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Wrapping words longer than box width #3

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Wrapping words longer than box width #3

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98 changes: 80 additions & 18 deletions src/Box.php
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Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,9 @@ class Box
*/
protected $textShadow = false;

/** @var string */
protected $wordSeparator = '-';

/**
* @var array
*/
Expand All @@ -69,6 +72,14 @@ public function __construct(&$image)
$this->fontColor = new Color(0, 0, 0);
}

/**
* @param string $wordSeparator
*/
public function setWordSeparator($wordSeparator)
{
$this->wordSeparator = $wordSeparator;
}

/**
* @param Color $color Font color
*/
Expand Down Expand Up @@ -181,21 +192,9 @@ public function draw($text)

$lines = array();
// Split text explicitly into lines by \n, \r\n and \r
$explicitLines = preg_split('/\n|\r\n?/', $text);
$explicitLines = $this->getExplicitLines($text);
foreach ($explicitLines as $line) {
// Check every line if it needs to be wrapped
$words = explode(" ", $line);
$line = $words[0];
for ($i = 1; $i < count($words); $i++) {
$box = $this->calculateBox($line." ".$words[$i]);
if (($box[4]-$box[6]) >= $this->box['width']) {
$lines[] = $line;
$line = $words[$i];
} else {
$line .= " ".$words[$i];
}
}
$lines[] = $line;
$lines = $this->mergeArrayValues($lines, $this->splitLine($line));
}

if ($this->debug) {
Expand All @@ -211,7 +210,7 @@ public function draw($text)

$lineHeightPx = $this->lineHeight * $this->fontSize;
$textHeight = count($lines) * $lineHeightPx;

switch ($this->alignY) {
case 'center':
$yAlign = ($this->box['height'] / 2) - ($textHeight / 2);
Expand All @@ -223,7 +222,7 @@ public function draw($text)
default:
$yAlign = 0;
}

$n = 0;
foreach ($lines as $line) {
$box = $this->calculateBox($line);
Expand All @@ -244,7 +243,7 @@ public function draw($text)
// current line X and Y position
$xMOD = $this->box['x'] + $xAlign;
$yMOD = $this->box['y'] + $yAlign + $yShift + ($n * $lineHeightPx);

if ($this->debug) {
// Marks current line with color
$this->drawFilledRectangle(
Expand All @@ -255,7 +254,7 @@ public function draw($text)
new Color(rand(1, 180), rand(1, 180), rand(1, 180))
);
}

if ($this->textShadow !== false) {
$this->drawInternal(
$xMOD + $this->textShadow['x'],
Expand All @@ -276,6 +275,54 @@ public function draw($text)
}
}

protected function getExplicitLines($text)
{
return preg_split('/\n|\r\n?/', $text);
}

protected function splitLine($text)
{
$lines = [];
$lineWords = [];
$words = explode(" ", $text);
do {
$word = array_shift($words);
$lineWords[] = $word;
if ($this->getTextWidth(implode(' ', $lineWords)) < $this->box['width']) {
continue;
} else {
if (count($lineWords) == 1) {
list($line, $rest) = $this->splitWord($lineWords[0]);
$lines[] = $line;
array_unshift($words, $rest);
} else {
$last = array_pop($lineWords);
array_unshift($words, $last);
$lines[] = implode(' ', $lineWords);
}
$lineWords = [];
}
} while (count($words));
$lines[] = implode(' ', $lineWords);
return $lines;
}

protected function splitWord($word)
{
if ($this->getTextWidth($word) <= $this->box['width']) {
return [$word, ''];
} else {
$characters = str_split($word);
$length = count($characters);
do {
$length--;
$line = implode('', array_slice($characters, 0, $length)) . $this->wordSeparator;
} while($this->getTextWidth($line) > $this->box['width']);
$rest = implode('', array_slice($characters, $length));
return [$line, $rest];
}
}

protected function getFontSizeInPoints()
{
return 0.75 * $this->fontSize;
Expand All @@ -293,6 +340,12 @@ protected function calculateBox($text)
return imageftbbox($this->getFontSizeInPoints(), 0, $this->fontFace, $text);
}

protected function getTextWidth($text)
{
$box = $this->calculateBox($text);
return $box[4]-$box[6];
}

protected function drawInternal($x, $y, Color $color, $text)
{
imagefttext(
Expand All @@ -306,4 +359,13 @@ protected function drawInternal($x, $y, Color $color, $text)
$text
);
}

protected function mergeArrayValues($array1, $array2)
{
foreach ($array2 as $value) {
$array1[] = $value;
}
return $array1;
}

}