tMake line entry slightly more usable (but only slightly) - ltk - Socket-based GUI for X11 (WIP)
HTML git clone git://lumidify.org/ltk.git (fast, but not encrypted)
HTML git clone https://lumidify.org/git/ltk.git (encrypted, but very slow)
DIR Log
DIR Files
DIR Refs
DIR README
DIR LICENSE
---
DIR commit 004ac7555f2e18a6f439e80a8aca23e52f838621
DIR parent 7598671835a7421e8415a978cc055a61b5d8588a
HTML Author: lumidify <nobody@lumidify.org>
Date: Thu, 17 Aug 2023 22:47:04 +0200
Make line entry slightly more usable (but only slightly)
Diffstat:
M .ltk/ltk.cfg | 12 +++++-------
M src/entry.c | 271 ++++++++++++++++++++++++-------
M src/entry.h | 3 +++
M src/text_pango.c | 21 ---------------------
M src/util.c | 21 +++++++++++++++++++++
M src/util.h | 3 +++
6 files changed, 244 insertions(+), 87 deletions(-)
---
DIR diff --git a/.ltk/ltk.cfg b/.ltk/ltk.cfg
t@@ -36,13 +36,11 @@ bind-keypress cursor-to-beginning sym home
bind-keypress cursor-to-end sym end
bind-keypress cursor-left sym left
bind-keypress cursor-right sym right
-#bind-keypress delete-backwards sym backspace
-#bind-keypress delete-forwards sym delete
-#bind-keypress cursor-left sym left
-#bind-keypress cursor-right sym right
-#bind-keypress selection-left sym left mods shift
-#bind-keypress selection-right sym right mods shift
-#bind-keypress select-all text a mods ctrl
+bind-keypress select-all text a mods ctrl
+bind-keypress delete-char-backwards sym backspace
+bind-keypress delete-char-forwards sym delete
+bind-keypress expand-selection-left sym left mods shift
+bind-keypress expand-selection-right sym right mods shift
# default mapping (just to silence warnings)
[key-mapping]
DIR diff --git a/src/entry.c b/src/entry.c
t@@ -14,6 +14,9 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
+/* FIXME: support RTL text! */
+/* FIXME: mouse actions, copy-paste, allow opening text in external program */
+
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
t@@ -53,16 +56,22 @@ static int ltk_entry_motion_notify(ltk_widget *self, ltk_motion_event *event);
static int ltk_entry_mouse_enter(ltk_widget *self, ltk_motion_event *event);
static int ltk_entry_mouse_leave(ltk_widget *self, ltk_motion_event *event);
-/* FIXME: give entire key event, not just text */
/* FIXME: also allow binding key release, not just press */
-typedef void (*cb_func)(ltk_entry *, char *, size_t);
+typedef void (*cb_func)(ltk_entry *, ltk_key_event *);
/* FIXME: configure mouse actions, e.g. select-word-under-pointer, move-cursor-to-pointer */
-static void cursor_to_beginning(ltk_entry *entry, char *text, size_t len);
-static void cursor_to_end(ltk_entry *entry, char *text, size_t len);
-static void cursor_left(ltk_entry *entry, char *text, size_t len);
-static void cursor_right(ltk_entry *entry, char *text, size_t len);
+static void cursor_to_beginning(ltk_entry *entry, ltk_key_event *event);
+static void cursor_to_end(ltk_entry *entry, ltk_key_event *event);
+static void cursor_left(ltk_entry *entry, ltk_key_event *event);
+static void cursor_right(ltk_entry *entry, ltk_key_event *event);
+static void expand_selection_left(ltk_entry *entry, ltk_key_event *event);
+static void expand_selection_right(ltk_entry *entry, ltk_key_event *event);
+static void select_all(ltk_entry *entry, ltk_key_event *event);
+static void delete_char_backwards(ltk_entry *entry, ltk_key_event *event);
+static void delete_char_forwards(ltk_entry *entry, ltk_key_event *event);
+static void recalc_ideal_size(ltk_entry *entry);
+static void ensure_cursor_shown(ltk_entry *entry);
struct key_cb {
char *text;
t@@ -74,6 +83,11 @@ static struct key_cb cb_map[] = {
{"cursor-right", &cursor_right},
{"cursor-to-beginning", &cursor_to_beginning},
{"cursor-to-end", &cursor_to_end},
+ {"delete-char-backwards", &delete_char_backwards},
+ {"delete-char-forwards", &delete_char_forwards},
+ {"expand-selection-left", &expand_selection_left},
+ {"expand-selection-right", &expand_selection_right},
+ {"select-all", &select_all},
};
struct keypress_cfg {
t@@ -157,6 +171,7 @@ static struct ltk_widget_vtable vtable = {
static struct {
int border_width;
ltk_color text_color;
+ ltk_color selection_color;
int pad;
ltk_color border;
t@@ -193,6 +208,7 @@ static ltk_theme_parseinfo parseinfo[] = {
{"fill-pressed", THEME_COLOR, {.color = &theme.fill_pressed}, {.color = "#113355"}, 0, 0, 0},
{"pad", THEME_INT, {.i = &theme.pad}, {.i = 5}, 0, MAX_ENTRY_PADDING, 0},
{"text-color", THEME_COLOR, {.color = &theme.text_color}, {.color = "#FFFFFF"}, 0, 0, 0},
+ {"selection-color", THEME_COLOR, {.color = &theme.selection_color}, {.color = "#000000"}, 0, 0, 0},
};
static int parseinfo_sorted = 0;
t@@ -262,7 +278,7 @@ ltk_entry_redraw_surface(ltk_entry *entry, ltk_surface *s) {
int text_y = (rect.h - text_h) / 2;
ltk_rect clip_rect = (ltk_rect){text_x, text_y, rect.w - 2 * bw - 2 * theme.pad, text_h};
ltk_text_line_draw_clipped(entry->tl, s, &theme.text_color, text_x - entry->cur_offset, text_y, clip_rect);
- if (entry->widget.state & LTK_FOCUSED) {
+ if ((entry->widget.state & LTK_FOCUSED) && entry->sel_start == entry->sel_end) {
int x, y, w, h;
ltk_text_line_pos_to_rect(entry->tl, entry->pos, &x, &y, &w, &h);
/* FIXME: configure line width */
t@@ -271,34 +287,197 @@ ltk_entry_redraw_surface(ltk_entry *entry, ltk_surface *s) {
entry->widget.dirty = 0;
}
-/* FIXME: these don't need len, but they do need rawtext as well */
static void
-cursor_to_beginning(ltk_entry *entry, char *text, size_t len) {
- (void)text;
- (void)len;
+set_selection(ltk_entry *entry, size_t start, size_t end) {
+ entry->sel_start = start;
+ entry->sel_end = end;
+ ltk_text_line_clear_attrs(entry->tl);
+ if (start != end)
+ ltk_text_line_add_attr_bg(entry->tl, entry->sel_start, entry->sel_end, &theme.selection_color);
+ entry->widget.dirty = 1;
+ ltk_window_invalidate_widget_rect(entry->widget.window, &entry->widget);
+}
+
+static void
+wipe_selection(ltk_entry *entry) {
+ set_selection(entry, 0, 0);
+}
+
+static void
+cursor_to_beginning(ltk_entry *entry, ltk_key_event *event) {
+ (void)event;
+ wipe_selection(entry);
entry->pos = 0;
+ ensure_cursor_shown(entry);
}
static void
-cursor_to_end(ltk_entry *entry, char *text, size_t len) {
- (void)text;
- (void)len;
+cursor_to_end(ltk_entry *entry, ltk_key_event *event) {
+ (void)event;
+ wipe_selection(entry);
entry->pos = entry->len;
+ ensure_cursor_shown(entry);
+}
+
+static void
+cursor_left(ltk_entry *entry, ltk_key_event *event) {
+ (void)event;
+ if (entry->sel_start != entry->sel_end)
+ entry->pos = entry->sel_start;
+ else
+ entry->pos = ltk_text_line_move_cursor_visually(entry->tl, entry->pos, -1, NULL);
+ wipe_selection(entry);
+ ensure_cursor_shown(entry);
+}
+
+static void
+cursor_right(ltk_entry *entry, ltk_key_event *event) {
+ (void)event;
+ if (entry->sel_start != entry->sel_end)
+ entry->pos = entry->sel_end;
+ else
+ entry->pos = ltk_text_line_move_cursor_visually(entry->tl, entry->pos, 1, NULL);
+ wipe_selection(entry);
+ ensure_cursor_shown(entry);
+}
+
+static void
+expand_selection(ltk_entry *entry, int dir) {
+ size_t pos = entry->pos;
+ size_t otherpos = entry->pos;
+ if (entry->sel_start != entry->sel_end) {
+ pos = entry->sel_side == 0 ? entry->sel_start : entry->sel_end;
+ otherpos = entry->sel_side == 1 ? entry->sel_start : entry->sel_end;
+ }
+ size_t new = ltk_text_line_move_cursor_visually(entry->tl, pos, dir, NULL);
+ if (new < otherpos) {
+ set_selection(entry, new, otherpos);
+ entry->sel_side = 0;
+ } else if (otherpos < new) {
+ set_selection(entry, otherpos, new);
+ entry->sel_side = 1;
+ } else {
+ entry->pos = new;
+ wipe_selection(entry);
+ }
+}
+
+static void
+expand_selection_left(ltk_entry *entry, ltk_key_event *event) {
+ (void)event;
+ expand_selection(entry, -1);
+}
+
+static void
+expand_selection_right(ltk_entry *entry, ltk_key_event *event) {
+ (void)event;
+ expand_selection(entry, 1);
}
-/* FIXME: actually move shown text */
static void
-cursor_left(ltk_entry *entry, char *text, size_t len) {
- (void)text;
- (void)len;
- entry->pos = ltk_text_line_move_cursor_visually(entry->tl, entry->pos, -1, NULL);
+delete_text(ltk_entry *entry, size_t start, size_t end) {
+ memmove(entry->text + start, entry->text + end, entry->len - end);
+ entry->len -= end - start;
+ entry->text[entry->len] = '\0';
+ entry->pos = start;
+ wipe_selection(entry);
+ ltk_text_line_set_text(entry->tl, entry->text, 0);
+ recalc_ideal_size(entry);
+ ensure_cursor_shown(entry);
+ entry->widget.dirty = 1;
+ ltk_window_invalidate_widget_rect(entry->widget.window, &entry->widget);
}
static void
-cursor_right(ltk_entry *entry, char *text, size_t len) {
- (void)text;
- (void)len;
- entry->pos = ltk_text_line_move_cursor_visually(entry->tl, entry->pos, 1, NULL);
+delete_char_backwards(ltk_entry *entry, ltk_key_event *event) {
+ (void)event;
+ if (entry->sel_start != entry->sel_end) {
+ delete_text(entry, entry->sel_start, entry->sel_end);
+ } else {
+ size_t new = prev_utf8(entry->text, entry->pos);
+ delete_text(entry, new, entry->pos);
+ }
+}
+
+static void
+delete_char_forwards(ltk_entry *entry, ltk_key_event *event) {
+ (void)event;
+ if (entry->sel_start != entry->sel_end) {
+ delete_text(entry, entry->sel_start, entry->sel_end);
+ } else {
+ size_t new = next_utf8(entry->text, entry->len, entry->pos);
+ delete_text(entry, entry->pos, new);
+ }
+}
+
+static void
+select_all(ltk_entry *entry, ltk_key_event *event) {
+ (void)event;
+ set_selection(entry, 0, entry->len);
+ entry->sel_side = 0;
+}
+
+static void
+recalc_ideal_size(ltk_entry *entry) {
+ /* FIXME: need to react to resize and adjust cur_offset */
+ int w, h;
+ ltk_text_line_get_size(entry->tl, &w, &h);
+ unsigned int ideal_h = h + 2 * theme.border_width + 2 * theme.pad;
+ unsigned int ideal_w = w + 2 * theme.border_width + 2 * theme.pad;
+ if (ideal_w != entry->widget.ideal_w || ideal_h != entry->widget.ideal_h) {
+ entry->widget.ideal_w = ideal_w;
+ entry->widget.ideal_h = ideal_h;
+ if (entry->widget.parent && entry->widget.parent->vtable->child_size_change)
+ entry->widget.parent->vtable->child_size_change(entry->widget.parent, &entry->widget);
+ }
+}
+
+static void
+ensure_cursor_shown(ltk_entry *entry) {
+ int x, y, w, h;
+ ltk_text_line_pos_to_rect(entry->tl, entry->pos, &x, &y, &w, &h);
+ /* FIXME: test if anything weird can happen since resize is called by parent->child_size_change,
+ and then the stuff on the next few lines is done afterwards */
+ /* FIXME: adjustable cursor width */
+ int text_w = entry->widget.lrect.w - 2 * theme.border_width - 2 * theme.pad;
+ if (x + 1 > text_w + entry->cur_offset) {
+ entry->cur_offset = x - text_w + 1;
+ entry->widget.dirty = 1;
+ ltk_window_invalidate_widget_rect(entry->widget.window, &entry->widget);
+ } else if (x < entry->cur_offset) {
+ entry->cur_offset = x;
+ entry->widget.dirty = 1;
+ ltk_window_invalidate_widget_rect(entry->widget.window, &entry->widget);
+ }
+}
+
+/* FIXME: maybe make this a regular key binding with wildcard text like in ledit? */
+static void
+insert_text(ltk_entry *entry, char *text, size_t len) {
+ /* FIXME: ignore newlines, etc. */
+ size_t new_alloc = ideal_array_size(entry->alloc, entry->len + len + 1 - (entry->sel_end - entry->sel_start));
+ if (new_alloc != entry->alloc) {
+ entry->text = ltk_realloc(entry->text, new_alloc);
+ entry->alloc = new_alloc;
+ }
+ /* FIXME: also need to reset selecting status once mouse selections are supported */
+ if (entry->sel_start != entry->sel_end) {
+ entry->pos = entry->sel_start;
+ memmove(entry->text + entry->pos + len, entry->text + entry->sel_end, entry->len - entry->sel_end);
+ entry->len = entry->len + len - (entry->sel_end - entry->sel_start);
+ wipe_selection(entry);
+ } else {
+ memmove(entry->text + entry->pos + len, entry->text + entry->pos, entry->len - entry->pos);
+ entry->len += len;
+ }
+ memmove(entry->text + entry->pos, text, len);
+ entry->pos += len;
+ entry->text[entry->len] = '\0';
+ ltk_text_line_set_text(entry->tl, entry->text, 0);
+ recalc_ideal_size(entry);
+ ensure_cursor_shown(entry);
+ entry->widget.dirty = 1;
+ ltk_window_invalidate_widget_rect(entry->widget.window, &entry->widget);
}
static int
t@@ -307,51 +486,24 @@ ltk_entry_key_press(ltk_widget *self, ltk_key_event *event) {
ltk_keypress_binding b;
for (size_t i = 0; i < ltk_array_length(keypresses); i++) {
b = ltk_array_get(keypresses, i).b;
- /* FIXME: do this properly */
- if (b.sym == event->sym) {
- ltk_array_get(keypresses, i).cb.func(entry, event->text, 0);
+ /* FIXME: change naming (rawtext, text, mapped...) */
+ /* FIXME: a bit weird to mask out shift, but if that isn't done, it
+ would need to be included for all mappings with capital letters */
+ if ((b.mods == event->modmask && b.sym == event->sym) ||
+ (b.mods == (event->modmask & ~LTK_MOD_SHIFT) &&
+ ((b.text && event->mapped && !strcmp(b.text, event->mapped)) ||
+ (b.rawtext && event->text && !strcmp(b.rawtext, event->text))))) {
+ ltk_array_get(keypresses, i).cb.func(entry, event);
entry->widget.dirty = 1;
ltk_window_invalidate_widget_rect(self->window, self);
return 1;
}
}
- /* FIXME: rawtext? */
if (event->text) {
/* FIXME: properly handle everything */
if (event->text[0] == '\n' || event->text[0] == '\r' || event->text[0] == 0x1b)
return 0;
- size_t len = strlen(event->text);
- if (entry->alloc < entry->len + len + 1) {
- size_t new_alloc = ideal_array_size(entry->alloc, entry->len + len + 1);
- entry->text = ltk_realloc(entry->text, new_alloc);
- entry->alloc = new_alloc;
- }
- memmove(entry->text + entry->pos + len, entry->text + entry->pos, entry->len - entry->pos);
- memmove(entry->text + entry->pos, event->text, len);
- entry->len += len;
- entry->pos += len;
- entry->text[entry->len] = '\0';
- ltk_text_line_set_text(entry->tl, entry->text, 0);
- /* FIXME: need to react to resize and adjust cur_offset */
- int x, y, w, h;
- ltk_text_line_get_size(entry->tl, &w, &h);
- unsigned int ideal_h = h + 2 * theme.border_width + 2 * theme.pad;
- unsigned int ideal_w = w + 2 * theme.border_width + 2 * theme.pad;
- if (ideal_w != self->ideal_w || ideal_h != self->ideal_h) {
- self->ideal_w = ideal_w;
- self->ideal_h = ideal_h;
- if (self->parent && self->parent->vtable->child_size_change)
- self->parent->vtable->child_size_change(self->parent, self);
- }
- ltk_text_line_pos_to_rect(entry->tl, entry->pos, &x, &y, &w, &h);
- /* FIXME: test if anything weird can happen since resize is called by parent->child_size_change,
- and then the stuff on the next few lines is done afterwards */
- /* FIXME: adjustable cursor width */
- int text_w = entry->widget.lrect.w - 2 * theme.border_width - 2 * theme.pad;
- if (x - entry->cur_offset + 1 > text_w)
- entry->cur_offset = x - text_w + 1;
- entry->widget.dirty = 1;
- ltk_window_invalidate_widget_rect(self->window, self);
+ insert_text(entry, event->text, strlen(event->text));
return 1;
}
return 0;
t@@ -410,6 +562,7 @@ ltk_entry_create(ltk_window *window, const char *id, char *text) {
entry->len = strlen(text);
entry->alloc = entry->len + 1;
entry->pos = entry->sel_start = entry->sel_end = 0;
+ entry->sel_side = 0;
entry->widget.dirty = 1;
return entry;
DIR diff --git a/src/entry.h b/src/entry.h
t@@ -29,6 +29,9 @@ typedef struct {
char *text;
size_t len, alloc, pos, sel_start, sel_end;
int cur_offset;
+ /* 0 when side of selection that is expanded by cursor keys
+ is left, 1 when it is right */
+ int sel_side;
} ltk_entry;
int ltk_entry_ini_handler(ltk_window *window, const char *prop, const char *value);
DIR diff --git a/src/text_pango.c b/src/text_pango.c
t@@ -52,27 +52,6 @@ struct ltk_text_context {
char *default_font;
};
-size_t
-prev_utf8(char *text, size_t index) {
- if (index == 0)
- return 0;
- size_t i = index - 1;
- /* find valid utf8 char - this probably needs to be improved */
- while (i > 0 && ((text[i] & 0xC0) == 0x80))
- i--;
- return i;
-}
-
-size_t
-next_utf8(char *text, size_t len, size_t index) {
- if (index >= len)
- return len;
- size_t i = index + 1;
- while (i < len && ((text[i] & 0xC0) == 0x80))
- i++;
- return i;
-}
-
ltk_text_context *
ltk_text_context_create(ltk_renderdata *data, char *default_font) {
ltk_text_context *ctx = ltk_malloc(sizeof(ltk_text_context));
DIR diff --git a/src/util.c b/src/util.c
t@@ -162,3 +162,24 @@ str_array_equal(const char *terminated, const char *array, size_t len) {
}
return 0;
}
+
+size_t
+prev_utf8(char *text, size_t index) {
+ if (index == 0)
+ return 0;
+ size_t i = index - 1;
+ /* find valid utf8 char - this probably needs to be improved */
+ while (i > 0 && ((text[i] & 0xC0) == 0x80))
+ i--;
+ return i;
+}
+
+size_t
+next_utf8(char *text, size_t len, size_t index) {
+ if (index >= len)
+ return len;
+ size_t i = index + 1;
+ while (i < len && ((text[i] & 0xC0) == 0x80))
+ i++;
+ return i;
+}
DIR diff --git a/src/util.h b/src/util.h
t@@ -48,6 +48,9 @@ void ltk_warn(const char *format, ...);
/* Note: this doesn't work if array contains '\0'. */
int str_array_equal(const char *terminated, const char *array, size_t len);
+size_t prev_utf8(char *text, size_t index);
+size_t next_utf8(char *text, size_t len, size_t index);
+
#define LENGTH(X) (sizeof(X) / sizeof(X[0]))
#endif /* _LTK_UTIL_H_ */