created Console::wrapText() to imrove console help output on small screens

framework/CHANGELOG.md

@@ -7,6 +7,8 @@ Yii Framework 2 Change Log
 - Bug #7529: Fixed `yii\web\Response::sendContentAsFile()` that was broken in 2.0.3 (samdark)
 - Enh #7488: Added `StringHelper::explode` to perform explode with trimming and skipping of empty elements (SilverFire, nineinchnick, creocoder, samdark)
 - Enh #7562: `yii help` now lists all sub-commands by default (callmez)
+- Enh: Added `yii\helper\Console::wrapText()` method to wrap indented text by console window width and used it in `yii help` command (cebe)
+
 
 2.0.3 March 01, 2015
 --------------------

framework/console/controllers/HelpController.php

@@ -210,7 +210,8 @@ class HelpController extends Controller
             }
             foreach ($commands as $command => $description) {
                 $this->stdout('- ' . $this->ansiFormat($command, Console::FG_YELLOW));
-                $this->stdout(str_repeat(' ', $len + 5 - strlen($command)) . $description);
+                $this->stdout(str_repeat(' ', $len + 4 - strlen($command)));
+                $this->stdout(Console::wrapText($description, $len + 4 + 2), Console::BOLD);
                 $this->stdout("\n");
 
                 $result = Yii::$app->createController($command);
@@ -228,7 +229,8 @@ class HelpController extends Controller
                             }
                             $summary = $controller->getActionHelpSummary($controller->createAction($action));
                             if ($summary !== '') {
-                                $this->stdout(str_repeat(' ', $len + 5 - strlen($string)) . $summary);
+                                $this->stdout(str_repeat(' ', $len + 4 - strlen($string)));
+                                $this->stdout(Console::wrapText($summary, $len + 4 + 2));
                             }
                             $this->stdout("\n");
                         }
@@ -263,14 +265,24 @@ class HelpController extends Controller
         if (!empty($actions)) {
             $this->stdout("\nSUB-COMMANDS\n\n", Console::BOLD);
             $prefix = $controller->getUniqueId();
+
+            $maxlen = 5;
+            foreach ($actions as $action) {
+                $len = strlen($prefix.'/'.$action) + 2 + ($action === $controller->defaultAction ? 10 : 0);
+                if ($maxlen < $len) {
+                    $maxlen = $len;
+                }
+            }
             foreach ($actions as $action) {
                 $this->stdout('- ' . $this->ansiFormat($prefix.'/'.$action, Console::FG_YELLOW));
+                $len = strlen($prefix.'/'.$action) + 2;
                 if ($action === $controller->defaultAction) {
                     $this->stdout(' (default)', Console::FG_GREEN);
+                    $len += 10;
                 }
                 $summary = $controller->getActionHelpSummary($controller->createAction($action));
                 if ($summary !== '') {
-                    $this->stdout(': ' . $summary);
+                    $this->stdout(str_repeat(' ', $maxlen - $len + 2) . Console::wrapText($summary, $maxlen + 2));
                 }
                 $this->stdout("\n");
             }

framework/helpers/BaseConsole.php

@@ -635,6 +635,46 @@ class BaseConsole
         return $size = false;
     }
 
+    /**
+     * Word wrap text with indentation to fit the screen size
+     *
+     * If screen size could not be detected, or the indentation is greater than the screen size, the text will not be wrapped.
+     *
+     * The first line will **not** be indented, so `Console::wrapText("Lorem ipsum dolor sit amet.", 4)` will result in the
+     * following output, given the screen width is 16 characters:
+     *
+     * ```
+     * Lorem ipsum
+     *     dolor sit
+     *     amet.
+     * ```
+     *
+     * @param string $text the text to be wrapped
+     * @param integer $indent number of spaces to use for indentation.
+     * @param boolean $refresh whether to force refresh of screen size.
+     * This will be passed to [[getScreenSize()]].
+     * @return string the wrapped text.
+     * @since 2.0.3
+     */
+    public static function wrapText($text, $indent = 0, $refresh = false)
+    {
+        $size = static::getScreenSize($refresh);
+        if ($size === false || $size[0] <= $indent) {
+            return $text;
+        }
+        $pad = str_repeat(' ', $indent);
+        $lines = explode("\n", wordwrap($text, $size[0] - $indent, "\n", true));
+        $first = true;
+        foreach($lines as $i => $line) {
+            if ($first) {
+                $first = false;
+                continue;
+            }
+            $lines[$i] = $pad . $line;
+        }
+        return implode("\n", $lines);
+    }
+
     /**
      * Gets input from STDIN and returns a string right-trimmed for EOLs.
      *