR; name : ARRAY OF CHAR): WMGraphics.Image;
VAR
img : WMGraphics.Image;
res, w, h, x : LONGINT;
decoder : Codecs.ImageDecoder;
ext : String;
PROCEDURE GetExtensionForMimeType(VAR mimeType : ARRAY OF CHAR) : String;
BEGIN
IF Strings.StartsWith2("image/jpeg", mimeType) THEN RETURN Strings.NewString("JPG"); END;
IF Strings.StartsWith2("image/jp2", mimeType) THEN RETURN Strings.NewString("JP2"); END;
IF Strings.StartsWith2("image/png", mimeType) THEN RETURN Strings.NewString("PNG"); END;
IF Strings.StartsWith2("image/bmp", mimeType) THEN RETURN Strings.NewString("BMP"); END;
IF Strings.StartsWith2("image/gif", mimeType) THEN RETURN Strings.NewString("GIF"); END;
IF Strings.StartsWith2("image/svg+xml", mimeType) THEN RETURN Strings.NewString("SVG"); END;
RETURN Strings.NewString("");
END GetExtensionForMimeType;
BEGIN
IF reader = NIL THEN RETURN NIL END;
ext := GetExtensionForMimeType(mimeType);
decoder := Codecs.GetImageDecoder(ext^);
IF decoder = NIL THEN
KernelLog.String("No decoder found for "); KernelLog.String(mimeType); KernelLog.Ln;
RETURN NIL
END;
decoder.Open(reader, res);
IF res = 0 THEN
decoder.GetImageInfo(w, h, x, x);
NEW(img);
Raster.Create(img, w, h, Raster.BGRA8888);
decoder.Render(img);
NEW(img.key, LEN(name)); COPY(name, img.key^);
END;
RETURN img
END LoadImage;
BEGIN
manager := WMWindowManager.GetDefaultManager();
NEW(httpConnectionPool);
END WebBrowserComponents.