From 256438e18288ad4655297f6109bb8bfa752e53ae Mon Sep 17 00:00:00 2001
From: jakubvrana <jakubvrana@7c3ca157-0c34-0410-bff1-cbf682f78f5c>
Date: Sat, 4 Aug 2007 19:40:58 +0000
Subject: [PATCH] Set vertical lines only once

git-svn-id: https://adminer.svn.sourceforge.net/svnroot/adminer/trunk@300 7c3ca157-0c34-0410-bff1-cbf682f78f5c
---
 schema.inc.php | 53 +++++++++++++++++++++++++++++++-------------------
 1 file changed, 33 insertions(+), 20 deletions(-)

diff --git a/schema.inc.php b/schema.inc.php
index f02c94b0..6c9b652f 100644
--- a/schema.inc.php
+++ b/schema.inc.php
@@ -13,6 +13,7 @@ $top = 0;
 $base_left = -1;
 $schema = array();
 $referenced = array();
+$lefts = array();
 $result = $mysql->query("SHOW TABLE STATUS");
 while ($row = $result->fetch_assoc()) {
 	if (!isset($row["Engine"])) { // view
@@ -35,11 +36,12 @@ while ($row = $result->fetch_assoc()) {
 					$left = $base_left;
 					$base_left -= .1;
 				}
-				while ($schema[$row["Name"]]["references"][$val["table"]][10000 * $left] || $referenced[$val["table"]][$row["Name"]][10000 * $left]) {
+				while ($lefts[(string) $left]) {
 					$left -= .0001;
 				}
-				$schema[$row["Name"]]["references"][$val["table"]][10000 * $left] = array_combine($val["source"], $val["target"]);
-				$referenced[$val["table"]][$row["Name"]][10000 * $left] = $val["target"];
+				$schema[$row["Name"]]["references"][$val["table"]][(string) $left] = array_combine($val["source"], $val["target"]);
+				$referenced[$val["table"]][$row["Name"]][(string) $left] = $val["target"];
+				$lefts[(string) $left] = true;
 			}
 		}
 	}
@@ -64,25 +66,36 @@ document.onmousemove = function (ev) {
 		var left = (ev.clientX - x) / em;
 		var top = (ev.clientY - y) / em;
 		var divs = that.getElementsByTagName('div');
+		var line_set = { };
 		for (var i=0; i < divs.length; i++) {
 			if (divs[i].className == 'references') {
 				var ref = (table_pos[divs[i].title] ? table_pos[divs[i].title] : [ 0, 0 ]);
-				var left1 = Math.min(0, ref[1] - left) - 1;
-				divs[i].style.left = left1 + 'em';
-				divs[i].getElementsByTagName('div')[0].style.width = -left1 + 'em';
 				var div2 = document.getElementById((divs[i].id.substr(0, 4) == 'refs' ? 'refd' : 'refs') + divs[i].id.substr(4));
-				var left2 = Math.min(0, left - ref[1]) - 1;
-				div2.style.left = left2 + 'em';
-				div2.getElementsByTagName('div')[0].style.width = -left2 + 'em';
-				var is_top = (divs[i].offsetTop + top * em < div2.offsetTop + ref[0] * em);
-				var div2 = document.getElementById(divs[i].id.replace(/^....(.+)-[0-9]+$/, 'refl$1'));
-				var shift = ev.clientY - y - that.offsetTop;
-				div2.style.left = (left + left1) + 'em';
-				if (is_top) {
-					div2.style.top = (div2.offsetTop + shift) / em + 'em';
+				var left1 = -1;
+				var is_top = true;
+				var id = divs[i].id.replace(/^ref.(.+)-.+/, '$1');
+				if (divs[i].parentNode != div2.parentNode) {
+					left1 = Math.min(0, ref[1] - left) - 1;
+					divs[i].style.left = left1 + 'em';
+					divs[i].getElementsByTagName('div')[0].style.width = -left1 + 'em';
+					var left2 = Math.min(0, left - ref[1]) - 1;
+					div2.style.left = left2 + 'em';
+					div2.getElementsByTagName('div')[0].style.width = -left2 + 'em';
+					is_top = (divs[i].offsetTop + top * em < div2.offsetTop + ref[0] * em);
+				}
+				if (!line_set[id]) {
+					var line = document.getElementById(divs[i].id.replace(/^....(.+)-[0-9]+$/, 'refl$1'));
+					var shift = ev.clientY - y - that.offsetTop;
+					line.style.left = (left + left1) + 'em';
+					if (is_top) {
+						line.style.top = (line.offsetTop + shift) / em + 'em';
+					}
+					if (divs[i].parentNode != div2.parentNode) {
+						line = line.getElementsByTagName('div')[0];
+						line.style.height = (line.offsetHeight + (is_top ? -1 : 1) * shift) / em + 'em';
+					}
+					line_set[id] = true;
 				}
-				div2 = div2.getElementsByTagName('div')[0];
-				div2.style.height = (div2.offsetHeight + (is_top ? -1 : 1) * shift) / em + 'em';
 			}
 		}
 		that.style.left = left + 'em';
@@ -125,7 +138,7 @@ foreach ($schema as $name => $table) {
 	}
 	foreach ((array) $table["references"] as $target_name => $refs) {
 		foreach ($refs as $left => $columns) {
-			$left1 = $left / 10000 - $table_pos[$name][1];
+			$left1 = $left - $table_pos[$name][1];
 			$i = 0;
 			foreach ($columns as $source => $target) {
 				echo '<div class="references" title="' . htmlspecialchars($target_name) . "\" id='refs$left-" . ($i++) . "' style='left: $left1" . "em; top: " . $table["fields"][$source]["pos"] . "em; padding-top: .5em;'><div style='border-top: 1px solid Gray; width: " . (-$left1) . "em;'></div></div>\n";
@@ -134,7 +147,7 @@ foreach ($schema as $name => $table) {
 	}
 	foreach ((array) $referenced[$name] as $target_name => $refs) {
 		foreach ($refs as $left => $columns) {
-			$left1 = $left / 10000 - $table_pos[$name][1];
+			$left1 = $left - $table_pos[$name][1];
 			$i = 0;
 			foreach ($columns as $target) {
 				echo '<div class="references" title="' . htmlspecialchars($target_name) . "\" id='refd$left-" . ($i++) . "' style='left: $left1" . "em; top: " . $table["fields"][$target]["pos"] . "em; width: " . (-$left) . "em; height: 1.25em; background: url(arrow.gif) no-repeat right center;'><div style='height: .5em; border-bottom: 1px solid Gray; width: " . (-$left1) . "em;'></div></div>\n";
@@ -154,7 +167,7 @@ foreach ($schema as $name => $table) {
 				$min_pos = min($min_pos, $pos1, $pos2);
 				$max_pos = max($max_pos, $pos1, $pos2);
 			}
-			echo "<div class='references' id='refl$left' style='left: " . ($left / 10000) . "" . "em; top: $min_pos" . "em; padding: .5em 0;' /><div style='border-right: 1px solid Gray; height: " . ($max_pos - $min_pos) . "em;'></div></div>\n";
+			echo "<div class='references' id='refl$left' style='left: $left" . "em; top: $min_pos" . "em; padding: .5em 0;' /><div style='border-right: 1px solid Gray; height: " . ($max_pos - $min_pos) . "em;'></div></div>\n";
 		}
 	}
 }