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editor: Add support for setting a preedit

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Add support for setting a preedit text to the editor example.

Signed-off-by: Jan Arne Petersen <jpetersen@openismus.com>
This commit is contained in:
Jan Arne Petersen 2012-09-09 23:08:39 +02:00 committed by Kristian Høgsberg
parent 0e5bd45100
commit c1fbcb7c38
1 changed files with 89 additions and 2 deletions
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91
clients/editor.c
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@ -51,6 +51,8 @@ struct text_entry {
int active;
uint32_t cursor;
uint32_t anchor;
char *preedit_text;
uint32_t preedit_cursor;
struct text_model *model;
struct text_layout *layout;
};
@ -311,6 +313,8 @@ text_entry_create(struct editor *editor, const char *text)
entry->active = 0;
entry->cursor = strlen(text);
entry->anchor = entry->cursor;
entry->preedit_text = NULL;
entry->preedit_cursor = 0;
entry->model = text_model_factory_create_text_model(editor->text_model_factory);
text_model_add_listener(entry->model, &text_model_listener, entry);
@ -407,6 +411,30 @@ text_entry_deactivate(struct text_entry *entry,
seat);
}
static void
text_entry_update_layout(struct text_entry *entry)
{
char *text;
assert(((unsigned int)entry->cursor) <= strlen(entry->text));
if (!entry->preedit_text) {
text_layout_set_text(entry->layout, entry->text);
return;
}
text = malloc(strlen(entry->text) + strlen(entry->preedit_text) + 1);
strncpy(text, entry->text, entry->cursor);
strcpy(text + entry->cursor, entry->preedit_text);
strcpy(text + entry->cursor + strlen(entry->preedit_text),
entry->text + entry->cursor);
text_layout_set_text(entry->layout, text);
free(text);
widget_schedule_redraw(entry->widget);
}
static void
text_entry_insert_at_cursor(struct text_entry *entry, const char *text)
{
@ -422,7 +450,27 @@ text_entry_insert_at_cursor(struct text_entry *entry, const char *text)
entry->cursor += strlen(text);
entry->anchor += strlen(text);
text_layout_set_text(entry->layout, entry->text);
text_entry_update_layout(entry);
}
static void
text_entry_set_preedit(struct text_entry *entry,
const char *preedit_text,
int preedit_cursor)
{
if (entry->preedit_text) {
free(entry->preedit_text);
entry->preedit_text = NULL;
entry->preedit_cursor = 0;
}
if (!preedit_text)
return;
entry->preedit_text = strdup(preedit_text);
entry->preedit_cursor = preedit_cursor;
text_entry_update_layout(entry);
}
static void
@ -431,6 +479,12 @@ text_entry_set_cursor_position(struct text_entry *entry,
{
entry->cursor = text_layout_xy_to_index(entry->layout, x, y);
if (entry->cursor >= entry->preedit_cursor) {
entry->cursor -= entry->preedit_cursor;
}
text_entry_update_layout(entry);
widget_schedule_redraw(entry->widget);
}
@ -485,7 +539,9 @@ text_entry_draw_cursor(struct text_entry *entry, cairo_t *cr)
cairo_rectangle_t cursor_pos;
text_layout_extents(entry->layout, &extents);
text_layout_get_cursor_pos(entry->layout, entry->cursor, &cursor_pos);
text_layout_get_cursor_pos(entry->layout,
entry->cursor + entry->preedit_cursor,
&cursor_pos);
cairo_set_line_width(cr, 1.0);
cairo_move_to(cr, cursor_pos.x, extents.y_bearing + extents.height + 2);
@ -493,6 +549,34 @@ text_entry_draw_cursor(struct text_entry *entry, cairo_t *cr)
cairo_stroke(cr);
}
static void
text_entry_draw_preedit(struct text_entry *entry, cairo_t *cr)
{
cairo_text_extents_t extents;
cairo_rectangle_t start;
cairo_rectangle_t end;
if (!entry->preedit_text)
return;
text_layout_extents(entry->layout, &extents);
text_layout_index_to_pos(entry->layout, entry->cursor, &start);
text_layout_index_to_pos(entry->layout,
entry->cursor + strlen(entry->preedit_text),
&end);
cairo_save (cr);
cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
cairo_rectangle(cr,
start.x, 0,
end.x - start.x, 1);
cairo_fill(cr);
cairo_restore (cr);
}
static void
text_entry_redraw_handler(struct widget *widget, void *data)
{
@ -535,6 +619,8 @@ text_entry_redraw_handler(struct widget *widget, void *data)
text_entry_draw_cursor(entry, cr);
text_entry_draw_preedit(entry, cr);
cairo_pop_group_to_source(cr);
cairo_paint(cr);
@ -646,6 +732,7 @@ main(int argc, char *argv[])
editor.entry = text_entry_create(&editor, "Entry");
editor.editor = text_entry_create(&editor, "Editor");
text_entry_set_preedit(editor.editor, "preedit", strlen("preedit"));
window_set_title(editor.window, "Text Editor");