diff options
Diffstat (limited to 'application')
| -rw-r--r-- | application/service/files.php | 38 | ||||
| -rw-r--r-- | application/test/tests/test_service_files.php | 32 |
2 files changed, 70 insertions, 0 deletions
diff --git a/application/service/files.php b/application/service/files.php index c53448eb6..8f7595c50 100644 --- a/application/service/files.php +++ b/application/service/files.php @@ -95,6 +95,44 @@ class files { self::add_file_callback($id, $file, $filename); } + /** + * Ellipsize text to be at max $max_lines lines long. If the last line is + * not complete (strlen($text) < $filesize), drop it so that every line of + * the returned text is complete. If there is only one line, return that + * line as is and add the ellipses at the end. + * + * @param text Text to add ellipses to + * @param max_lines Number of lines the returned text should contain + * @param filesize size of the original file where the text comes from + * @return ellipsized text + */ + static public function ellipsize($text, $max_lines, $filesize) + { + $lines = explode("\n", $text); + $orig_len = strlen($text); + $orig_linecount = count($lines); + + if ($orig_linecount > 1) { + if ($orig_len < $filesize) { + // ensure we have a full line at the end + $lines = array_slice($lines, 0, -1); + } + + if (count($lines) > $max_lines) { + $lines = array_slice($lines, 0, $max_lines); + } + + if (count($lines) != $orig_linecount) { + // only add elipses when we drop at least one line + $lines[] = "..."; + } + } elseif ($orig_len < $filesize) { + $lines[count($lines) - 1] .= " ..."; + } + + return implode("\n", $lines); + } + static public function add_uploaded_file($id, $file, $filename) { self::add_file_callback($id, $file, $filename); diff --git a/application/test/tests/test_service_files.php b/application/test/tests/test_service_files.php index 21688230f..401ddbe86 100644 --- a/application/test/tests/test_service_files.php +++ b/application/test/tests/test_service_files.php @@ -80,6 +80,38 @@ class test_service_files extends \test\Test { } } + public function test_ellipsize() + { + $a1 = "abc"; + $a2 = "abc\nabc"; + $a3 = "abc\nabc\nabc"; + $a4 = "abc\nabc\nabc\nabc"; + + $this->t->is(\service\files::ellipsize($a1, 1, strlen($a1)), + $a1, "Trim 1 line to 1, no change"); + + $this->t->is(\service\files::ellipsize($a3, 3, strlen($a3)), + $a3, "Trim 3 lines to 3, no change"); + + $this->t->is(\service\files::ellipsize($a3, 5, strlen($a3)), + $a3, "Trim 3 lines to 5, no change"); + + $this->t->is(\service\files::ellipsize($a2, 1, strlen($a2)), + "$a1\n...", "Trim 2 lines to 1, drop one line"); + + $this->t->is(\service\files::ellipsize($a3, 2, strlen($a3)), + "$a2\n...", "Trim 3 lines to 2, drop one line"); + + $this->t->is(\service\files::ellipsize($a4, 2, strlen($a4)), + "$a2\n...", "Trim 4 lines to 2, drop 2 lines"); + + $this->t->is(\service\files::ellipsize($a3, 3, strlen($a3) + 1), + "$a2\n...", "Last line incomplete, drop one line"); + + $this->t->is(\service\files::ellipsize($a1, 5, strlen($a1) + 1), + "$a1 ...", "Single line incomplete, only add dots"); + } + } |