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1
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2 package nabble.view.lib;
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3
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4 import java.io.IOException;
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5 import java.io.PrintWriter;
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6 import javax.servlet.http.HttpServletRequest;
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7 import javax.servlet.http.HttpServletResponse;
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8
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9
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10 // used outside nabble, so do not use Init
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11 public final class HtmlViewUtils {
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12
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13 private HtmlViewUtils() {} // never
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14
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15
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16 /** Number of pages to be displayed before/after the current page*/
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17 public static final int NEIGHBOR_PAGES = 3;
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18
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19 public static interface PagingPath {
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20 public String path(int row);
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21 }
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22
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23 public static final class GenericPagingPath implements PagingPath {
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24 private final String url;
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25
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26 public GenericPagingPath(String url) {
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27 this.url = url;
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28 }
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29
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30 public String path(int row) {
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31 return url + (row==0 ? "" : "&i=" + row);
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32 }
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33 }
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34
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35 public static void genericPaging(HttpServletRequest request,HttpServletResponse response, int count, int currentRecord, int maxRows, PagingPath pagingPath, String margins)
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36 throws IOException
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37 {
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38 genericPaging(request, response, count, currentRecord, maxRows, pagingPath, margins, false, NEIGHBOR_PAGES);
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39 }
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40
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41 public static void genericPaging(HttpServletRequest request,HttpServletResponse response, int count, int currentRecord, int maxRows, PagingPath pagingPath, String margins, boolean hideLastPage,int NEIGHBOR_PAGES)
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42 throws IOException
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43 {
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44 PrintWriter out = response.getWriter();
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45 if (count > maxRows) {
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46
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47 out.print( "\r\n<style type=\"text/css\">\r\n span.page { padding: .1em .3em }\r\n span.current-page { border-width:1px; border-style:solid; }\r\n</style>\r\n<span style=\"float:right;white-space:nowrap;padding:" );
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48 out.print( (margins) );
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49 out.print( ";font-weight:normal\">\r\n " );
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50
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51 int currentPage = (currentRecord / maxRows) + 1;
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52 int lastPage = count / maxRows;
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53 // If there are more items on the next page...
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54 if (count % maxRows > 0)
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55 lastPage++; // ... I increment the last page.
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56
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57 int before = currentPage - NEIGHBOR_PAGES;
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58 int after = currentPage + NEIGHBOR_PAGES;
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59 if (before <= 1) {
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60 // Among the first pages
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61 int limit = Math.min(currentPage + NEIGHBOR_PAGES, lastPage);
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62
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63 for (int i = 1; i <= limit; i++) {
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64 if (i == currentPage) {
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65
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66 out.print( "\r\n<span class=\"current-page page medium-border-color\">" );
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67 out.print( (i) );
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68 out.print( "</span>\r\n" );
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69
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70 } else {
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71 int page = (i-1) * maxRows;
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72
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73 out.print( "\r\n <span class=\"page\">\r\n <a href=\"" );
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74 out.print( (pagingPath.path(page)) );
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75 out.print( "\" title=\"page " );
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76 out.print( (i) );
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77 out.print( "\">" );
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78 out.print( (i) );
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79 out.print( "</a>\r\n </span>\r\n" );
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80
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81 }
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82 }
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83
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84 if (limit < lastPage) {
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85 int page = (lastPage-1) * maxRows;
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86 boolean atEnd = after == lastPage-1;
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87
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88 out.print( "\r\n" );
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89 out.print( (atEnd? "" : "...") );
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90 out.print( "\r\n" );
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91 if (!hideLastPage || atEnd) {
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92 out.print( "\r\n<span class=\"page\">\r\n <a href=\"" );
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93 out.print( (pagingPath.path(page)) );
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94 out.print( "\" title=\"page " );
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95 out.print( (lastPage) );
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96 out.print( "\"" );
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97 out.print( (atEnd? "" : " rel=\"nofollow\"") );
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98 out.print( ">" );
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99 out.print( (lastPage) );
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100 out.print( "</a>\r\n</span>\r\n" );
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101 }
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102 out.print( "\r\n" );
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103
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104 }
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105 } else if (before > 1 && after < lastPage) {
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106 // In the middle pages
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107
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108 out.print( "\r\n<span class=\"page\">\r\n <a href=\"" );
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109 out.print( (pagingPath.path(0)) );
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110 out.print( "\" title=\"page 1\">1</a>\r\n</span>\r\n" );
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111 out.print( (before == 2? "" : "...") );
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112 out.print( "\r\n" );
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113
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114 int limit = before + 2 * NEIGHBOR_PAGES;
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115 for (int i = before; i <= limit; i++) {
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116 if (i == currentPage) {
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117
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118 out.print( "<span class=\"current-page page medium-border-color\">" );
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119 out.print( (i) );
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120 out.print( "</span>" );
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121
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122 } else {
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123 int page = (i-1) * maxRows;
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124
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125 out.print( "\r\n <span class=\"page\">\r\n <a href=\"" );
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126 out.print( (pagingPath.path(page)) );
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127 out.print( "\" title=\"page " );
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128 out.print( (i) );
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129 out.print( "\">" );
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130 out.print( (i) );
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131 out.print( "</a>\r\n </span>\r\n" );
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132
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133 }
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134 }
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135
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136 if (limit < lastPage) {
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137 int page = (lastPage-1) * maxRows;
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138 boolean atEnd = after == lastPage-1;
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139
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140 out.print( "\r\n" );
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141 out.print( (atEnd? "" : "...") );
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142 out.print( "\r\n" );
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143 if (!hideLastPage || atEnd) {
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144 out.print( "\r\n<span class=\"page\">\r\n <a href=\"" );
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145 out.print( (pagingPath.path(page)) );
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146 out.print( "\" title=\"page " );
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147 out.print( (lastPage) );
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148 out.print( "\"" );
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149 out.print( (atEnd? "" : " rel=\"nofollow\"") );
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150 out.print( ">" );
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151 out.print( (lastPage) );
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152 out.print( "</a>\r\n</span>\r\n" );
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153 }
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154 out.print( "\r\n" );
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155
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156 }
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157 } else {
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158 // Among the last pages
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159
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160 out.print( "\r\n<span class=\"page\">\r\n <a href=\"" );
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161 out.print( (pagingPath.path(0)) );
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162 out.print( "\" title=\"page 1\">1</a>\r\n</span>\r\n" );
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163 out.print( (before == 2? "" : "...") );
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164 out.print( "\r\n" );
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165
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166 for (int i = before; i <= lastPage; i++) {
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167 if (i == currentPage) {
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168
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169 out.print( "<span class=\"current-page page medium-border-color\">" );
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170 out.print( (i) );
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171 out.print( "</span>" );
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172
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173 } else {
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174 int page = (i-1) * maxRows;
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175
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176 out.print( "\r\n <span class=\"page\">\r\n <a href=\"" );
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177 out.print( (pagingPath.path(page)) );
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178 out.print( "\" title=\"page " );
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179 out.print( (i) );
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180 out.print( "\">" );
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181 out.print( (i) );
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182 out.print( "</a>\r\n </span>\r\n" );
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183
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184 }
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185 }
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186 }
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187
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188 out.print( "\r\n</span>\r\n" );
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189
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190 }
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191 }
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192
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193 public static void googleAnalytics(PrintWriter out) {
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194
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195 out.print( "\r\n<script>\r\n (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){\r\n (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),\r\n m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)\r\n })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');\r\n \r\n ga('create', 'UA-91855-9', 'auto', 'nabble');\r\n ga('nabble.send', 'pageview');\r\n</script>\r\n" );
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196
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197 }
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198
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199 }
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200
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