ICODE-ADC/lammps
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implement command completion popup

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This commit is contained in:
Axel Kohlmeyer
2023-09-01 02:43:32 -04:00
parent 156ab0b338
commit b6d10d1e20
7 changed files with 195 additions and 4 deletions
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71
tools/lammps-gui/codeeditor.cpp
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@ -15,6 +15,7 @@
#include "lammpsgui.h"
#include "linenumberarea.h"
#include <QAbstractItemView>
#include <QAction>
#include <QDesktopServices>
#include <QDragEnterEvent>
@ -25,7 +26,9 @@
#include <QMimeData>
#include <QPainter>
#include <QRegularExpression>
#include <QScrollBar>
#include <QSettings>
#include <QStringListModel>
#include <QTextBlock>
#include <QUrl>
@ -42,8 +45,8 @@ static std::vector<std::string> split_line(const std::string &text)
std::size_t beg = 0;
std::size_t len = 0;
std::size_t add = 0;
char c = *buf;
char c = *buf;
while (c) { // leading whitespace
if (c == ' ' || c == '\t' || c == '\r' || c == '\n' || c == '\f') {
c = *++buf;
@ -115,7 +118,8 @@ static std::vector<std::string> split_line(const std::string &text)
return list;
}
CodeEditor::CodeEditor(QWidget *parent) : QPlainTextEdit(parent), highlight(NO_HIGHLIGHT)
CodeEditor::CodeEditor(QWidget *parent) :
QPlainTextEdit(parent), command_completer(nullptr), highlight(NO_HIGHLIGHT)
{
help_action = new QShortcut(QKeySequence::fromString("Ctrl+?"), parent);
connect(help_action, &QShortcut::activated, this, &CodeEditor::get_help);
@ -269,14 +273,64 @@ QString CodeEditor::reformatLine(const QString &line)
return newtext;
}
void CodeEditor::setCommandList(const QStringList &words)
{
delete command_completer;
command_completer = new QCompleter(this);
command_completer->setModel(new QStringListModel(words, command_completer));
command_completer->setCompletionMode(QCompleter::PopupCompletion);
command_completer->setModelSorting(QCompleter::CaseInsensitivelySortedModel);
command_completer->setWidget(this);
command_completer->setWrapAround(false);
QObject::connect(command_completer, QOverload<const QString &>::of(&QCompleter::activated),
this, &CodeEditor::insertCompletedCommand);
reformatCurrentLine();
}
void CodeEditor::keyPressEvent(QKeyEvent *event)
{
if (command_completer && command_completer->popup()->isVisible()) {
// The following keys are forwarded by the completer to the widget
switch (event->key()) {
case Qt::Key_Enter:
case Qt::Key_Return:
case Qt::Key_Escape:
case Qt::Key_Tab:
case Qt::Key_Backtab:
event->ignore();
return; // let the completer do default behavior
default:
break;
}
}
if (event->key() == Qt::Key_Tab) {
reformatCurrentLine();
return;
}
if (event->key() == Qt::Key_Backtab) {
fprintf(stderr, "Shift + Tab key hit\n");
if (command_completer) {
auto cursor = textCursor();
auto line = cursor.block().text().trimmed();
if (line.isEmpty()) return;
auto words = split_line(line.toStdString());
cursor.select(QTextCursor::WordUnderCursor);
// if on first word, try to complete command
if ((words.size() > 0) && (words[0] == cursor.selectedText().toStdString())) {
// no completion on comment lines
if (words[0][0] == '#') return;
command_completer->setCompletionPrefix(words[0].c_str());
auto popup = command_completer->popup();
QRect cr = cursorRect();
cr.setWidth(popup->sizeHintForColumn(0) +
popup->verticalScrollBar()->sizeHint().width());
popup->setAlternatingRowColors(true);
command_completer->setCurrentRow(0);
command_completer->complete(cr);
}
}
return;
}
QPlainTextEdit::keyPressEvent(event);
@ -425,6 +479,17 @@ void CodeEditor::reformatCurrentLine()
}
}
void CodeEditor::insertCompletedCommand(const QString &completion)
{
if (command_completer->widget() != this) return;
auto cursor = textCursor();
int extra = completion.length() - command_completer->completionPrefix().length();
cursor.movePosition(QTextCursor::Left);
cursor.movePosition(QTextCursor::EndOfWord);
cursor.insertText(completion.right(extra));
setTextCursor(cursor);
}
void CodeEditor::get_help()
{
QString page, help;