CliMenu::selectFirstItem() - Code Metrics - Inspection of "Split item with builder" - php-school/cli-menu - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#127)

by Aydin

created 2018-05-14 07:01 UTC

CliMenu::selectFirstItem() A

↳ Parent: CliMenu

Complexity

Conditions	3
Paths	3

Size

Total Lines	9
Code Lines	5

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	9
rs	9.6666
c	0
b	0
f	0
cc	3
eloc	5
nc	3
nop	0

<?php

namespace PhpSchool\CliMenu;

use PhpSchool\CliMenu\Dialogue\NumberInput;
use PhpSchool\CliMenu\Exception\InvalidInstantiationException;
use PhpSchool\CliMenu\Exception\InvalidTerminalException;
use PhpSchool\CliMenu\Exception\MenuNotOpenException;
use PhpSchool\CliMenu\Input\InputIO;
use PhpSchool\CliMenu\Input\Number;
use PhpSchool\CliMenu\Input\Password;
use PhpSchool\CliMenu\Input\Text;
use PhpSchool\CliMenu\MenuItem\LineBreakItem;
use PhpSchool\CliMenu\MenuItem\MenuItemInterface;
use PhpSchool\CliMenu\MenuItem\SplitItem;
use PhpSchool\CliMenu\MenuItem\StaticItem;
use PhpSchool\CliMenu\Dialogue\Confirm;
use PhpSchool\CliMenu\Dialogue\Flash;
use PhpSchool\CliMenu\Terminal\TerminalFactory;
use PhpSchool\CliMenu\Util\StringUtil as s;
use PhpSchool\Terminal\Exception\NotInteractiveTerminal;
use PhpSchool\Terminal\InputCharacter;
use PhpSchool\Terminal\NonCanonicalReader;
use PhpSchool\Terminal\Terminal;
use PhpSchool\Terminal\TerminalReader;

/**
 * @author Michael Woodward <[email protected]>
 */
class CliMenu
{
    /**
     * @var Terminal
     */
    protected $terminal;

    /**
     * @var MenuStyle
     */
    protected $style;

    /**
     * @var ?string
     */
    protected $title;

    /**
     * @var MenuItemInterface[]
     */
    protected $items = [];

    /**
     * @var int
     */
    protected $selectedItem;

    /**
     * @var bool
     */
    protected $open = false;

    /**
     * @var CliMenu|null
     */
    protected $parent;

    /**
     * @var array
     */
    protected $defaultControlMappings = [
        '^P' => InputCharacter::UP,
        'k'  => InputCharacter::UP,
        '^K' => InputCharacter::DOWN,
        'j'  => InputCharacter::DOWN,
        "\r" => InputCharacter::ENTER,
        ' '  => InputCharacter::ENTER,
        'l'  => InputCharacter::LEFT,
        'm'  => InputCharacter::RIGHT,
    ];

    /**
     * @var array
     */
    protected $customControlMappings = [];

    /**
     * @var Frame
     */
    private $currentFrame;

    public function __construct(
        ?string $title,
        array $items,
        Terminal $terminal = null,
        MenuStyle $style = null
    ) {
        $this->title      = $title;
        $this->items      = $items;
        $this->terminal   = $terminal ?: TerminalFactory::fromSystem();
        $this->style      = $style ?: new MenuStyle($this->terminal);

        $this->selectFirstItem();
    }

    /**
     * Configure the terminal to work with CliMenu
     */
    protected function configureTerminal() : void
    {
        $this->assertTerminalIsValidTTY();

        $this->terminal->disableCanonicalMode();
        $this->terminal->disableEchoBack();
        $this->terminal->disableCursor();
        $this->terminal->clear();
    }

    /**
     * Revert changes made to the terminal
     */
    protected function tearDownTerminal() : void
    {
        $this->terminal->restoreOriginalConfiguration();
        $this->terminal->enableCursor();
    }

    private function assertTerminalIsValidTTY() : void
    {
        if (!$this->terminal->isInteractive()) {
            throw new InvalidTerminalException('Terminal is not interactive (TTY)');
        }
    }


    public function setParent(CliMenu $parent) : void
    {
        $this->parent = $parent;
    }

    public function getParent() : ?CliMenu
    {
        return $this->parent;
    }

    public function getTerminal() : Terminal
    {
        return $this->terminal;
    }

    public function isOpen() : bool
    {
        return $this->open;
    }

    /**
     * Add a new Item to the menu
     */
    public function addItem(MenuItemInterface $item) : void
    {
        $this->items[] = $item;

        if (count($this->items) === 1) {
            $this->selectFirstItem();
        }
    }

    /**
     * Add multiple Items to the menu
     */
    public function addItems(array $items) : void
    {
        foreach ($items as $item) {
            $this->items[] = $item;
        }

        if (count($this->items) === count($items)) {
            $this->selectFirstItem();
        }
    }

    /**
     * Set Items of the menu
     */
    public function setItems(array $items) : void
    {
        $this->items = $items;

        $this->selectFirstItem();
    }

    /**
     * Set the selected pointer to the first selectable item
     */
    private function selectFirstItem() : void
    {
        foreach ($this->items as $key => $item) {
            if ($item->canSelect()) {
                $this->selectedItem = $key;
                break;
            }
        }
    }

    /**
     * Adds a custom control mapping
     */
    public function addCustomControlMapping(string $input, callable $callable) : void
    {
        if (isset($this->defaultControlMappings[$input]) || isset($this->customControlMappings[$input])) {
            throw new \InvalidArgumentException('Cannot rebind this input');
        }

        $this->customControlMappings[$input] = $callable;
    }

    /**
     * Shorthand function to add multiple custom control mapping at once
     */
    public function addCustomControlMappings(array $map) : void
    {
        foreach ($map as $input => $callable) {
            $this->addCustomControlMapping($input, $callable);
        }
    }

    /**
     * Removes a custom control mapping
     */
    public function removeCustomControlMapping(string $input) : void
    {
        if (!isset($this->customControlMappings[$input])) {
            throw new \InvalidArgumentException('This input is not registered');
        }

        unset($this->customControlMappings[$input]);
    }

    /**
     * Display menu and capture input
     */
    private function display() : void
    {
        $this->draw();

        $reader = new NonCanonicalReader($this->terminal);
        $reader->addControlMappings($this->defaultControlMappings);

        while ($this->isOpen() && $char = $reader->readCharacter()) {
            if (!$char->isHandledControl()) {
                $rawChar = $char->get();
                if (isset($this->customControlMappings[$rawChar])) {
                    $this->customControlMappings[$rawChar]($this);
                }
                continue;
            }

            switch ($char->getControl()) {
                case InputCharacter::UP:
                case InputCharacter::DOWN:
                    $this->moveSelectionVertically($char->getControl());
                    $this->draw();
                    break;
                case InputCharacter::LEFT:
                case InputCharacter::RIGHT:
                    $this->moveSelectionHorizontally($char->getControl());
                    $this->draw();
                    break;
                case InputCharacter::ENTER:
                    $this->executeCurrentItem();
                    break;
            }
        }
    }

    /**
     * Move the selection in a given direction, up / down
     */
    protected function moveSelectionVertically(string $direction) : void
    {
        $itemKeys = array_keys($this->items);

        do {
            $direction === 'UP'
                ? $this->selectedItem--
                : $this->selectedItem++;

            if (!array_key_exists($this->selectedItem, $this->items)) {
                $this->selectedItem  = $direction === 'UP'
                    ? end($itemKeys)
                    : reset($itemKeys);
            }
        } while (!$this->canSelect());
    }

    /**
     * Move the selection in a given direction, left / right
     */
    protected function moveSelectionHorizontally(string $direction) : void
    {
        if (!$this->items[$this->selectedItem] instanceof SplitItem) {
            return;
        }

        /** @var SplitItem $item */
        $item = $this->items[$this->selectedItem];
        $itemKeys = array_keys($item->getItems());
        $selectedItemIndex = $item->getSelectedItemIndex();

        do {
            $direction === 'LEFT'
                ? $selectedItemIndex--
                : $selectedItemIndex++;

            if (!array_key_exists($selectedItemIndex, $item->getItems())) {
                $selectedItemIndex = $direction === 'LEFT'
                    ? end($itemKeys)
                    : reset($itemKeys);
            }
        } while (!$item->canSelectIndex($selectedItemIndex));
        
        $item->setSelectedItemIndex($selectedItemIndex);
    }

    /**
     * Can the currently selected item actually be selected?
     *
     * For example:
     *  selectable item -> yes
     *  static item -> no
     *  split item with only static items -> no
     *  split item with at least one selectable item -> yes
     *
     * @return bool
     */
    private function canSelect() : bool
    {
        return $this->items[$this->selectedItem]->canSelect();
    }

    /**
     * Retrieve the item the user actually selected
     *
     */
    public function getSelectedItem() : MenuItemInterface
    {
        $item = $this->items[$this->selectedItem];
        return $item instanceof SplitItem
            ? $item->getSelectedItem()
            : $item;
    }

    /**
     * Execute the current item
     */
    protected function executeCurrentItem() : void
    {
        $item = $this->getSelectedItem();

        if ($item->canSelect()) {
            $callable = $item->getSelectAction();
            $callable($this);
        }
    }

    /**
     * If true we clear the whole terminal screen, useful
     * for example when reducing the width of the menu, to not
     * leave leftovers of the previous wider menu.
     *
     * Redraw the menu
     */
    public function redraw(bool $clear = false) : void
    {
        if ($clear) {
            $this->terminal->clear();
        }

        $this->assertOpen();
        $this->draw();
    }

    private function assertOpen() : void
    {
        if (!$this->isOpen()) {
            throw new MenuNotOpenException;
        }
    }

    /**
     * Draw the menu to STDOUT
     */
    protected function draw() : void
    {
        $frame = new Frame;

        $frame->newLine(2);

        if ($this->style->getBorderTopWidth() > 0) {
            $frame->addRows($this->style->getBorderTopRows());
        }

        if ($this->style->getPaddingTopBottom() > 0) {
            $frame->addRows($this->style->getPaddingTopBottomRows());
        }

        if ($this->title) {
            $frame->addRows($this->drawMenuItem(new StaticItem($this->title)));
            $frame->addRows($this->drawMenuItem(new LineBreakItem($this->style->getTitleSeparator())));
        }

        array_map(function ($item, $index) use ($frame) {
            $frame->addRows($this->drawMenuItem($item, $index === $this->selectedItem));
        }, $this->items, array_keys($this->items));


        if ($this->style->getPaddingTopBottom() > 0) {
            $frame->addRows($this->style->getPaddingTopBottomRows());
        }

        if ($this->style->getBorderBottomWidth() > 0) {
            $frame->addRows($this->style->getBorderBottomRows());
        }

        $frame->newLine(2);

        $this->terminal->moveCursorToTop();
        foreach ($frame->getRows() as $row) {
            if ($row == "\n") {
                $this->terminal->clearLine();
            }
            $this->terminal->write($row);
        }
        $this->terminal->clearDown();

        $this->currentFrame = $frame;
    }

    /**
     * Draw a menu item
     */
    protected function drawMenuItem(MenuItemInterface $item, bool $selected = false) : array
    {
        $rows = $item->getRows($this->style, $selected);
        
        if ($item instanceof SplitItem) {
            $selected = false;
        }

        $invertedColoursSetCode = $selected
            ? $this->style->getInvertedColoursSetCode()
            : '';
        $invertedColoursUnsetCode = $selected
            ? $this->style->getInvertedColoursUnsetCode()
            : '';

        if ($this->style->getBorderLeftWidth() || $this->style->getBorderRightWidth()) {
            $borderColour = $this->style->getBorderColourCode();
        } else {
            $borderColour = '';
        }

        return array_map(function ($row) use ($invertedColoursSetCode, $invertedColoursUnsetCode, $borderColour) {
            return sprintf(
                "%s%s%s%s%s%s%s%s%s%s%s%s\n",
                str_repeat(' ', $this->style->getMargin()),
                $borderColour,
                str_repeat(' ', $this->style->getBorderLeftWidth()),
                $this->style->getColoursSetCode(),
                $invertedColoursSetCode,
                str_repeat(' ', $this->style->getPaddingLeftRight()),
                $row,
                str_repeat(' ', $this->style->getRightHandPadding(mb_strlen(s::stripAnsiEscapeSequence($row)))),
                $invertedColoursUnsetCode,
                $borderColour,
                str_repeat(' ', $this->style->getBorderRightWidth()),
                $this->style->getColoursResetCode()
            );
        }, $rows);
    }

    /**
     * @throws InvalidTerminalException
     */
    public function open() : void
    {
        if ($this->isOpen()) {
            return;
        }

        $this->configureTerminal();
        $this->open = true;
        $this->display();
    }

    /**
     * Close the menu
     *
     * @throws InvalidTerminalException
     */
    public function close() : void
    {
        $menu = $this;

        do {
            $menu->closeThis();
            $menu = $menu->getParent();
        } while (null !== $menu);

        $this->tearDownTerminal();
    }

    public function closeThis() : void
    {
        $this->terminal->clean();
        $this->terminal->moveCursorToTop();
        $this->open = false;
    }

    /**
     * @return MenuItemInterface[]
     */
    public function getItems() : array
    {
        return $this->items;
    }

    public function removeItem(MenuItemInterface $item) : void
    {
        $key = array_search($item, $this->items, true);

        if (false === $key) {
            throw new \InvalidArgumentException('Item does not exist in menu');
        }

        unset($this->items[$key]);
        $this->items = array_values($this->items);
    }

    public function getStyle() : MenuStyle
    {
        return $this->style;
    }

    public function getCurrentFrame() : Frame
    {
        return $this->currentFrame;
    }

    public function flash(string $text, MenuStyle $style = null) : Flash
    {
        $this->guardSingleLine($text);

        $style = $style ?? (new MenuStyle($this->terminal))
            ->setBg('yellow')
            ->setFg('red');

        return new Flash($this, $style, $this->terminal, $text);
    }

    public function confirm(string $text, MenuStyle $style = null) : Confirm
    {
        $this->guardSingleLine($text);

        $style = $style ?? (new MenuStyle($this->terminal))
            ->setBg('yellow')
            ->setFg('red');

        return new Confirm($this, $style, $this->terminal, $text);
    }

    public function askNumber(MenuStyle $style = null) : Number
    {
        $this->assertOpen();

        $style = $style ?? (new MenuStyle($this->terminal))
            ->setBg('yellow')
            ->setFg('red');

        return new Number(new InputIO($this, $this->terminal), $style);
    }

    public function askText(MenuStyle $style = null) : Text
    {
        $this->assertOpen();

        $style = $style ?? (new MenuStyle($this->terminal))
            ->setBg('yellow')
            ->setFg('red');

        return new Text(new InputIO($this, $this->terminal), $style);
    }

    public function askPassword(MenuStyle $style = null) : Password
    {
        $this->assertOpen();

        $style = $style ?? (new MenuStyle($this->terminal))
            ->setBg('yellow')
            ->setFg('red');

        return new Password(new InputIO($this, $this->terminal), $style);
    }

    private function guardSingleLine($text) : void
    {
        if (strpos($text, "\n") !== false) {
            throw new \InvalidArgumentException;
        }
    }
}


1			<?php
2
3			namespace PhpSchool\CliMenu;
4
5			use PhpSchool\CliMenu\Dialogue\NumberInput;
6			use PhpSchool\CliMenu\Exception\InvalidInstantiationException;
7			use PhpSchool\CliMenu\Exception\InvalidTerminalException;
8			use PhpSchool\CliMenu\Exception\MenuNotOpenException;
9			use PhpSchool\CliMenu\Input\InputIO;
10			use PhpSchool\CliMenu\Input\Number;
11			use PhpSchool\CliMenu\Input\Password;
12			use PhpSchool\CliMenu\Input\Text;
13			use PhpSchool\CliMenu\MenuItem\LineBreakItem;
14			use PhpSchool\CliMenu\MenuItem\MenuItemInterface;
15			use PhpSchool\CliMenu\MenuItem\SplitItem;
16			use PhpSchool\CliMenu\MenuItem\StaticItem;
17			use PhpSchool\CliMenu\Dialogue\Confirm;
18			use PhpSchool\CliMenu\Dialogue\Flash;
19			use PhpSchool\CliMenu\Terminal\TerminalFactory;
20			use PhpSchool\CliMenu\Util\StringUtil as s;
21			use PhpSchool\Terminal\Exception\NotInteractiveTerminal;
22			use PhpSchool\Terminal\InputCharacter;
23			use PhpSchool\Terminal\NonCanonicalReader;
24			use PhpSchool\Terminal\Terminal;
25			use PhpSchool\Terminal\TerminalReader;
26
27			/**
28			* @author Michael Woodward <[email protected]>
29			*/
30			class CliMenu
31			{
32			/**
33			* @var Terminal
34			*/
35			protected $terminal;
36
37			/**
38			* @var MenuStyle
39			*/
40			protected $style;
41
42			/**
43			* @var ?string
44			*/
45			protected $title;
46
47			/**
48			* @var MenuItemInterface[]
49			*/
50			protected $items = [];
51
52			/**
53			* @var int
54			*/
55			protected $selectedItem;
56
57			/**
58			* @var bool
59			*/
60			protected $open = false;
61
62			/**
63			* @var CliMenu\|null
64			*/
65			protected $parent;
66
67			/**
68			* @var array
69			*/
70			protected $defaultControlMappings = [
71			'^P' => InputCharacter::UP,
72			'k' => InputCharacter::UP,
73			'^K' => InputCharacter::DOWN,
74			'j' => InputCharacter::DOWN,
75			"\r" => InputCharacter::ENTER,
76			' ' => InputCharacter::ENTER,
77			'l' => InputCharacter::LEFT,
78			'm' => InputCharacter::RIGHT,
79			];
80
81			/**
82			* @var array
83			*/
84			protected $customControlMappings = [];
85
86			/**
87			* @var Frame
88			*/
89			private $currentFrame;
90
91			public function __construct(
92			?string $title,
93			array $items,
94			Terminal $terminal = null,
95			MenuStyle $style = null
96			) {
97			$this->title = $title;
98			$this->items = $items;
99			$this->terminal = $terminal ?: TerminalFactory::fromSystem();
100			$this->style = $style ?: new MenuStyle($this->terminal);
101
102			$this->selectFirstItem();
103			}
104
105			/**
106			* Configure the terminal to work with CliMenu
107			*/
108			protected function configureTerminal() : void
109			{
110			$this->assertTerminalIsValidTTY();
111
112			$this->terminal->disableCanonicalMode();
113			$this->terminal->disableEchoBack();
114			$this->terminal->disableCursor();
115			$this->terminal->clear();
116			}
117
118			/**
119			* Revert changes made to the terminal
120			*/
121			protected function tearDownTerminal() : void
122			{
123			$this->terminal->restoreOriginalConfiguration();
124			$this->terminal->enableCursor();
125			}
126
127			private function assertTerminalIsValidTTY() : void
128			{
129			if (!$this->terminal->isInteractive()) {
130			throw new InvalidTerminalException('Terminal is not interactive (TTY)');
131			}
132			}
133
134
135			public function setParent(CliMenu $parent) : void
136			{
137			$this->parent = $parent;
138			}
139
140			public function getParent() : ?CliMenu
141			{
142			return $this->parent;
143			}
144
145			public function getTerminal() : Terminal
146			{
147			return $this->terminal;
148			}
149
150			public function isOpen() : bool
151			{
152			return $this->open;
153			}
154
155			/**
156			* Add a new Item to the menu
157			*/
158			public function addItem(MenuItemInterface $item) : void
159			{
160			$this->items[] = $item;
161
162			if (count($this->items) === 1) {
163			$this->selectFirstItem();
164			}
165			}
166
167			/**
168			* Add multiple Items to the menu
169			*/
170			public function addItems(array $items) : void
171			{
172			foreach ($items as $item) {
173			$this->items[] = $item;
174			}
175
176			if (count($this->items) === count($items)) {
177			$this->selectFirstItem();
178			}
179			}
180
181			/**
182			* Set Items of the menu
183			*/
184			public function setItems(array $items) : void
185			{
186			$this->items = $items;
187
188			$this->selectFirstItem();
189			}
190
191			/**
192			* Set the selected pointer to the first selectable item
193			*/
194			private function selectFirstItem() : void
195			{
196			foreach ($this->items as $key => $item) {
197			if ($item->canSelect()) {
198			$this->selectedItem = $key;
199			break;
200			}
201			}
202			}
203
204			/**
205			* Adds a custom control mapping
206			*/
207			public function addCustomControlMapping(string $input, callable $callable) : void
208			{
209			if (isset($this->defaultControlMappings[$input]) \|\| isset($this->customControlMappings[$input])) {
210			throw new \InvalidArgumentException('Cannot rebind this input');
211			}
212
213			$this->customControlMappings[$input] = $callable;
214			}
215
216			/**
217			* Shorthand function to add multiple custom control mapping at once
218			*/
219			public function addCustomControlMappings(array $map) : void
220			{
221			foreach ($map as $input => $callable) {
222			$this->addCustomControlMapping($input, $callable);
223			}
224			}
225
226			/**
227			* Removes a custom control mapping
228			*/
229			public function removeCustomControlMapping(string $input) : void
230			{
231			if (!isset($this->customControlMappings[$input])) {
232			throw new \InvalidArgumentException('This input is not registered');
233			}
234
235			unset($this->customControlMappings[$input]);
236			}
237
238			/**
239			* Display menu and capture input
240			*/
241			private function display() : void
242			{
243			$this->draw();
244
245			$reader = new NonCanonicalReader($this->terminal);
246			$reader->addControlMappings($this->defaultControlMappings);
247
248			while ($this->isOpen() && $char = $reader->readCharacter()) {
249			if (!$char->isHandledControl()) {
250			$rawChar = $char->get();
251			if (isset($this->customControlMappings[$rawChar])) {
252			$this->customControlMappings[$rawChar]($this);
253			}
254			continue;
255			}
256
257			switch ($char->getControl()) {
258			case InputCharacter::UP:
259			case InputCharacter::DOWN:
260			$this->moveSelectionVertically($char->getControl());
261			$this->draw();
262			break;
263			case InputCharacter::LEFT:
264			case InputCharacter::RIGHT:
265			$this->moveSelectionHorizontally($char->getControl());
266			$this->draw();
267			break;
268			case InputCharacter::ENTER:
269			$this->executeCurrentItem();
270			break;
271			}
272			}
273			}
274
275			/**
276			* Move the selection in a given direction, up / down
277			*/
278			protected function moveSelectionVertically(string $direction) : void
279			{
280			$itemKeys = array_keys($this->items);
281
282			do {
283			$direction === 'UP'
284			? $this->selectedItem--
285			: $this->selectedItem++;
286
287			if (!array_key_exists($this->selectedItem, $this->items)) {
288			$this->selectedItem = $direction === 'UP'
289			? end($itemKeys)
290			: reset($itemKeys);
291			}
292			} while (!$this->canSelect());
293			}
294
295			/**
296			* Move the selection in a given direction, left / right
297			*/
298			protected function moveSelectionHorizontally(string $direction) : void
299			{
300			if (!$this->items[$this->selectedItem] instanceof SplitItem) {
301			return;
302			}
303
304			/** @var SplitItem $item */
305			$item = $this->items[$this->selectedItem];
306			$itemKeys = array_keys($item->getItems());
307			$selectedItemIndex = $item->getSelectedItemIndex();
308
309			do {
310			$direction === 'LEFT'
311			? $selectedItemIndex--
312			: $selectedItemIndex++;
313
314			if (!array_key_exists($selectedItemIndex, $item->getItems())) {
315			$selectedItemIndex = $direction === 'LEFT'
316			? end($itemKeys)
317			: reset($itemKeys);
318			}
319			} while (!$item->canSelectIndex($selectedItemIndex));
320
321			$item->setSelectedItemIndex($selectedItemIndex);
322			}
323
324			/**
325			* Can the currently selected item actually be selected?
326			*
327			* For example:
328			* selectable item -> yes
329			* static item -> no
330			* split item with only static items -> no
331			* split item with at least one selectable item -> yes
332			*
333			* @return bool
334			*/
335			private function canSelect() : bool
336			{
337			return $this->items[$this->selectedItem]->canSelect();
338			}
339
340			/**
341			* Retrieve the item the user actually selected
342			*
343			*/
344			public function getSelectedItem() : MenuItemInterface
345			{
346			$item = $this->items[$this->selectedItem];
347			return $item instanceof SplitItem
348			? $item->getSelectedItem()
349			: $item;
350			}
351
352			/**
353			* Execute the current item
354			*/
355			protected function executeCurrentItem() : void
356			{
357			$item = $this->getSelectedItem();
358
359			if ($item->canSelect()) {
360			$callable = $item->getSelectAction();
361			$callable($this);
362			}
363			}
364
365			/**
366			* If true we clear the whole terminal screen, useful
367			* for example when reducing the width of the menu, to not
368			* leave leftovers of the previous wider menu.
369			*
370			* Redraw the menu
371			*/
372			public function redraw(bool $clear = false) : void
373			{
374			if ($clear) {
375			$this->terminal->clear();
376			}
377
378			$this->assertOpen();
379			$this->draw();
380			}
381
382			private function assertOpen() : void
383			{
384			if (!$this->isOpen()) {
385			throw new MenuNotOpenException;
386			}
387			}
388
389			/**
390			* Draw the menu to STDOUT
391			*/
392			protected function draw() : void
393			{
394			$frame = new Frame;
395
396			$frame->newLine(2);
397
398			if ($this->style->getBorderTopWidth() > 0) {
399			$frame->addRows($this->style->getBorderTopRows());
400			}
401
402			if ($this->style->getPaddingTopBottom() > 0) {
403			$frame->addRows($this->style->getPaddingTopBottomRows());
404			}
405
406			if ($this->title) {
407			$frame->addRows($this->drawMenuItem(new StaticItem($this->title)));
408			$frame->addRows($this->drawMenuItem(new LineBreakItem($this->style->getTitleSeparator())));
409			}
410
411			array_map(function ($item, $index) use ($frame) {
412			$frame->addRows($this->drawMenuItem($item, $index === $this->selectedItem));
413			}, $this->items, array_keys($this->items));
414
415
416			if ($this->style->getPaddingTopBottom() > 0) {
417			$frame->addRows($this->style->getPaddingTopBottomRows());
418			}
419
420			if ($this->style->getBorderBottomWidth() > 0) {
421			$frame->addRows($this->style->getBorderBottomRows());
422			}
423
424			$frame->newLine(2);
425
426			$this->terminal->moveCursorToTop();
427			foreach ($frame->getRows() as $row) {
428			if ($row == "\n") {
429			$this->terminal->clearLine();
430			}
431			$this->terminal->write($row);
432			}
433			$this->terminal->clearDown();
434
435			$this->currentFrame = $frame;
436			}
437
438			/**
439			* Draw a menu item
440			*/
441			protected function drawMenuItem(MenuItemInterface $item, bool $selected = false) : array
442			{
443			$rows = $item->getRows($this->style, $selected);
444
445			if ($item instanceof SplitItem) {
446			$selected = false;
447			}
448
449			$invertedColoursSetCode = $selected
450			? $this->style->getInvertedColoursSetCode()
451			: '';
452			$invertedColoursUnsetCode = $selected
453			? $this->style->getInvertedColoursUnsetCode()
454			: '';
455
456			if ($this->style->getBorderLeftWidth() \|\| $this->style->getBorderRightWidth()) {
457			$borderColour = $this->style->getBorderColourCode();
458			} else {
459			$borderColour = '';
460			}
461
462			return array_map(function ($row) use ($invertedColoursSetCode, $invertedColoursUnsetCode, $borderColour) {
463			return sprintf(
464			"%s%s%s%s%s%s%s%s%s%s%s%s\n",
465			str_repeat(' ', $this->style->getMargin()),
466			$borderColour,
467			str_repeat(' ', $this->style->getBorderLeftWidth()),
468			$this->style->getColoursSetCode(),
469			$invertedColoursSetCode,
470			str_repeat(' ', $this->style->getPaddingLeftRight()),
471			$row,
472			str_repeat(' ', $this->style->getRightHandPadding(mb_strlen(s::stripAnsiEscapeSequence($row)))),
473			$invertedColoursUnsetCode,
474			$borderColour,
475			str_repeat(' ', $this->style->getBorderRightWidth()),
476			$this->style->getColoursResetCode()
477			);
478			}, $rows);
479			}
480
481			/**
482			* @throws InvalidTerminalException
483			*/
484			public function open() : void
485			{
486			if ($this->isOpen()) {
487			return;
488			}
489
490			$this->configureTerminal();
491			$this->open = true;
492			$this->display();
493			}
494
495			/**
496			* Close the menu
497			*
498			* @throws InvalidTerminalException
499			*/
500			public function close() : void
501			{
502			$menu = $this;
503
504			do {
505			$menu->closeThis();
506			$menu = $menu->getParent();
507			} while (null !== $menu);
508
509			$this->tearDownTerminal();
510			}
511
512			public function closeThis() : void
513			{
514			$this->terminal->clean();
515			$this->terminal->moveCursorToTop();
516			$this->open = false;
517			}
518
519			/**
520			* @return MenuItemInterface[]
521			*/
522			public function getItems() : array
523			{
524			return $this->items;
525			}
526
527			public function removeItem(MenuItemInterface $item) : void
528			{
529			$key = array_search($item, $this->items, true);
530
531			if (false === $key) {
532			throw new \InvalidArgumentException('Item does not exist in menu');
533			}
534
535			unset($this->items[$key]);
536			$this->items = array_values($this->items);
537			}
538
539			public function getStyle() : MenuStyle
540			{
541			return $this->style;
542			}
543
544			public function getCurrentFrame() : Frame
545			{
546			return $this->currentFrame;
547			}
548
549			public function flash(string $text, MenuStyle $style = null) : Flash
550			{
551			$this->guardSingleLine($text);
552
553			$style = $style ?? (new MenuStyle($this->terminal))
554			->setBg('yellow')
555			->setFg('red');
556
557			return new Flash($this, $style, $this->terminal, $text);
558			}
559
560			public function confirm(string $text, MenuStyle $style = null) : Confirm
561			{
562			$this->guardSingleLine($text);
563
564			$style = $style ?? (new MenuStyle($this->terminal))
565			->setBg('yellow')
566			->setFg('red');
567
568			return new Confirm($this, $style, $this->terminal, $text);
569			}
570
571			public function askNumber(MenuStyle $style = null) : Number
572			{
573			$this->assertOpen();
574
575			$style = $style ?? (new MenuStyle($this->terminal))
576			->setBg('yellow')
577			->setFg('red');
578
579			return new Number(new InputIO($this, $this->terminal), $style);
580			}
581
582			public function askText(MenuStyle $style = null) : Text
583			{
584			$this->assertOpen();
585
586			$style = $style ?? (new MenuStyle($this->terminal))
587			->setBg('yellow')
588			->setFg('red');
589
590			return new Text(new InputIO($this, $this->terminal), $style);
591			}
592
593			public function askPassword(MenuStyle $style = null) : Password
594			{
595			$this->assertOpen();
596
597			$style = $style ?? (new MenuStyle($this->terminal))
598			->setBg('yellow')
599			->setFg('red');
600
601			return new Password(new InputIO($this, $this->terminal), $style);
602			}
603
604			private function guardSingleLine($text) : void
605			{
606			if (strpos($text, "\n") !== false) {
607			throw new \InvalidArgumentException;
608			}
609			}
610			}
611

php-school / cli-menu

Pull Request — master (#127)

CliMenu::selectFirstItem() A

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