/* Add a character to a command line */
int addChar(wchar_t ** CommandLine, int key, unsigned int *cursorLocation)
{
unsigned int indexToMoveChar = 0;
unsigned int sizeOfCmd = 0;
sizeOfCmd = wcslen(*CommandLine);
if (L' ' <= key || key == L'\n')
{
if (key == L'\n')
{
*cursorLocation = sizeOfCmd;
}
setStringCapacities("im");
/*
* If the size of the string size is a multiple of 1024,
* it means the string has reached its max.
*/
if (sizeOfCmd && !((sizeOfCmd + 1) % 1024))
{
*CommandLine = realloc(*CommandLine, sizeof(wchar_t) * (sizeOfCmd + 1 + 1024));
}
indexToMoveChar = sizeOfCmd;
/* move each character to the next place */
while (indexToMoveChar > *cursorLocation)
{
(*CommandLine)[indexToMoveChar] = (*CommandLine)[indexToMoveChar - 1];
indexToMoveChar--;
}
/* Add the new character to the command line. */
(*CommandLine)[*cursorLocation] = (wchar_t) key;
if (isatty(fileno(stdin)))
{
/* We are not in a pipe */
printf("%lc", (*CommandLine)[*cursorLocation]);
}
sizeOfCmd++;
(*CommandLine)[sizeOfCmd] = L'\0';
(*cursorLocation)++;
setStringCapacities("ei");
/* To prevent a lost cursor (if cursor reach the last column of the term) */
if ((*CommandLine)[*cursorLocation] && (*CommandLine)[*cursorLocation] != L'\n')
{
/* Write the next character in the string then move the cursor left */
printf("%lc\b", (*CommandLine)[*cursorLocation]);
}
else
{
/* If there is none, write a space then move the cursor left */
printf(" \b");
}
}
return 0;
}
/* Move cursor to the right */
int gotoRight(wchar_t * CommandLine, unsigned int *cursorLocation)
{
int nbrCol;
int sizeOfWChar = 0;
int widthOfStringInTerm = 0;
nbrCol = tgetnum("co");
/* if the cursor is not at the end of the command line */
if (*cursorLocation != wcslen(CommandLine))
{
/* In case the wide char occupy more than one column */
if (CommandLine[*cursorLocation] == L'\n')
{
sizeOfWChar = 1;
}
else
{
sizeOfWChar = wcwidth(CommandLine[*cursorLocation]);
}
widthOfStringInTerm = sizeOfOneLineInTerm(CommandLine, *cursorLocation + 1);
/* While we are not at the beginning of the character... */
while (sizeOfWChar)
{
if ((widthOfStringInTerm && !(widthOfStringInTerm % nbrCol) && sizeOfWChar <= 1) // if last column of the terminal is reached...
|| CommandLine[*cursorLocation] == L'\n') // ... or if the cursor will go to the next line.
{
/* move the cursor down. */
setStringCapacities("do");
}
else
{
/* else, move it to the right */
setStringCapacities("nd");
}
sizeOfWChar--;
}
(*cursorLocation)++;
}
/* else, if the cursor is next to the last column of the window, move it down a line */
else if (widthOfStringInTerm && !(widthOfStringInTerm % nbrCol))
{
setStringCapacities("do");
}
return *cursorLocation;
}
/* Delete all characters from cursor to the end. */
int deleteFromCursToEndLine(wchar_t * CommandLine, unsigned int *cursorLocation)
{
/* set the end of the command line at the current cursor location */
CommandLine[*cursorLocation] = '\0';
/*
* Clear screen from cursor to the end of the screen
* Don't use "ce" because of multiline.
*/
setStringCapacities("cd");
return 0;
}
/* Delete a character in the command line */
int rmChar(wchar_t * CommandLine, int key, unsigned int *cursorLocation)
{
unsigned int indexToMoveChar;
unsigned int sizeOfCmd = 0;
sizeOfCmd = wcslen(CommandLine);
/*
* Case Backspace is pressed -> cursor must not be at the beginning of the command line
* Case Delete is pressed -> cursor must not be at the end of line
*/
if ((*cursorLocation && key == SCI_BACKSPACE) || ((sizeOfCmd != *cursorLocation) && key == SCI_DELETE))
{
if (key == SCI_BACKSPACE)
{
gotoLeft(CommandLine, cursorLocation);
}
indexToMoveChar = *cursorLocation;
/* Save cursor position where it must be placed */
setStringCapacities("sc");
while (indexToMoveChar < sizeOfCmd)
{
/* move each character to the previous place and print it */
CommandLine[indexToMoveChar] = CommandLine[indexToMoveChar + 1];
indexToMoveChar++;
}
CommandLine[indexToMoveChar] = L'\0';
/* Delete sreen from cursor to the end */
setStringCapacities("cd");
/* write the new string */
printf("%ls", &CommandLine[*cursorLocation]);
/* Put cursor to the previously saved position */
setStringCapacities("rc");
}
return 0;
}
/* Move cursor to the left */
int gotoLeft(wchar_t * CommandLine, unsigned int *cursorLocation)
{
int nbrCol;
int sizeOfWChar = 0;
int widthOfStringInTerm = 0;
int i = 0;
if (CommandLine != NULL)
{
i = *cursorLocation;
}
if (i)
{
/* In case the wide char occupy more than one column */
if (CommandLine[*cursorLocation - 1] == L'\n')
{
/* Because L'\n' return -1 */
sizeOfWChar = 1;
}
else
{
sizeOfWChar = wcwidth(CommandLine[*cursorLocation - 1]);
}
/* Get the number of move too reach the end of the line (not the end of the command) */
if (CommandLine[*cursorLocation - 1] == L'\n')
{
/* Manage two consecutive L'\n' */
if ((*cursorLocation >= 2 && CommandLine[*cursorLocation - 2] == L'\n'))
{
setStringCapacities("up");
i--;
if (CommandLine != NULL)
{
*cursorLocation = i;
}
return i;
}
/* If the cursor will move to a previous line separated by L'\n' */
if (*cursorLocation > 1)
{
nbrCol = (sizeOfOneLineInTerm(CommandLine, *cursorLocation - 2) + 1) % tgetnum("co");
}
else
{
nbrCol = printPrompt(NOWRITE_PROMPT);
}
}
else
{
/* If the cursor move up because of the terminal size */
nbrCol = tgetnum("co");
}
widthOfStringInTerm = sizeOfOneLineInTerm(CommandLine, i);
while (sizeOfWChar) /* While we are not at the beginning of the character... */
{
if ((nbrCol && !(widthOfStringInTerm % nbrCol) && sizeOfWChar <= 1) // if last column of the terminal is reached...
|| CommandLine[*cursorLocation - 1] == L'\n') // ... or if the cursor will go to the previous line.
{
setStringCapacities("up");
while (nbrCol)
{
setStringCapacities("nd");
--nbrCol;
}
}
else
{
putchar('\b');
}
sizeOfWChar--;
}
i--;
}
if (CommandLine != NULL)
{
*cursorLocation = i;
}
return i;
}