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233
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1 /* Copyright (C) 2003,2004 WTWG Uni Bern and others
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2
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3 This program is free software; you can redistribute it and/or
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4 modify it under the terms of the GNU General Public License
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5 as published by the Free Software Foundation; either version 2
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6 of the License, or (at your option) any later version.
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7
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8 This program is distributed in the hope that it will be useful,
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9 but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 GNU General Public License for more details.
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12
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13 You should have received a copy of the GNU General Public License
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14 along with this program; if not, write to the Free Software
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15 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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16
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17 Authors: ROC 3.5.2004
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18 first version by Christian Luginbuehl, 01.05.2003
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19 Changed for digiLib in Zope by DW 24.03.2004
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20
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21 Requires baselib.js !
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22
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23 */
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24
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25 var dlScriptVersion = "0.9a1";
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26
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27 /*
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28 * more parameter handling
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29 */
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30
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31 var dlArea = new Rectangle(0.0, 0.0, 1.0, 1.0);
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32 var dlMaxArea = new Rectangle(0.0, 0.0, 1.0, 1.0);
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33
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34 function parseArea() {
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35 // returns area Rectangle from current parameters
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36 return new Rectangle(getParameter("wx"), getParameter("wy"), getParameter("ww"), getParameter("wh"));
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37 }
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38
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39 function setParamFromArea(rect) {
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40 // sets digilib wx etc. from rect
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41 setParameter("wx", cropFloat(rect.x));
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42 setParameter("wy", cropFloat(rect.y));
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43 setParameter("ww", cropFloat(rect.width));
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44 setParameter("wh", cropFloat(rect.height));
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45 return true;
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46 }
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47
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48 var dlTrafo = new Transform();
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49
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50 function parseTrafo(elem) {
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51 // returns Transform from current dlArea and picsize
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52 var picsize = getElementRect(elem);
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53 var trafo = new Transform();
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54 // subtract area offset and size
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55 trafo.concat(getTranslation(new Position(-dlArea.x, -dlArea.y)));
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56 trafo.concat(getScale(new Size(1/dlArea.width, 1/dlArea.height)));
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57 // scale to screen size
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58 trafo.concat(getScale(picsize));
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59 trafo.concat(getTranslation(picsize));
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60 // rotate
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61 //trafo.concat(getRotation(- getParameter("rot"), new Position(0.5*picsize.width, 0.5*picsize.height)));
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62 // mirror
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63 //if (hasFlag("hmir")) {
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64 //trafo.m00 = - trafo.m00;
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65 //}
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66 //if (hasFlag("vmir")) {
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67 //trafo.m11 = - trafo.m11;
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68 //}
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69 return trafo;
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70 }
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71
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72
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73 var dlMarks = new Array();
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74
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75 function parseMarks() {
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76 // returns marks array from current parameters
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77 var marks = new Array();
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78 var ma;
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79 var mk = getParameter("mk");
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80 if (mk.indexOf(";") >= 0) {
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81 // old format with ";"
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82 ma = mk.split(";");
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83 } else {
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84 ma = mk.split(",");
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85 }
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86 for (var i = 0; i < ma.length ; i++) {
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87 var pos = ma[i].split("/");
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88 if (pos.length > 1) {
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89 marks.push(new Position(pos[0], pos[1]));
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90 }
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91 }
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92 return marks;
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93 }
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94
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95 function getAllMarks() {
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96 // returns a string with all marks in query format
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97 var marks = new Array();
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98 for (var i = 0; i < dlMarks.length; i++) {
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99 marks.push(cropFloat(dlMarks[i].x) + "/" + cropFloat(dlMarks[i].y));
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100 }
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101 return marks.join(",");
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102 }
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103
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104 function addMark(pos) {
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105 // add a mark
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106 dlMarks.push(pos);
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107 setParameter("mk", getAllMarks());
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108 return true;
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109 }
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110
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111 function deleteMark() {
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112 // delete the last mark
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113 dlMarks.pop();
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114 setParameter("mk", getAllMarks());
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115 return true;
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116 }
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117
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118 var dlFlags = new Object();
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119
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120 function hasFlag(mode) {
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121 // returns if mode flag is set
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122 return (dlFlags[mode]);
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123 }
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124
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125 function addFlag(mode) {
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126 // add a mode flag
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127 dlFlags[mode] = mode;
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128 return true;
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129 }
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130
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131 function removeFlag(mode) {
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132 // remove a mode flag
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133 if (dlFlags[mode]) {
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134 delete dlFlags[mode];
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135 }
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136 return true;
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137 }
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138
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139 function toggleFlag(mode) {
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140 // change a mode flag
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141 if (dlFlags[mode]) {
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142 delete dlFlags[mode];
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143 } else {
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144 dlFlags[mode] = mode;
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145 }
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146 return true;
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147 }
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148
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149 function getAllFlags() {
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150 // returns a string with all flags in query format
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151 var fa = new Array();
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152 for (var f in dlFlags) {
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153 if ((f != "")&&(dlFlags[f] != null)) {
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154 fa.push(f);
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155 }
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156 }
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157 return fa.join(",");
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158 }
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159
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160 function parseFlags() {
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161 // sets dlFlags from the current parameters
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162 var flags = new Object();
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163 var fa = getParameter("mo").split(",");
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164 for (var i = 0; i < fa.length ; i++) {
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165 var f = fa[i];
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166 if (f != "") {
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167 flags[f] = f;
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168 }
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169 }
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170 return flags;
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171 }
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172
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173
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174 function bestPicSize(elem, inset) {
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175 // returns a Size with the best image size for the given element
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176 if (! defined(inset)) {
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177 inset = 25;
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178 }
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179 var ws = getWinSize();
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180 var es = getElementPosition(elem);
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181 if (es) {
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182 ws.width = ws.width - es.x - inset;
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183 ws.height = ws.height - es.y - inset;
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184 }
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185 return ws;
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186 }
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187
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188
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189 /* **********************************************
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190 * digilib specific routines
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191 * ******************************************** */
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192
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193 var elemScaler = null;
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194 var picElem = null;
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195
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234
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196
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197 function dl_param_init() {
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198 // parameter initialisation before onload
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199
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200 // put the query parameters (sans "?") in the parameters array
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201 parseParameters(location.search.slice(1));
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202 // treat special parameters
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203 dlMarks = parseMarks();
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204 dlArea = parseArea();
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205 dlFlags = parseFlags();
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206 }
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207
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208
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233
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209 function dl_init() {
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234
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210 // initalisation on load
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233
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211 elemScaler = getElement("scaler", true);
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212 picElem = getElement("pic", true);
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213 if (picElem == null && elemScaler) {
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214 // in N4 pic is in the scaler layer
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215 picElem = elemScaler.document.images[0];
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216 }
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217 if ((!elemScaler)||(!picElem)) {
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218 alert("Sorry, zogilib doesn't work here!");
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219 return false;
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220 }
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221 // give a name to the window containing digilib
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222 if (defined(dlTarget)&&(dlTarget)) {
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223 window.name = dlTarget;
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224 } else {
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225 window.name = "digilib";
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226 }
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227 // put the query parameters (sans "?") in the parameters array
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228 parseParameters(location.search.slice(1));
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229 // treat special parameters
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230 dlMarks = parseMarks();
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231 dlArea = parseArea();
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232 dlFlags = parseFlags();
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233 // wait for image to load and display marks
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234 renderMarks();
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235 // done
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236 focus();
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237 return;
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238 }
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239
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240
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241 function display(detail) {
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242 // redisplay the page
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243 if (! detail) {
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244 detail = 9;
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245 }
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246 var queryString = getAllParameters(detail);
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247 location.href = location.protocol + "//" + location.host + location.pathname + "?" + queryString;
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248 }
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249
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250
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251 /* **********************************************
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252 * interactive digilib functions
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253 * ******************************************** */
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254
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255
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256 function renderMarks() {
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257 // put the visible marks on the image
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258 var mark_count = dlMarks.length;
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259 // make shure the image is loaded so we know its size
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260 if (defined(picElem.complete) && picElem.complete == false && ! browserType.isN4 ) {
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261 setTimeout("renderMarks()", 100);
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262 } else {
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263 dlTrafo = parseTrafo(picElem);
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264 for (var i = 0; i < 8; i++) {
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265 var me = getElement("dot"+i);
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266 if (i < mark_count) {
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267 if (dlArea.containsPosition(dlMarks[i])) {
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268 var mpos = dlTrafo.transform(dlMarks[i]);
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269 // suboptimal to place -5 pixels and not half size of mark-image
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270 mpos.x = mpos.x -5;
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271 mpos.y = mpos.y -5;
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272 moveElement(me, mpos);
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273 showElement(me, true);
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274 }
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275 } else {
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276 // hide the other marks
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277 showElement(me, false);
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278 }
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279 }
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280 }
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281 }
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282
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283
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284 function setMark() {
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285 // add a mark where clicked
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286 if ( dlMarks.length > 7 ) {
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287 alert("Only 8 marks are possible at the moment!");
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288 return;
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289 }
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290
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291 function markEvent(evt) {
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292 // event handler adding a new mark
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293 unregisterMouseDown(elemScaler, markEvent);
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294 var p = dlTrafo.invtransform(evtPosition(evt));
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295 addMark(p);
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296 display();
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297 }
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298
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299 // starting event capture
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300 registerMouseDown(elemScaler, markEvent);
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301 }
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302
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303
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304 function zoomArea() {
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305 var click = 1;
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306 var pt1, pt2;
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307 var eck1pos, eck2pos, eck3pos, eck4pos;
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308 window.focus();
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309 var eck1 = getElement("eck1");
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310 var eck2 = getElement("eck2");
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311 var eck3 = getElement("eck3");
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312 var eck4 = getElement("eck4");
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313
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314 function zoomClick(evt) {
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315 // mouse click handler
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316 if (click == 1) {
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317 // first click -- start moving
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318 click = 2;
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319 pt1 = evtPosition(evt);
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320 pt2 = pt1;
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321 eck1pos = pt1;
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322 eck2pos = new Position(pt1.x - 12, pt1.y);
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323 eck3pos = new Position(pt1.x, pt1.y - 12);
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324 eck4pos = new Position(pt1.y - 12, pt1.y - 12);
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325 moveElement(eck1, eck1pos);
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326 moveElement(eck2, eck2pos);
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327 moveElement(eck3, eck3pos);
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328 moveElement(eck4, eck4pos);
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329 showElement(eck1, true);
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330 showElement(eck2, true);
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331 showElement(eck3, true);
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332 showElement(eck4, true);
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333 registerMouseMove(elemScaler, zoomMove);
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334 registerMouseMove(eck4, zoomMove);
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335 } else {
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336 // second click -- end moving
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337 pt2 = evtPosition(evt);
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338 showElement(eck1, false);
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339 showElement(eck2, false);
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340 showElement(eck3, false);
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341 showElement(eck4, false);
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342 unregisterMouseMove(elemScaler, zoomMove);
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343 unregisterMouseMove(eck4, zoomMove);
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344 unregisterMouseDown(elemScaler, zoomClick);
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345 unregisterMouseDown(eck4, zoomClick);
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346 var p1 = dlTrafo.invtransform(pt1);
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347 var p2 = dlTrafo.invtransform(pt2);
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348 var ww = p2.x-p1.x;
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349 var wh = p2.y-p1.y;
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350 if ((ww > 0)&&(wh > 0)) {
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351 setParameter("wx", cropFloat(p1.x));
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352 setParameter("wy", cropFloat(p1.y));
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353 setParameter("ww", cropFloat(ww));
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354 setParameter("wh", cropFloat(wh));
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355 parseArea();
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356 // zoomed is always fit
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357 setParameter("ws", 1);
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358 display();
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359 }
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360 }
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361 }
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362
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363 function zoomMove(evt) {
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364 // mouse move handler
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365 pt2 = evtPosition(evt);
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366 // restrict marks to move right and down
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367 eck1pos = pt1;
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368 eck2pos = new Position(Math.max(pt1.x, pt2.x)-12, pt1.y);
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369 eck3pos = new Position(pt1.x, Math.max(pt1.y, pt2.y)-12);
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370 eck4pos = new Position(Math.max(pt1.x, pt2.x)-12, Math.max(pt1.y, pt2.y)-12);
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371 moveElement(eck1, eck1pos);
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372 moveElement(eck2, eck2pos);
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373 moveElement(eck3, eck3pos);
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374 moveElement(eck4, eck4pos);
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375 }
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376
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377 // starting event capture
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378 registerMouseDown(elemScaler, zoomClick);
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379 registerMouseDown(eck4, zoomClick);
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380 }
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381
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382 var ZOOMFACTOR = Math.sqrt(2);
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383
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384 function zoomBy(factor) {
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385 // zooms by the given factor
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386 var newarea = dlArea;
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387 newarea.width /= factor;
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388 newarea.height /= factor;
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389 newarea.x -= 0.5 * (newarea.width - dlArea.width);
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390 newarea.y -= 0.5 * (newarea.height - dlArea.height);
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391 newarea = dlMaxArea.fit(newarea);
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392 setParamFromArea(newarea);
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393 display();
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394 }
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395
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396
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397 function zoomFullpage() {
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398 // zooms out to show the whole image
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399 setParameter("wx", 0.0);
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400 setParameter("wy", 0.0);
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401 setParameter("ww", 1.0);
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402 setParameter("wh", 1.0);
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403 display();
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404 }
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405
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406
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407 function moveCenter() {
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408 // move visible area so that it's centered around the clicked point
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409 if ( (dlArea.width == 1.0) && (dlArea.height == 1.0) ) {
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410 // noting to do
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411 return;
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412 }
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413 window.focus();
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414
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415 function moveCenterEvent(evt) {
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416 // move to handler
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417 unregisterMouseDown(elemScaler, moveCenterEvent);
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418 var pt = dlTrafo.invtransform(evtPosition(evt));
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419 var newarea = new Rectangle(pt.x-0.5*dlArea.width, pt.y-0.5*dlArea.height, dlArea.width, dlArea.height);
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420 newarea = dlMaxArea.fit(newarea);
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421 // set parameters
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422 setParamFromArea(newarea);
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423 parseArea();
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424 display();
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425 }
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426
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427 // starting event capture
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428 registerMouseDown(elemScaler, moveCenterEvent);
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429 }
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430
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431
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432 function removeMark() {
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433 // remove the last mark
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434 deleteMark();
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435 renderMarks();
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436 }
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437
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438
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234
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439 function getRef() {
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233
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440 // returns a reference to the current digilib set
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441 if (! baseUrl) {
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442 var baseUrl = location.protocol + "//" + location.host + location.pathname;
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443 }
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444 var hyperlinkRef = baseUrl;
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445 var par = getAllParameters(9);
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446 if (par.length > 0) {
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447 hyperlinkRef += "?" + par;
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448 }
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449 return hyperlinkRef;
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450 }
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