From 67be25fbe43274340de89049fec7098cdf998b47 Mon Sep 17 00:00:00 2001 From: Jari Vetoniemi Date: Thu, 10 Apr 2014 01:09:35 +0300 Subject: Basic working bemenu with curses backend --- lib/menu.c | 527 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 527 insertions(+) create mode 100644 lib/menu.c (limited to 'lib/menu.c') diff --git a/lib/menu.c b/lib/menu.c new file mode 100644 index 0000000..50311cf --- /dev/null +++ b/lib/menu.c @@ -0,0 +1,527 @@ +/** + * @file bemenu.c + */ + +#include "internal.h" +#include +#include +#include +#include + +static bmItem** (*filterFunc[BM_FILTER_MODE_LAST])(bmMenu *menu, unsigned int *count, unsigned int *selected) = { + _bmFilterDmenu, + _bmFilterDmenuCaseInsensitive +}; + +static void _bmMenuFilter(bmMenu *menu) +{ + assert(menu != NULL); + + if (menu->filteredItems) + free(menu->filteredItems); + + menu->filteredCount = 0; + menu->filteredItems = NULL; + + unsigned int count, selected; + bmItem **filtered = filterFunc[menu->filterMode](menu, &count, &selected); + + menu->filteredItems = filtered; + menu->filteredCount = count; + menu->index = selected; +} + +static int _bmMenuGrowItems(bmMenu *menu) +{ + void *tmp; + static const unsigned int step = 32; + unsigned int nsize = sizeof(bmItem*) * (menu->allocatedCount + step); + + if (!(tmp = realloc(menu->items, nsize))) { + if (!(tmp = malloc(nsize))) + return 0; + + memcpy(tmp, menu->items, sizeof(bmItem*) * menu->allocatedCount); + } + + menu->items = tmp; + menu->allocatedCount += step; + memset(&menu->items[menu->itemsCount], 0, sizeof(bmItem*) * (menu->allocatedCount - menu->itemsCount)); + return 1; +} + +/** + * Create new bmMenu instance. + * + * @param drawMode Render method to be used for this menu instance. + * @return bmMenu for new menu instance, NULL if creation failed. + */ +bmMenu* bmMenuNew(bmDrawMode drawMode) +{ + bmMenu *menu = calloc(1, sizeof(bmMenu)); + + menu->drawMode = drawMode; + + if (!menu) + return NULL; + + int status = 1; + + switch (menu->drawMode) { + case BM_DRAW_MODE_CURSES: + status = _bmDrawCursesInit(&menu->renderApi); + break; + + default:break; + } + + if (status == 0) { + bmMenuFree(menu); + return NULL; + } + + return menu; +} + +/** + * Release bmMenu instance. + * + * @param menu bmMenu instance to be freed from memory. + */ +void bmMenuFree(bmMenu *menu) +{ + assert(menu != NULL); + + if (menu->renderApi.free) + menu->renderApi.free(); + + if (menu->title) + free(menu->title); + + bmMenuFreeItems(menu); + free(menu); +} + +/** + * Release items inside bmMenu instance. + * + * @param menu bmMenu instance which items will be freed from memory. + */ +void bmMenuFreeItems(bmMenu *menu) +{ + assert(menu != NULL); + + unsigned int i; + for (i = 0; i < menu->itemsCount; ++i) + bmItemFree(menu->items[i]); + + free(menu->items); + menu->allocatedCount = menu->itemsCount = 0; + menu->items = NULL; +} + +/** + * Set active filter mode to bmMenu instance. + * + * @param menu bmMenu instance where to set filter mode. + * @param mode bmFilterMode constant. + */ +void bmMenuSetFilterMode(bmMenu *menu, bmFilterMode mode) +{ + assert(menu != NULL); + + bmFilterMode oldMode = mode; + menu->filterMode = (mode >= BM_FILTER_MODE_LAST ? BM_FILTER_MODE_DMENU : mode); + + if (oldMode != mode) + _bmMenuFilter(menu); +} + +/** + * Get active filter mode from bmMenu instance. + * + * @param menu bmMenu instance where to get filter mode. + * @return bmFilterMode constant. + */ +bmFilterMode bmMenuGetFilterMode(const bmMenu *menu) +{ + assert(menu != NULL); + return menu->filterMode; +} + +/** + * Set title to bmMenu instance. + * + * @param menu bmMenu instance where to set title. + * @param title C "string" to set as title, can be NULL for empty title. + */ +int bmMenuSetTitle(bmMenu *menu, const char *title) +{ + assert(menu != NULL); + + char *copy = NULL; + if (title && !(copy = _bmStrdup(title))) + return 0; + + if (menu->title) + free(menu->title); + + menu->title = copy; + return 1; +} + +/** + * Get title from bmMenu instance. + * + * @param menu bmMenu instance where to get title from. + * @return Pointer to null terminated C "string", can be NULL for empty title. + */ +const char* bmMenuGetTitle(const bmMenu *menu) +{ + assert(menu != NULL); + return menu->title; +} + +/** + * Add item to bmMenu instance at specific index. + * + * @param menu bmMenu instance where item will be added. + * @param item bmItem instance to add. + * @param index Index where item will be added. + * @return 1 on successful add, 0 on failure. + */ +int bmMenuAddItemAt(bmMenu *menu, bmItem *item, unsigned int index) +{ + assert(menu != NULL); + assert(item != NULL); + + if (menu->itemsCount >= menu->allocatedCount && !_bmMenuGrowItems(menu)) + return 0; + + if (index + 1 != menu->itemsCount) { + unsigned int i = index; + memmove(&menu->items[i + 1], &menu->items[i], sizeof(bmItem*) * (menu->itemsCount - i)); + } + + menu->items[index] = item; + menu->itemsCount++; + return 1; +} + +/** + * Add item to bmMenu instance. + * + * @param menu bmMenu instance where item will be added. + * @param item bmItem instance to add. + * @return 1 on successful add, 0 on failure. + */ +int bmMenuAddItem(bmMenu *menu, bmItem *item) +{ + return bmMenuAddItemAt(menu, item, menu->itemsCount); +} + +/** + * Remove item from bmMenu instance at specific index. + * + * @param menu bmMenu instance from where item will be removed. + * @param index Index of item to remove. + * @return 1 on successful add, 0 on failure. + */ +int bmMenuRemoveItemAt(bmMenu *menu, unsigned int index) +{ + assert(menu != NULL); + + unsigned int i = index; + if (i >= menu->itemsCount) + return 0; + + memmove(&menu->items[i], &menu->items[i], sizeof(bmItem*) * (menu->itemsCount - i)); + return 1; +} + +/** + * Remove item from bmMenu instance. + * + * @param menu bmMenu instance from where item will be removed. + * @param item bmItem instance to remove. + * @return 1 on successful add, 0 on failure. + */ +int bmMenuRemoveItem(bmMenu *menu, bmItem *item) +{ + assert(menu != NULL); + assert(item != NULL); + + unsigned int i; + for (i = 0; i < menu->itemsCount && menu->items[i] != item; ++i); + return bmMenuRemoveItemAt(menu, i); +} + +/** + * Get selected item from bmMenu instance. + * + * @param menu bmMenu instance from where to get selected item. + * @return Selected bmItem instance, NULL if none selected. + */ +bmItem* bmMenuGetSelectedItem(const bmMenu *menu) +{ + assert(menu != NULL); + + unsigned int count; + bmItem **items = bmMenuGetFilteredItems(menu, &count); + + if (!items || count < menu->index) + return NULL; + + return items[menu->index]; +} + +/** + * Get items from bmMenu instance. + * + * @param menu bmMenu instance from where to get items. + * @param nmemb Reference to unsigned int where total count of returned items will be stored. + * @return Pointer to array of bmItem pointers. + */ +bmItem** bmMenuGetItems(const bmMenu *menu, unsigned int *nmemb) +{ + assert(menu != NULL); + + if (nmemb) + *nmemb = menu->itemsCount; + + return menu->items; +} + +/** + * Get filtered (displayed) items from bmMenu instance. + * + * @warning The pointer returned by this function _will_ be invalid when menu internally filters its list again. + * Do not store this pointer. + * + * @param menu bmMenu instance from where to get filtered items. + * @param nmemb Reference to unsigned int where total count of returned items will be stored. + * @return Pointer to array of bmItem pointers. + */ +bmItem** bmMenuGetFilteredItems(const bmMenu *menu, unsigned int *nmemb) +{ + assert(menu != NULL); + + if (nmemb) + *nmemb = (menu->filteredItems ? menu->filteredCount : menu->itemsCount); + + return (menu->filteredItems ? menu->filteredItems : menu->items); +} + +/** + * Set items to bmMenu instance. + * Will replace all the old items on bmMenu instance. + * + * @param menu bmMenu instance where items will be set. + * @param items Array of bmItem pointers to set. + * @param nmemb Total count of items in array. + * @return 1 on successful set, 0 on failure. + */ +int bmMenuSetItems(bmMenu *menu, const bmItem **items, unsigned int nmemb) +{ + assert(menu != NULL); + + if (items == NULL || nmemb == 0) { + bmMenuFreeItems(menu); + return 1; + } + + bmItem **newItems; + if (!(newItems = calloc(sizeof(bmItem*), nmemb))) + return 0; + + memcpy(newItems, items, sizeof(bmItem*) * nmemb); + bmMenuFreeItems(menu); + + menu->items = newItems; + menu->allocatedCount = menu->itemsCount = nmemb; + return 1; +} + +/** + * Create new bmMenu instance. + * + * @param drawMode Render method to be used for this menu instance. + * @return bmMenu for new menu instance, NULL if creation failed. + */ +void bmMenuRender(const bmMenu *menu) +{ + assert(menu != NULL); + + if (menu->renderApi.render) + menu->renderApi.render(menu); +} + +/** + * Poll key and unicode from underlying UI toolkit. + * + * This function will block on CURSES draw mode. + * + * @param menu bmMenu instance from which to poll. + * @param unicode Reference to unsigned int. + * @return bmKey for polled key. + */ +bmKey bmMenuGetKey(bmMenu *menu, unsigned int *unicode) +{ + assert(menu != NULL); + assert(unicode != NULL); + + *unicode = 0; + bmKey key = BM_KEY_NONE; + + if (menu->renderApi.getKey) + key = menu->renderApi.getKey(unicode); + + return key; +} + +/** + * Advances menu logic with key and unicode as input. + * + * @param menu bmMenu instance to be advanced. + * @return bmRunResult for menu state. + */ +bmRunResult bmMenuRunWithKey(bmMenu *menu, bmKey key, unsigned int unicode) +{ + assert(menu != NULL); + char *oldFilter = _bmStrdup(menu->filter); + unsigned int itemsCount = (menu->filteredItems ? menu->filteredCount : menu->itemsCount); + + switch (key) { + case BM_KEY_LEFT: + { + unsigned int oldCursor = menu->cursor; + menu->cursor -= _bmUtf8RunePrev(menu->filter, menu->cursor); + menu->cursesCursor -= _bmUtf8RuneWidth(menu->filter + menu->cursor, oldCursor - menu->cursor); + } + break; + + case BM_KEY_RIGHT: + { + unsigned int oldCursor = menu->cursor; + menu->cursor += _bmUtf8RuneNext(menu->filter, menu->cursor); + menu->cursesCursor += _bmUtf8RuneWidth(menu->filter + oldCursor, menu->cursor - oldCursor); + } + break; + + case BM_KEY_HOME: + menu->cursesCursor = menu->cursor = 0; + break; + + case BM_KEY_END: + menu->cursor = strlen(menu->filter); + menu->cursesCursor = _bmUtf8StringScreenWidth(menu->filter); + break; + + case BM_KEY_UP: + if (menu->index > 0) + menu->index--; + break; + + case BM_KEY_DOWN: + if (menu->index < itemsCount - 1) + menu->index++; + break; + + case BM_KEY_PAGE_UP: + menu->index = 0; + break; + + case BM_KEY_PAGE_DOWN: + menu->index = itemsCount - 1; + break; + + case BM_KEY_BACKSPACE: + { + size_t width; + menu->cursor -= _bmUtf8RuneRemove(menu->filter, menu->cursor, &width); + menu->cursesCursor -= width; + } + break; + + case BM_KEY_DELETE: + _bmUtf8RuneRemove(menu->filter, menu->cursor + 1, NULL); + break; + + case BM_KEY_LINE_DELETE_LEFT: + { + while (menu->cursor > 0) { + size_t width; + menu->cursor -= _bmUtf8RuneRemove(menu->filter, menu->cursor, &width); + menu->cursesCursor -= width; + } + } + break; + + case BM_KEY_LINE_DELETE_RIGHT: + menu->filter[menu->cursor] = 0; + break; + + case BM_KEY_WORD_DELETE: + { + while (menu->cursor < strlen(menu->filter) && !isspace(menu->filter[menu->cursor])) { + unsigned int oldCursor = menu->cursor; + menu->cursor += _bmUtf8RuneNext(menu->filter, menu->cursor); + menu->cursesCursor += _bmUtf8RuneWidth(menu->filter + oldCursor, menu->cursor - oldCursor); + } + while (menu->cursor > 0 && isspace(menu->filter[menu->cursor - 1])) { + unsigned int oldCursor = menu->cursor; + menu->cursor -= _bmUtf8RunePrev(menu->filter, menu->cursor); + menu->cursesCursor -= _bmUtf8RuneWidth(menu->filter + menu->cursor, oldCursor - menu->cursor); + } + while (menu->cursor > 0 && !isspace(menu->filter[menu->cursor - 1])) { + size_t width; + menu->cursor -= _bmUtf8RuneRemove(menu->filter, menu->cursor, &width); + menu->cursesCursor -= width; + } + } + break; + + case BM_KEY_UNICODE: + { + size_t width; + menu->cursor += _bmUnicodeInsert(menu->filter, sizeof(menu->filter) - 1, menu->cursor, unicode, &width); + menu->cursesCursor += width; + } + break; + + case BM_KEY_TAB: + { + bmItem *selected = bmMenuGetSelectedItem(menu); + if (selected && bmItemGetText(selected)) { + const char *text = bmItemGetText(selected); + size_t len = strlen(text); + + if (len > sizeof(menu->filter) - 1) + len = sizeof(menu->filter) - 1; + + memset(menu->filter, 0, strlen(menu->filter)); + memcpy(menu->filter, text, len); + menu->cursor = strlen(menu->filter); + menu->cursesCursor = _bmUtf8StringScreenWidth(menu->filter); + } + } + break; + + case BM_KEY_RETURN: + return BM_RUN_RESULT_SELECTED; + + case BM_KEY_ESCAPE: + return BM_RUN_RESULT_CANCEL; + + default: break; + } + + if (oldFilter && strcmp(oldFilter, menu->filter)) + _bmMenuFilter(menu); + + if (oldFilter) + free(oldFilter); + return BM_RUN_RESULT_RUNNING; +} + +/* vim: set ts=8 sw=4 tw=0 :*/ -- cgit v1.2.3-70-g09d2