--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/client/digitallibrary/dllib.js	Tue Jul 20 09:57:24 2004 +0200
@@ -0,0 +1,436 @@
+/* Copyright (C) 2003,2004 WTWG Uni Bern and others
+ 
+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; either version 2
+of the License, or (at your option) any later version.
+ 
+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; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
+ 
+Authors: ROC 3.5.2004
+  first version by Christian Luginbuehl, 01.05.2003
+  Changed for digiLib in Zope by DW 24.03.2004
+
+Requires baselib.js !
+
+*/
+
+var dlScriptVersion = "0.9a1";
+
+/*
+ * more parameter handling
+ */
+
+var dlArea = new Rectangle(0.0, 0.0, 1.0, 1.0);
+var dlMaxArea = new Rectangle(0.0, 0.0, 1.0, 1.0);
+
+function parseArea() {
+    // returns area Rectangle from current parameters
+    return new Rectangle(getParameter("wx"), getParameter("wy"), getParameter("ww"), getParameter("wh"));
+}
+
+function setParamFromArea(rect) {
+    // sets digilib wx etc. from rect
+    setParameter("wx", cropFloat(rect.x));
+    setParameter("wy", cropFloat(rect.y));
+    setParameter("ww", cropFloat(rect.width));
+    setParameter("wh", cropFloat(rect.height));
+    return true;
+}
+
+var dlTrafo = new Transform();
+
+function parseTrafo(elem) {
+    // returns Transform from current dlArea and picsize
+    var picsize = getElementRect(elem);
+    var trafo = new Transform();
+    // subtract area offset and size
+    trafo.concat(getTranslation(new Position(-dlArea.x, -dlArea.y)));
+    trafo.concat(getScale(new Size(1/dlArea.width, 1/dlArea.height)));
+    // scale to screen size
+    trafo.concat(getScale(picsize));
+    trafo.concat(getTranslation(picsize));
+    // rotate
+    //trafo.concat(getRotation(- getParameter("rot"), new Position(0.5*picsize.width, 0.5*picsize.height)));
+    // mirror
+    //if (hasFlag("hmir")) {
+    //trafo.m00 = - trafo.m00;
+    //}
+    //if (hasFlag("vmir")) {
+    //trafo.m11 = - trafo.m11;
+    //}
+    return trafo;
+}
+
+
+var dlMarks = new Array();
+
+function parseMarks() {
+    // returns marks array from current parameters
+    var marks = new Array();
+    var ma;
+    var mk = getParameter("mk");
+    if (mk.indexOf(";") >= 0) {
+	// old format with ";"
+	ma = mk.split(";");
+    } else {
+	ma = mk.split(",");
+    }
+    for (var i = 0; i < ma.length ; i++) {
+	var pos = ma[i].split("/");
+	if (pos.length > 1) {
+	    marks.push(new Position(pos[0], pos[1]));
+	}
+    }
+    return marks;
+}
+
+function getAllMarks() {
+    // returns a string with all marks in query format
+    var marks = new Array();
+    for (var i = 0; i < dlMarks.length; i++) {
+	marks.push(cropFloat(dlMarks[i].x) + "/" + cropFloat(dlMarks[i].y));
+    }
+    return marks.join(",");
+}
+
+function addMark(pos) {
+    // add a mark
+    dlMarks.push(pos);
+    setParameter("mk", getAllMarks());
+    return true;
+}
+
+function deleteMark() {
+    // delete the last mark
+    dlMarks.pop();
+    setParameter("mk", getAllMarks());
+    return true;
+}
+
+var dlFlags = new Object();
+
+function hasFlag(mode) {
+    // returns if mode flag is set
+    return (dlFlags[mode]);
+}
+
+function addFlag(mode) {
+    // add a mode flag
+    dlFlags[mode] = mode;
+    return true;
+}
+
+function removeFlag(mode) {
+    // remove a mode flag
+    if (dlFlags[mode]) {
+	delete dlFlags[mode];
+    }
+    return true;
+}
+
+function toggleFlag(mode) {
+    // change a mode flag
+    if (dlFlags[mode]) {
+	delete dlFlags[mode];
+    } else {
+	dlFlags[mode] = mode;
+    }
+    return true;
+}
+
+function getAllFlags() {
+    // returns a string with all flags in query format
+    var fa = new Array();
+    for (var f in dlFlags) {
+	if ((f != "")&&(dlFlags[f] != null)) {
+	    fa.push(f);
+	}
+    }
+    return fa.join(",");
+}
+
+function parseFlags() {
+    // sets dlFlags from the current parameters
+    var flags = new Object();
+    var fa = getParameter("mo").split(",");
+    for (var i = 0; i < fa.length ; i++) {
+	var f = fa[i];
+	if (f != "") {
+	    flags[f] = f;
+	}
+    }
+    return flags;
+}    
+
+
+function bestPicSize(elem, inset) {
+    // returns a Size with the best image size for the given element
+    if (! defined(inset)) {
+	inset = 25;
+    }
+    var ws = getWinSize();
+    var es = getElementPosition(elem);
+    if (es) {
+	ws.width = ws.width - es.x - inset;
+	ws.height = ws.height - es.y - inset;
+    }
+    return ws;
+}
+
+
+/* **********************************************
+ *     digilib specific routines
+ * ******************************************** */
+
+var elemScaler = null;
+var picElem = null;
+
+function dl_init() {
+    elemScaler = getElement("scaler", true);
+    picElem = getElement("pic", true);
+    if (picElem == null && elemScaler) {
+	// in N4 pic is in the scaler layer
+	picElem = elemScaler.document.images[0];
+    }
+    if ((!elemScaler)||(!picElem)) {
+	alert("Sorry, zogilib doesn't work here!");
+	return false;
+    }
+    // give a name to the window containing digilib
+    if (defined(dlTarget)&&(dlTarget)) {
+	window.name = dlTarget;
+    } else {
+	window.name = "digilib";
+    }
+    // put the query parameters (sans "?") in the parameters array
+    parseParameters(location.search.slice(1));
+    // treat special parameters
+    dlMarks = parseMarks();
+    dlArea = parseArea();
+    dlFlags = parseFlags();
+    // wait for image to load and display marks
+    renderMarks();
+    // done
+    focus();
+    return;
+}
+
+
+function display(detail) {
+    // redisplay the page
+    if (! detail) {
+	detail = 9;
+    }
+    var queryString = getAllParameters(detail);
+    location.href = location.protocol + "//" + location.host + location.pathname + "?" + queryString;
+}
+
+
+/* **********************************************
+ *     interactive digilib functions
+ * ******************************************** */
+
+
+function renderMarks() {
+    // put the visible marks on the image
+    var mark_count = dlMarks.length;
+    // make shure the image is loaded so we know its size
+    if (defined(picElem.complete) && picElem.complete == false && ! browserType.isN4 ) {
+	setTimeout("renderMarks()", 100);
+    } else {
+	dlTrafo = parseTrafo(picElem);
+	for (var i = 0; i < 8; i++) {
+	    var me = getElement("dot"+i);
+	    if (i < mark_count) {
+		if (dlArea.containsPosition(dlMarks[i])) {
+		    var mpos = dlTrafo.transform(dlMarks[i]);
+		    // suboptimal to place -5 pixels and not half size of mark-image
+		    mpos.x = mpos.x -5;
+		    mpos.y = mpos.y -5;
+		    moveElement(me, mpos);
+		    showElement(me, true);
+		}
+	    } else {
+		// hide the other marks
+		showElement(me, false);
+	    }
+	}
+    }
+}
+
+
+function setMark() {
+    // add a mark where clicked
+    if ( dlMarks.length > 7 ) {
+	alert("Only 8 marks are possible at the moment!");
+	return;
+    }
+
+    function markEvent(evt) {
+	// event handler adding a new mark
+	unregisterMouseDown(elemScaler, markEvent);
+	var p = dlTrafo.invtransform(evtPosition(evt));
+	addMark(p);
+	display();
+    }
+
+    // starting event capture
+    registerMouseDown(elemScaler, markEvent);
+}
+
+
+function zoomArea() {
+    var click = 1;
+    var pt1, pt2;
+    var eck1pos, eck2pos, eck3pos, eck4pos;
+    window.focus();
+    var eck1 = getElement("eck1");
+    var eck2 = getElement("eck2");
+    var eck3 = getElement("eck3");
+    var eck4 = getElement("eck4");
+
+    function zoomClick(evt) {
+	// mouse click handler
+	if (click == 1) {
+	    // first click -- start moving
+	    click = 2;
+	    pt1 = evtPosition(evt);
+	    pt2 = pt1;
+	    eck1pos = pt1;
+	    eck2pos = new Position(pt1.x - 12, pt1.y);
+	    eck3pos = new Position(pt1.x, pt1.y - 12);
+	    eck4pos = new Position(pt1.y - 12, pt1.y - 12);
+	    moveElement(eck1, eck1pos);
+	    moveElement(eck2, eck2pos);
+	    moveElement(eck3, eck3pos);
+	    moveElement(eck4, eck4pos);
+	    showElement(eck1, true);
+	    showElement(eck2, true);
+	    showElement(eck3, true);
+	    showElement(eck4, true);
+	    registerMouseMove(elemScaler, zoomMove);
+	    registerMouseMove(eck4, zoomMove);
+	} else {
+	    // second click -- end moving
+	    pt2 = evtPosition(evt);
+	    showElement(eck1, false);
+	    showElement(eck2, false);
+	    showElement(eck3, false);
+	    showElement(eck4, false);
+	    unregisterMouseMove(elemScaler, zoomMove);
+	    unregisterMouseMove(eck4, zoomMove);
+	    unregisterMouseDown(elemScaler, zoomClick);
+	    unregisterMouseDown(eck4, zoomClick);
+	    var p1 = dlTrafo.invtransform(pt1);
+	    var p2 = dlTrafo.invtransform(pt2);
+	    var ww = p2.x-p1.x;
+	    var wh = p2.y-p1.y;
+	    if ((ww > 0)&&(wh > 0)) {
+		setParameter("wx", cropFloat(p1.x));
+		setParameter("wy", cropFloat(p1.y));
+		setParameter("ww", cropFloat(ww));
+		setParameter("wh", cropFloat(wh));
+		parseArea();
+		// zoomed is always fit
+		setParameter("ws", 1);
+		display();
+	    }
+	}
+    }
+
+    function zoomMove(evt) {
+	// mouse move handler
+	pt2 = evtPosition(evt);
+	// restrict marks to move right and down
+	eck1pos = pt1;
+	eck2pos = new Position(Math.max(pt1.x, pt2.x)-12, pt1.y);
+	eck3pos = new Position(pt1.x, Math.max(pt1.y, pt2.y)-12);
+	eck4pos = new Position(Math.max(pt1.x, pt2.x)-12, Math.max(pt1.y, pt2.y)-12);
+	moveElement(eck1, eck1pos);
+	moveElement(eck2, eck2pos);
+	moveElement(eck3, eck3pos);
+	moveElement(eck4, eck4pos);
+    }
+
+    // starting event capture
+    registerMouseDown(elemScaler, zoomClick);
+    registerMouseDown(eck4, zoomClick);
+}
+
+var ZOOMFACTOR = Math.sqrt(2);
+
+function zoomBy(factor) {
+    // zooms by the given factor
+    var newarea = dlArea;
+    newarea.width /= factor;
+    newarea.height /= factor;
+    newarea.x -= 0.5 * (newarea.width - dlArea.width);
+    newarea.y -= 0.5 * (newarea.height - dlArea.height);
+    newarea = dlMaxArea.fit(newarea);
+    setParamFromArea(newarea);
+    display();
+}
+
+
+function zoomFullpage() {
+    // zooms out to show the whole image
+    setParameter("wx", 0.0);
+    setParameter("wy", 0.0);
+    setParameter("ww", 1.0);
+    setParameter("wh", 1.0);
+    display();
+}
+
+
+function moveCenter() {
+    // move visible area so that it's centered around the clicked point
+    if ( (dlArea.width == 1.0) && (dlArea.height == 1.0) ) {
+	// noting to do
+	return;
+    }
+    window.focus();
+
+    function moveCenterEvent(evt) {
+	// move to handler
+	unregisterMouseDown(elemScaler, moveCenterEvent);
+	var pt = dlTrafo.invtransform(evtPosition(evt));
+	var newarea = new Rectangle(pt.x-0.5*dlArea.width, pt.y-0.5*dlArea.height, dlArea.width, dlArea.height);
+	newarea = dlMaxArea.fit(newarea);
+	// set parameters
+	setParamFromArea(newarea);
+	parseArea();
+	display();
+    }
+
+    // starting event capture
+    registerMouseDown(elemScaler, moveCenterEvent);
+}
+
+
+function removeMark() {
+    // remove the last mark
+    deleteMark();
+    renderMarks();
+}
+
+
+function getRef(select) {
+    // returns a reference to the current digilib set
+    if (! baseUrl) {
+	var baseUrl = location.protocol + "//" + location.host + location.pathname;
+    }
+    var hyperlinkRef = baseUrl;
+    var par = getAllParameters(9);
+    if (par.length > 0) {
+	hyperlinkRef += "?" + par;
+    }
+    return hyperlinkRef;
+}