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in do_mouseinput(), add mouse wheel support, per Helmut Jarausch's
suggestion git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4105 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
This commit is contained in:
David Lawrence Ramsey
parent
c88556cbb1
commit
b9fa1b1466
@ -1,3 +1,11 @@
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2007-05-15 David Lawrence Ramsey <pooka109@gmail.com>
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* winio.c (do_mouseinput): Add mouse wheel support, per Helmut
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Jarausch's suggestion. Now, if nano is built with mouse support
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and is using a version of ncurses compiled with the
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--enable-ext-mouse option, rolling the mouse wheel up or down
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will move the cursor three lines up or down.
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2007-04-23 David Lawrence Ramsey <pooka109@gmail.com>
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* TODO: Add entries for fixing limitations with pasting text and
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196
src/winio.c
196
src/winio.c
@ -1624,14 +1624,17 @@ int *parse_verbatim_kbinput(WINDOW *win, size_t *kbinput_len)
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}
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#ifndef DISABLE_MOUSE
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/* Check for a mouse event, and if one's taken place, save the
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* coordinates where it took place in mouse_x and mouse_y. After that,
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* assuming allow_shortcuts is FALSE, if the shortcut list on the
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* bottom two lines of the screen is visible and the mouse event took
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* place on it, figure out which shortcut was clicked and put back the
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* equivalent keystroke(s). Return FALSE if no keystrokes were
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* put back, or TRUE if at least one was. Assume that KEY_MOUSE has
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* already been read in. */
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/* Handle any mouse events that may have occurred. We currently handle
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* releases or clicks of the first mouse button. If allow_shortcuts is
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* TRUE, releasing or clicking on a visible shortcut will put back the
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* keystroke associated with that shortcut. If NCURSES_MOUSE_VERSION is
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* at least 2, we also currently handle presses of the fourth mouse
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* button (upward rolls of the mouse wheel) by putting back the
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* keystrokes to move up, and presses of the fifth mouse button
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* (downward rolls of the mouse wheel) by putting back the keystrokes to
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* move down. Return FALSE if we don't put back any keystrokes in the
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* course of handling mouse events, or TRUE if we do. Assume that
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* KEY_MOUSE has already been read in. */
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bool get_mouseinput(int *mouse_x, int *mouse_y, bool allow_shortcuts)
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{
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MEVENT mevent;
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@ -1643,88 +1646,117 @@ bool get_mouseinput(int *mouse_x, int *mouse_y, bool allow_shortcuts)
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if (getmouse(&mevent) == ERR)
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return FALSE;
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/* If it's not a release or click of the first mouse button, get
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* out. */
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if (!(mevent.bstate & (BUTTON1_RELEASED | BUTTON1_CLICKED)))
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return FALSE;
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/* Handle releases or clicks of the first mouse button. */
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if (mevent.bstate & (BUTTON1_RELEASED | BUTTON1_CLICKED)) {
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/* Save the screen coordinates where the mouse event took
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* place. */
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*mouse_x = mevent.x;
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*mouse_y = mevent.y;
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/* Save the screen coordinates where the mouse event took place. */
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*mouse_x = mevent.x;
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*mouse_y = mevent.y;
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/* If we're allowing shortcuts, the current shortcut list is
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* being displayed on the last two lines of the screen, and the
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* mouse event took place inside it, we need to figure out which
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* shortcut was clicked and put back the equivalent keystroke(s)
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* for it. */
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if (allow_shortcuts && !ISSET(NO_HELP) && wenclose(bottomwin,
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*mouse_y, *mouse_x)) {
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int i, j;
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size_t currslen;
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/* The number of shortcuts in the current shortcut
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* list. */
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const shortcut *s = currshortcut;
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/* The actual shortcut we clicked on, starting at the
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* first one in the current shortcut list. */
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/* If we're allowing shortcuts, the current shortcut list is being
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* displayed on the last two lines of the screen, and the mouse
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* event took place inside it, we need to figure out which shortcut
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* was clicked and put back the equivalent keystroke(s) for it. */
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if (allow_shortcuts && !ISSET(NO_HELP) && wenclose(bottomwin,
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*mouse_y, *mouse_x)) {
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int i, j;
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size_t currslen;
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/* The number of shortcuts in the current shortcut list. */
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const shortcut *s = currshortcut;
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/* The actual shortcut we clicked on, starting at the first
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* one in the current shortcut list. */
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/* Get the shortcut lists' length. */
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if (currshortcut == main_list)
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currslen = MAIN_VISIBLE;
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else {
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currslen = length_of_list(currshortcut);
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/* We don't show any more shortcuts than the main list
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* does. */
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if (currslen > MAIN_VISIBLE)
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/* Get the shortcut lists' length. */
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if (currshortcut == main_list)
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currslen = MAIN_VISIBLE;
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}
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else {
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currslen = length_of_list(currshortcut);
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/* Calculate the width of all of the shortcuts in the list
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* except for the last two, which are longer by (COLS % i)
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* columns so as to not waste space. */
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if (currslen < 2)
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i = COLS / (MAIN_VISIBLE / 2);
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else
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i = COLS / ((currslen / 2) + (currslen % 2));
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/* We don't show any more shortcuts than the main list
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* does. */
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if (currslen > MAIN_VISIBLE)
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currslen = MAIN_VISIBLE;
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}
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/* Calculate the y-coordinate relative to the beginning of
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* the shortcut list in bottomwin, i.e. with the sizes of
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* topwin, edit, and the first line of bottomwin subtracted
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* out, and set j to it. */
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j = *mouse_y - (2 - no_more_space()) - editwinrows - 1;
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/* Calculate the width of all of the shortcuts in the list
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* except for the last two, which are longer by (COLS % i)
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* columns so as to not waste space. */
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if (currslen < 2)
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i = COLS / (MAIN_VISIBLE / 2);
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else
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i = COLS / ((currslen / 2) + (currslen % 2));
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/* If we're on the statusbar, don't do anything. */
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if (j < 0)
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/* Calculate the y-coordinate relative to the beginning of
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* the shortcut list in bottomwin, i.e. with the sizes of
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* topwin, edit, and the first line of bottomwin subtracted
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* out, and set j to it. */
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j = *mouse_y - (2 - no_more_space()) - editwinrows - 1;
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/* If we're on the statusbar, don't do anything. */
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if (j < 0)
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return FALSE;
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/* Calculate the x-coordinate relative to the beginning of
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* the shortcut list in bottomwin, and add it to j. j
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* should now be the index in the shortcut list of the
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* shortcut we clicked. */
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j = (*mouse_x / i) * 2 + j;
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/* Adjust j if we clicked in the last two shortcuts. */
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if ((j >= currslen) && (*mouse_x % i < COLS % i))
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j -= 2;
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/* If we're beyond the last shortcut, don't do anything. */
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if (j >= currslen)
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return FALSE;
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/* Go through the shortcut list to determine which shortcut
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* was clicked. */
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for (; j > 0; j--)
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s = s->next;
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/* And put back the equivalent key. Assume that each
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* shortcut has, at the very least, an equivalent control
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* key, an equivalent primary meta key sequence, or both. */
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if (s->ctrlval != NANO_NO_KEY) {
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unget_kbinput(s->ctrlval, FALSE, FALSE);
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return TRUE;
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} else if (s->metaval != NANO_NO_KEY) {
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unget_kbinput(s->metaval, TRUE, FALSE);
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return TRUE;
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}
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} else
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return FALSE;
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/* Calculate the x-coordinate relative to the beginning of the
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* shortcut list in bottomwin, and add it to j. j should now be
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* the index in the shortcut list of the shortcut we clicked. */
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j = (*mouse_x / i) * 2 + j;
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/* Adjust j if we clicked in the last two shortcuts. */
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if ((j >= currslen) && (*mouse_x % i < COLS % i))
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j -= 2;
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/* If we're beyond the last shortcut, don't do anything. */
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if (j >= currslen)
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return FALSE;
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/* Go through the shortcut list to determine which shortcut was
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* clicked. */
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for (; j > 0; j--)
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s = s->next;
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/* And put back the equivalent key. Assume that each shortcut
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* has, at the very least, an equivalent control key, an
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* equivalent primary meta key sequence, or both. */
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if (s->ctrlval != NANO_NO_KEY) {
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unget_kbinput(s->ctrlval, FALSE, FALSE);
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return TRUE;
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} else if (s->metaval != NANO_NO_KEY) {
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unget_kbinput(s->metaval, TRUE, FALSE);
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return TRUE;
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}
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}
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return FALSE;
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#if NCURSES_MOUSE_VERSION >= 2
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/* Handle presses of the fourth mouse button (upward rolls of the
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* mouse wheel). */
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else if (mevent.bstate & BUTTON4_PRESSED) {
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int i = 0;
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/* One upward roll of the mouse wheel is equivalent to moving up
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* three lines. */
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for (; i < 3; i++)
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unget_kbinput(NANO_PREVLINE_KEY, FALSE, FALSE);
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return TRUE;
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/* Handle presses of the fifth mouse button (downward rolls of the
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* mouse wheel). */
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} else if (mevent.bstate & BUTTON5_PRESSED) {
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int i = 0;
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/* One downward roll of the mouse wheel is equivalent to moving
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* down three lines. */
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for (; i < 3; i++)
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unget_kbinput(NANO_NEXTLINE_KEY, FALSE, FALSE);
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return TRUE;
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}
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#endif
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else
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return FALSE;
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}
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#endif /* !DISABLE_MOUSE */
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