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-rw-r--r--vis-modes.c281
1 files changed, 281 insertions, 0 deletions
diff --git a/vis-modes.c b/vis-modes.c
new file mode 100644
index 0000000..08acec7
--- /dev/null
+++ b/vis-modes.c
@@ -0,0 +1,281 @@
+#include "vis-core.h"
+#include "util.h"
+
+Mode *mode_get(Vis *vis, enum VisMode mode) {
+ if (mode < LENGTH(vis_modes))
+ return &vis_modes[mode];
+ return NULL;
+}
+
+void mode_set(Vis *vis, Mode *new_mode) {
+ if (vis->mode == new_mode)
+ return;
+ if (vis->mode->leave)
+ vis->mode->leave(vis, new_mode);
+ if (vis->mode->isuser)
+ vis->mode_prev = vis->mode;
+ vis->mode = new_mode;
+ if (new_mode->enter)
+ new_mode->enter(vis, vis->mode_prev);
+ vis->win->ui->draw_status(vis->win->ui);
+}
+
+static bool mode_map(Mode *mode, const char *name, KeyBinding *binding) {
+ return map_put(mode->bindings, name, binding);
+}
+
+bool vis_mode_map(Vis *vis, enum VisMode modeid, const char *name, KeyBinding *binding) {
+ Mode *mode = mode_get(vis, modeid);
+ return mode && map_put(mode->bindings, name, binding);
+}
+
+bool vis_mode_bindings(Vis *vis, enum VisMode modeid, KeyBinding **bindings) {
+ Mode *mode = mode_get(vis, modeid);
+ if (!mode)
+ return false;
+ bool success = true;
+ for (KeyBinding *kb = *bindings; kb->key; kb++) {
+ if (!mode_map(mode, kb->key, kb))
+ success = false;
+ }
+ return success;
+}
+
+bool vis_mode_unmap(Vis *vis, enum VisMode modeid, const char *name) {
+ Mode *mode = mode_get(vis, modeid);
+ return mode && map_delete(mode->bindings, name);
+}
+
+/** mode switching event handlers */
+
+static void vis_mode_operator_enter(Vis *vis, Mode *old) {
+ vis_modes[VIS_MODE_OPERATOR].parent = &vis_modes[VIS_MODE_OPERATOR_OPTION];
+}
+
+static void vis_mode_operator_leave(Vis *vis, Mode *new) {
+ vis_modes[VIS_MODE_OPERATOR].parent = &vis_modes[VIS_MODE_MOVE];
+}
+
+static void vis_mode_operator_input(Vis *vis, const char *str, size_t len) {
+ /* invalid operator */
+ action_reset(vis, &vis->action);
+ mode_set(vis, vis->mode_prev);
+}
+
+static void vis_mode_visual_enter(Vis *vis, Mode *old) {
+ if (!old->visual) {
+ for (Cursor *c = view_cursors(vis->win->view); c; c = view_cursors_next(c))
+ view_cursors_selection_start(c);
+ vis_modes[VIS_MODE_OPERATOR].parent = &vis_modes[VIS_MODE_TEXTOBJ];
+ }
+}
+
+static void vis_mode_visual_line_enter(Vis *vis, Mode *old) {
+ if (!old->visual) {
+ for (Cursor *c = view_cursors(vis->win->view); c; c = view_cursors_next(c))
+ view_cursors_selection_start(c);
+ vis_modes[VIS_MODE_OPERATOR].parent = &vis_modes[VIS_MODE_TEXTOBJ];
+ }
+ vis_motion(vis, MOVE_LINE_END);
+}
+
+static void vis_mode_visual_line_leave(Vis *vis, Mode *new) {
+ if (!new->visual) {
+ view_selections_clear(vis->win->view);
+ vis_modes[VIS_MODE_OPERATOR].parent = &vis_modes[VIS_MODE_MOVE];
+ } else {
+ view_cursor_to(vis->win->view, view_cursor_get(vis->win->view));
+ }
+}
+
+static void vis_mode_visual_leave(Vis *vis, Mode *new) {
+ if (!new->visual) {
+ view_selections_clear(vis->win->view);
+ vis_modes[VIS_MODE_OPERATOR].parent = &vis_modes[VIS_MODE_MOVE];
+ }
+}
+
+static void vis_mode_prompt_input(Vis *vis, const char *str, size_t len) {
+ vis_insert_key(vis, str, len);
+}
+
+static void vis_mode_prompt_enter(Vis *vis, Mode *old) {
+ if (old->isuser && old != &vis_modes[VIS_MODE_PROMPT])
+ vis->mode_before_prompt = old;
+}
+
+static void vis_mode_prompt_leave(Vis *vis, Mode *new) {
+ if (new->isuser)
+ vis_prompt_hide(vis);
+}
+
+static void vis_mode_insert_enter(Vis *vis, Mode *old) {
+ if (!vis->macro_operator) {
+ macro_operator_record(vis);
+ action_reset(vis, &vis->action_prev);
+ vis->action_prev.macro = vis->macro_operator;
+ vis->action_prev.op = &ops[OP_INSERT];
+ }
+}
+
+static void vis_mode_insert_leave(Vis *vis, Mode *new) {
+ /* make sure we can recover the current state after an editing operation */
+ text_snapshot(vis->win->file->text);
+ if (new == mode_get(vis, VIS_MODE_NORMAL))
+ macro_operator_stop(vis);
+}
+
+static void vis_mode_insert_idle(Vis *vis) {
+ text_snapshot(vis->win->file->text);
+}
+
+static void vis_mode_insert_input(Vis *vis, const char *str, size_t len) {
+ vis_insert_key(vis, str, len);
+}
+
+static void vis_mode_replace_enter(Vis *vis, Mode *old) {
+ if (!vis->macro_operator) {
+ macro_operator_record(vis);
+ action_reset(vis, &vis->action_prev);
+ vis->action_prev.macro = vis->macro_operator;
+ vis->action_prev.op = &ops[OP_REPLACE];
+ }
+}
+
+static void vis_mode_replace_leave(Vis *vis, Mode *new) {
+ /* make sure we can recover the current state after an editing operation */
+ text_snapshot(vis->win->file->text);
+ if (new == mode_get(vis, VIS_MODE_NORMAL))
+ macro_operator_stop(vis);
+}
+
+static void vis_mode_replace_input(Vis *vis, const char *str, size_t len) {
+ vis_replace_key(vis, str, len);
+}
+
+
+
+/*
+ * the tree of modes currently looks like this. the double line between OPERATOR-OPTION
+ * and OPERATOR is only in effect once an operator is detected. that is when entering the
+ * OPERATOR mode its parent is set to OPERATOR-OPTION which makes {INNER-,}TEXTOBJ
+ * reachable. once the operator is processed (i.e. the OPERATOR mode is left) its parent
+ * mode is reset back to MOVE.
+ *
+ * Similarly the +-ed line between OPERATOR and TEXTOBJ is only active within the visual
+ * modes.
+ *
+ *
+ * BASIC
+ * (arrow keys etc.)
+ * / |
+ * /-------------------/ |
+ * READLINE MOVE
+ * / \ (h,j,k,l ...)
+ * / \ | \-----------------\
+ * / \ | |
+ * INSERT PROMPT OPERATOR ++++ INNER-TEXTOBJ
+ * | (history etc) (d,c,y,p ..) + (i [wsp[]()b<>{}B"'`] )
+ * | | \\ + |
+ * | | \\ + |
+ * REPLACE NORMAL \\ + TEXTOBJ
+ * | \\ + (a [wsp[]()b<>{}B"'`] )
+ * | \\ + + |
+ * | \\ + + |
+ * VISUAL \\ OPERATOR-OPTION
+ * | \\ (v,V)
+ * | \\ //
+ * | \\======//
+ * VISUAL-LINE
+ */
+
+Mode vis_modes[] = {
+ [VIS_MODE_BASIC] = {
+ .name = "BASIC",
+ .parent = NULL,
+ },
+ [VIS_MODE_MOVE] = {
+ .name = "MOVE",
+ .parent = &vis_modes[VIS_MODE_BASIC],
+ },
+ [VIS_MODE_TEXTOBJ] = {
+ .name = "TEXT-OBJECTS",
+ .parent = &vis_modes[VIS_MODE_MOVE],
+ },
+ [VIS_MODE_OPERATOR_OPTION] = {
+ .name = "OPERATOR-OPTION",
+ .parent = &vis_modes[VIS_MODE_TEXTOBJ],
+ },
+ [VIS_MODE_OPERATOR] = {
+ .name = "OPERATOR",
+ .parent = &vis_modes[VIS_MODE_MOVE],
+ .enter = vis_mode_operator_enter,
+ .leave = vis_mode_operator_leave,
+ .input = vis_mode_operator_input,
+ },
+ [VIS_MODE_NORMAL] = {
+ .name = "NORMAL",
+ .status = "",
+ .help = "",
+ .isuser = true,
+ .parent = &vis_modes[VIS_MODE_OPERATOR],
+ },
+ [VIS_MODE_VISUAL] = {
+ .name = "VISUAL",
+ .status = "--VISUAL--",
+ .help = "",
+ .isuser = true,
+ .parent = &vis_modes[VIS_MODE_OPERATOR],
+ .enter = vis_mode_visual_enter,
+ .leave = vis_mode_visual_leave,
+ .visual = true,
+ },
+ [VIS_MODE_VISUAL_LINE] = {
+ .name = "VISUAL LINE",
+ .status = "--VISUAL LINE--",
+ .help = "",
+ .isuser = true,
+ .parent = &vis_modes[VIS_MODE_VISUAL],
+ .enter = vis_mode_visual_line_enter,
+ .leave = vis_mode_visual_line_leave,
+ .visual = true,
+ },
+ [VIS_MODE_READLINE] = {
+ .name = "READLINE",
+ .parent = &vis_modes[VIS_MODE_BASIC],
+ },
+ [VIS_MODE_PROMPT] = {
+ .name = "PROMPT",
+ .help = "",
+ .isuser = true,
+ .parent = &vis_modes[VIS_MODE_READLINE],
+ .input = vis_mode_prompt_input,
+ .enter = vis_mode_prompt_enter,
+ .leave = vis_mode_prompt_leave,
+ },
+ [VIS_MODE_INSERT] = {
+ .name = "INSERT",
+ .status = "--INSERT--",
+ .help = "",
+ .isuser = true,
+ .parent = &vis_modes[VIS_MODE_READLINE],
+ .enter = vis_mode_insert_enter,
+ .leave = vis_mode_insert_leave,
+ .input = vis_mode_insert_input,
+ .idle = vis_mode_insert_idle,
+ .idle_timeout = 3,
+ },
+ [VIS_MODE_REPLACE] = {
+ .name = "REPLACE",
+ .status = "--REPLACE--",
+ .help = "",
+ .isuser = true,
+ .parent = &vis_modes[VIS_MODE_INSERT],
+ .enter = vis_mode_replace_enter,
+ .leave = vis_mode_replace_leave,
+ .input = vis_mode_replace_input,
+ .idle = vis_mode_insert_idle,
+ .idle_timeout = 3,
+ },
+};
+
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