static final int MAX_HEIGHT = 300;

static final int ICON_SIZE = 16;

/** The completion list generated by ASTGenerator */

final private JList<CompletionCandidate> completionList;

/** The popup menu in which the suggestion list is shown */

final private JPopupMenu popupMenu;

/** Partial word that triggered the code completion */

final private String subWord;

/** Position where the completion has to be inserted */

final private int caretPos;

/** Scroll pane in which the completion list is displayed */

final private JScrollPane scrollPane;

protected JavaEditor editor;

static protected final int MOUSE_COMPLETION = 10;

static protected final int KEYBOARD_COMPLETION = 20;

static public ImageIcon classIcon;

static public ImageIcon fieldIcon;

static public ImageIcon methodIcon;

static public ImageIcon localIcon;

static private final Map<String, String> iconColors = new HashMap<>();

static private final Map<String, ImageIcon> iconCache = new HashMap<>();

static Color selectionBgColor;

static Color textColor;

/**

public CompletionPanel(JavaEditor editor, int caret, String subWord,

DefaultListModel<CompletionCandidate> items,

Point location) {

this.editor = editor;

this.caretPos = caret;

if (subWord.indexOf('.') != -1 && subWord.indexOf('.') != subWord.length()-1) {

this.subWord = subWord.substring(subWord.lastIndexOf('.') + 1);

} else {

this.subWord = subWord;

}

// more like initTheme(), but using this for consistency

updateTheme();

popupMenu = new JPopupMenu();

popupMenu.setOpaque(false); // why? [fry 220803]

// setting border null just makes it use the default 2px border

popupMenu.setBorder(new EmptyBorder(0, 0, 0, 0));

scrollPane = new JScrollPane();

completionList = new JList<>(items) {

{

setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

setSelectedIndex(0);

addMouseListener(new MouseAdapter() {

@Override

public void mouseClicked(MouseEvent e) {

if (e.getClickCount() == 2) {

insertSelection(MOUSE_COMPLETION);

setInvisible();

}

}

});

setCellRenderer(new CustomListRenderer());

setFocusable(false);

setFont(Toolkit.getSansFont(12, Font.PLAIN));

}

};

scrollPane.setViewportView(completionList);

// remove an ugly multi-line border around it

scrollPane.setBorder(null);

popupMenu.add(scrollPane, BorderLayout.CENTER);

Dimension pref = completionList.getPreferredSize();

popupMenu.setPopupSize(pref.width + classIcon.getIconWidth(),

Math.min(pref.height + 2, MAX_HEIGHT));

popupMenu.setFocusable(false);

// TODO: Update JavaDoc to completionList.getSelectedValue()

JavaTextArea textarea = editor.getJavaTextArea();

popupMenu.show(textarea, location.x, textarea.getBaseline(0, 0) + location.y);

//log("Suggestion shown: " + System.currentTimeMillis());

}

/**

static private ImageIcon renderIcon(File dir, String word) {

String hexColor = Theme.get("editor.completion." + word + ".color");

String cacheColor = iconColors.getOrDefault(word, null);

if (!hexColor.equals(cacheColor)) {

ImageIcon icon =

Toolkit.renderIcon(new File(dir, word + ".svg"), hexColor, ICON_SIZE);

iconColors.put(word, hexColor);

iconCache.put(word, icon);

}

return iconCache.get(word);

}

/**

private void updateTheme() {

Mode mode = editor.getMode();

File dir = new File(mode.getFolder(), "theme/completion");

classIcon = renderIcon(dir, "class");

fieldIcon = renderIcon(dir, "field");

localIcon = renderIcon(dir, "local");

methodIcon = renderIcon(dir, "method");

selectionBgColor = new Color(0xffF0F0F0);

textColor = new Color(0xff222222);

}

public boolean isVisible() {

return popupMenu.isVisible();

}

public void setInvisible() {

popupMenu.setVisible(false);

}

/**

protected boolean insertSelection(int completionSource) {

if (completionList.getSelectedValue() != null) {

try {

// If user types 'abc.', sub word becomes '.' and null is returned

String currentSubWord = fetchCurrentSubWord();

int currentSubWordLen =

(currentSubWord == null) ? 0 : currentSubWord.length();

String selectedSuggestion =

completionList.getSelectedValue().getCompletionString();

if (currentSubWord != null) {

selectedSuggestion = selectedSuggestion.substring(currentSubWordLen);

} else {

currentSubWord = "";

}

String completionString =

completionList.getSelectedValue().getCompletionString();

if (selectedSuggestion.endsWith(" )")) { // the case of single param methods

// selectedSuggestion = ")";

if (completionString.endsWith(" )")) {

completionString =

completionString.substring(0, completionString.length() - 2) + ")";

}

}

boolean mouseClickOnOverloadedMethods = false;

if (completionSource == MOUSE_COMPLETION) {

// The case of overloaded methods, displayed as 'foo(...)'

// They have completion strings as 'foo('. See #2755

if (completionString.endsWith("(")) {

mouseClickOnOverloadedMethods = true;

}

}

JavaTextArea textArea = editor.getJavaTextArea();

Messages.err(subWord + " <= sub word, Inserting suggestion=> " +

selectedSuggestion + " Current sub: " + currentSubWord);

if (currentSubWord.length() > 0) {

textArea.getDocument().remove(caretPos - currentSubWordLen,

currentSubWordLen);

}

textArea.getDocument().insertString(caretPos - currentSubWordLen,

completionString, null);

if (selectedSuggestion.endsWith(")") && !selectedSuggestion.endsWith("()")) {

// place the caret between '( and first ','

int x = selectedSuggestion.indexOf(',');

if (x == -1) {

// the case of single param methods, containing no ','

textArea.setCaretPosition(textArea.getCaretPosition() - 1); // just before ')'

} else {

textArea.setCaretPosition(caretPos + x);

}

}

// https://github.com/processing/processing/issues/2755

if (!completionList.getSelectedValue().getLabel().contains("...")) {

setInvisible();

}

if (mouseClickOnOverloadedMethods) {

((JavaTextArea) editor.getTextArea()).fetchPhrase();

}

return true;

} catch (Exception e) {

e.printStackTrace();

}

setInvisible();

}

return false;

}

private String fetchCurrentSubWord() {

JEditTextArea ta = editor.getTextArea();

int off = ta.getCaretPosition();

//log2("off " + off);

if (off < 0)

return null;

int line = ta.getCaretLine();

if (line < 0)

return null;

String s = ta.getLineText(line);

int x = ta.getCaretPosition() - ta.getLineStartOffset(line) - 1, x1 = x - 1;

if (x >= s.length() || x < 0)

return null; //TODO: Does this check cause problems? Verify.

Messages.log(" x char: " + s.charAt(x));

String word = String.valueOf(s.charAt(x));

if (s.trim().length() == 1) {

word = word.trim();

if (word.endsWith("."))

word = word.substring(0, word.length() - 1);

return word;

}

// If user types 'abc.', sub word becomes '.'

if (word.equals(".")) return null;

int i = 0;

while (true) {

i++;

//TODO: currently works on single line only. "a. <new line> b()" won't be detected

if (x1 >= 0) {

if (Character.isLetterOrDigit(s.charAt(x1)) || s.charAt(x1) == '_') {

word = s.charAt(x1--) + word;

} else {

break;

}

} else {

break;

}

if (i > 200) {

// time out!

break;

}

}

if (Character.isDigit(word.charAt(0)))

return null;

word = word.trim();

if (word.endsWith(".")) {

word = word.substring(0, word.length() - 1);

}

return word;

}

/**

protected void moveUp() {

if (completionList.getSelectedIndex() == 0) {

scrollPane.getVerticalScrollBar().setValue(scrollPane.getVerticalScrollBar().getMaximum());

selectIndex(completionList.getModel().getSize() - 1);

} else {

int index = Math.max(completionList.getSelectedIndex() - 1, 0);

selectIndex(index);

int step = scrollPane.getVerticalScrollBar().getMaximum()

/ completionList.getModel().getSize();

scrollPane.getVerticalScrollBar().setValue(scrollPane

.getVerticalScrollBar()

.getValue()

- step);

// TODO: update JavaDoc to completionList.getSelectedValue()

}

}

/**

protected void moveDown() {

if (completionList.getSelectedIndex() == completionList.getModel().getSize() - 1) {

scrollPane.getVerticalScrollBar().setValue(0);

selectIndex(0);

} else {

int index = Math.min(completionList.getSelectedIndex() + 1,

completionList.getModel().getSize() - 1);

selectIndex(index);

// TODO: update JavaDoc to completionList.getSelectedValue()

int step = scrollPane.getVerticalScrollBar().getMaximum() / completionList.getModel().getSize();

scrollPane.getVerticalScrollBar().setValue(scrollPane.getVerticalScrollBar().getValue() + step);

}

}

private void selectIndex(int index) {

completionList.setSelectedIndex(index);

}

/**

private static class CustomListRenderer extends javax.swing.DefaultListCellRenderer {

public Component getListCellRendererComponent(JList<?> list, Object value,

int index,

boolean isSelected,

boolean cellHasFocus) {

JLabel label = (JLabel) super.getListCellRendererComponent(list, value,

index,

isSelected,

cellHasFocus);

if (isSelected) {

label.setBackground(selectionBgColor);

}

label.setForeground(textColor);

if (value instanceof CompletionCandidate) {

CompletionCandidate cc = (CompletionCandidate) value;

switch (cc.getType()) {

case CompletionCandidate.LOCAL_VAR:

label.setIcon(localIcon);

break;

case CompletionCandidate.LOCAL_FIELD:

case CompletionCandidate.PREDEF_FIELD:

label.setIcon(fieldIcon);

break;

case CompletionCandidate.LOCAL_METHOD:

case CompletionCandidate.PREDEF_METHOD:

label.setIcon(methodIcon);

break;

case CompletionCandidate.LOCAL_CLASS:

case CompletionCandidate.PREDEF_CLASS:

label.setIcon(classIcon);

break;

default:

Messages.log("(CustomListRenderer)Unknown CompletionCandidate type " + cc.getType());

break;

}

} else {

Messages.log("(CustomListRenderer)Unknown CompletionCandidate object " + value);

}

return label;

}

}