--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ui/common/context.c Sun Jan 21 16:30:18 2024 +0100 @@ -0,0 +1,532 @@ +/* + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. + * + * Copyright 2017 Olaf Wintermann. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <inttypes.h> +#include <stdarg.h> + +#include <cx/array_list.h> +#include <cx/compare.h> +#include <cx/mempool.h> + +#include "context.h" +#include "../ui/window.h" +#include "document.h" +#include "types.h" + +static UiContext* global_context; + +void uic_init_global_context(void) { + CxMempool *mp = cxBasicMempoolCreate(32); + global_context = uic_context(NULL, mp); +} + +UiContext* ui_global_context(void) { + return global_context; +} + +UiContext* uic_context(UiObject *toplevel, CxMempool *mp) { + UiContext *ctx = cxMalloc(mp->allocator, sizeof(UiContext)); + memset(ctx, 0, sizeof(UiContext)); + ctx->mp = mp; + ctx->allocator = mp->allocator; + ctx->obj = toplevel; + ctx->vars = cxHashMapCreate(mp->allocator, CX_STORE_POINTERS, 16); + + ctx->documents = cxLinkedListCreate(mp->allocator, cx_cmp_intptr, CX_STORE_POINTERS); + ctx->group_widgets = cxLinkedListCreate(mp->allocator, NULL, sizeof(UiGroupWidget)); + ctx->groups = cxArrayListCreate(mp->allocator, cx_cmp_int, sizeof(int), 32); + + ctx->attach_document = uic_context_attach_document; + ctx->detach_document2 = uic_context_detach_document2; + +#ifdef UI_GTK + if(toplevel && toplevel->widget) { + ctx->accel_group = gtk_accel_group_new(); + gtk_window_add_accel_group(GTK_WINDOW(toplevel->widget), ctx->accel_group); + } +#endif + + return ctx; +} + +UiContext* uic_root_context(UiContext *ctx) { + return ctx->parent ? uic_root_context(ctx->parent) : ctx; +} + +void uic_context_attach_document(UiContext *ctx, void *document) { + cxListAdd(ctx->documents, document); + ctx->document = document; + + UiContext *doc_ctx = ui_document_context(document); + + // check if any parent context has an unbound variable with the same name + // as any document variable + UiContext *var_ctx = ctx; + while(var_ctx) { + if(var_ctx->vars_unbound && var_ctx->vars_unbound->size > 0) { + CxIterator i = cxMapIterator(var_ctx->vars_unbound); + cx_foreach(CxMapEntry*, entry, i) { + UiVar *var = entry->value; + UiVar *docvar = cxMapGet(doc_ctx->vars, *entry->key); + if(docvar) { + // bind var to document var + uic_copy_binding(var, docvar, TRUE); + cxIteratorFlagRemoval(i); + } + } + } + + var_ctx = ctx->parent; + } +} + +static void uic_context_unbind_vars(UiContext *ctx) { + CxIterator i = cxMapIterator(ctx->vars); + cx_foreach(CxMapEntry*, entry, i) { + UiVar *var = entry->value; + if(var->from && var->from_ctx) { + uic_save_var2(var); + uic_copy_binding(var, var->from, FALSE); + cxMapPut(var->from_ctx->vars_unbound, *entry->key, var->from); + var->from_ctx = ctx; + } + } + + if(ctx->documents) { + i = cxListIterator(ctx->documents); + cx_foreach(void *, doc, i) { + UiContext *subctx = ui_document_context(doc); + uic_context_unbind_vars(subctx); + } + } +} + +void uic_context_detach_document2(UiContext *ctx, void *document) { + // find the document in the documents list + ssize_t docIndex = cxListFind(ctx->documents, document); + if(docIndex < 0) { + return; + } + + cxListRemove(ctx->documents, docIndex); + ctx->document = cxListAt(ctx->documents, 0); + + UiContext *docctx = ui_document_context(document); + uic_context_unbind_vars(docctx); // unbind all doc/subdoc vars from the parent +} + +void uic_context_detach_all(UiContext *ctx) { + // copy list + CxList *ls = cxLinkedListCreate(cxDefaultAllocator, NULL, CX_STORE_POINTERS); + CxIterator i = cxListIterator(ctx->documents); + cx_foreach(void *, doc, i) { + cxListAdd(ls, doc); + } + + // detach documents + i = cxListIterator(ls); + cx_foreach(void *, doc, i) { + ctx->detach_document2(ctx, doc); + } + + cxListDestroy(ls); +} + +static UiVar* ctx_getvar(UiContext *ctx, CxHashKey key) { + UiVar *var = cxMapGet(ctx->vars, key); + if(!var) { + CxIterator i = cxListIterator(ctx->documents); + cx_foreach(void *, doc, i) { + UiContext *subctx = ui_document_context(doc); + var = ctx_getvar(subctx, key); + if(var) { + break; + } + } + } + return var; +} + +UiVar* uic_get_var(UiContext *ctx, const char *name) { + CxHashKey key = cx_hash_key(name, strlen(name)); + return ctx_getvar(ctx, key); +} + +UiVar* uic_create_var(UiContext *ctx, const char *name, UiVarType type) { + UiVar *var = uic_get_var(ctx, name); + if(var) { + if(var->type == type) { + return var; + } else { + fprintf(stderr, "UiError: var '%s' already bound with different type\n", name); + } + } + + var = ui_malloc(ctx, sizeof(UiVar)); + var->type = type; + var->value = uic_create_value(ctx, type); + var->from = NULL; + var->from_ctx = ctx; + + cxMempoolRegister(ctx->mp, var, (cx_destructor_func)uic_unbind_var); + + if(!ctx->vars_unbound) { + ctx->vars_unbound = cxHashMapCreate(ctx->allocator, CX_STORE_POINTERS, 16); + } + cxMapPut(ctx->vars_unbound, name, var); + + return var; +} + +UiVar* uic_create_value_var(UiContext* ctx, void* value) { + UiVar *var = (UiVar*)ui_malloc(ctx, sizeof(UiVar)); + var->from = NULL; + var->from_ctx = NULL; + var->value = value; + var->type = UI_VAR_SPECIAL; + return var; +} + +void* uic_create_value(UiContext *ctx, UiVarType type) { + void *val = NULL; + switch(type) { + case UI_VAR_SPECIAL: break; + case UI_VAR_INTEGER: { + val = ui_int_new(ctx, NULL); + break; + } + case UI_VAR_DOUBLE: { + val = ui_double_new(ctx, NULL); + break; + } + case UI_VAR_STRING: { + val = ui_string_new(ctx, NULL); + break; + } + case UI_VAR_TEXT: { + val = ui_text_new(ctx, NULL); + break; + } + case UI_VAR_LIST: { + val = ui_list_new(ctx, NULL); + break; + } + case UI_VAR_RANGE: { + val = ui_range_new(ctx, NULL); + break; + } + } + return val; +} + + +UiVar* uic_widget_var(UiContext* toplevel, UiContext* current, void* value, const char* varname, UiVarType type) { + if (value) { + return uic_create_value_var(current, value); + } + if (varname) { + return uic_create_var(toplevel, varname, type); + } + return NULL; +} + + +void uic_copy_binding(UiVar *from, UiVar *to, UiBool copytodoc) { + // check type + if(from->type != to->type) { + fprintf(stderr, "UI Error: var has incompatible type.\n"); + return; + } + + void *fromvalue = from->value; + // update var + if(copytodoc) { + to->from = from; + to->from_ctx = from->from_ctx; + } + + // copy binding + // we don't copy the observer, because the from var has never one + switch(from->type) { + default: fprintf(stderr, "uic_copy_binding: wtf!\n"); break; + case UI_VAR_SPECIAL: break; + case UI_VAR_INTEGER: { + UiInteger *f = fromvalue; + UiInteger *t = to->value; + if(!f->obj) break; + uic_int_copy(f, t); + t->set(t, t->value); + break; + } + case UI_VAR_DOUBLE: { + UiDouble *f = fromvalue; + UiDouble *t = to->value; + if(!f->obj) break; + uic_double_copy(f, t); + t->set(t, t->value); + break; + } + case UI_VAR_STRING: { + UiString *f = fromvalue; + UiString *t = to->value; + if(!f->obj) break; + uic_string_copy(f, t); + char *tvalue = t->value.ptr ? t->value.ptr : ""; + t->set(t, tvalue); + break; + } + case UI_VAR_TEXT: { + UiText *f = fromvalue; + UiText *t = to->value; + if(!f->obj) break; + uic_text_copy(f, t); + char *tvalue = t->value.ptr ? t->value.ptr : ""; + t->set(t, tvalue); + t->setposition(t, t->pos); + break; + } + case UI_VAR_LIST: { + UiList *f = fromvalue; + UiList *t = to->value; + if(!f->obj) break; + uic_list_copy(f, t); + t->update(t, -1); + break; + } + case UI_VAR_RANGE: { + UiRange *f = fromvalue; + UiRange *t = to->value; + if(!f->obj) break; + uic_range_copy(f, t); + t->setextent(t, t->extent); + t->setrange(t, t->min, t->max); + t->set(t, t->value); + break; + } + } +} + +void uic_save_var2(UiVar *var) { + switch(var->type) { + case UI_VAR_SPECIAL: break; + case UI_VAR_INTEGER: uic_int_save(var->value); break; + case UI_VAR_DOUBLE: uic_double_save(var->value); break; + case UI_VAR_STRING: uic_string_save(var->value); break; + case UI_VAR_TEXT: uic_text_save(var->value); break; + case UI_VAR_LIST: break; + case UI_VAR_RANGE: uic_range_save(var->value); break; + } +} + +void uic_unbind_var(UiVar *var) { + switch(var->type) { + case UI_VAR_SPECIAL: break; + case UI_VAR_INTEGER: uic_int_unbind(var->value); break; + case UI_VAR_DOUBLE: uic_double_unbind(var->value); break; + case UI_VAR_STRING: uic_string_unbind(var->value); break; + case UI_VAR_TEXT: uic_text_unbind(var->value); break; + case UI_VAR_LIST: uic_list_unbind(var->value); break; + case UI_VAR_RANGE: uic_range_unbind(var->value); break; + } +} + +void uic_reg_var(UiContext *ctx, char *name, UiVarType type, void *value) { + // TODO: do we need/want this? Why adding vars to a context after + // widgets reference these? Workarounds: + // 1. add vars to ctx before creating ui + // 2. create ui, create new document with vars, attach doc + // also it would be possible to create a function, that scans unbound vars + // and connects them to available vars + /* + UiContext *rootctx = uic_root_context(ctx); + UiVar *b = NULL; + if(rootctx->bound) { + // some widgets are already bound to some vars + b = ucx_map_cstr_get(rootctx->bound, name); + if(b) { + // a widget is bound to a var with this name + // if ctx is the root context we can remove the var from bound + // because set_doc or detach can't fuck things up + if(ctx == rootctx) { + ucx_map_cstr_remove(ctx->bound, name); + // TODO: free stuff + } + } + } + */ + + // create new var and add it to doc's vars + UiVar *var = ui_malloc(ctx, sizeof(UiVar)); + var->type = type; + var->value = value; + var->from = NULL; + var->from_ctx = ctx; + size_t oldcount = ctx->vars->size; + cxMapPut(ctx->vars, name, var); + if(ctx->vars->size != oldcount + 1) { + fprintf(stderr, "UiError: var '%s' already exists\n", name); + } + + // TODO: remove? + // a widget is already bound to a var with this name + // copy the binding (like uic_context_set_document) + /* + if(b) { + uic_copy_binding(b, var, TRUE); + } + */ +} + +void uic_remove_bound_var(UiContext *ctx, UiVar *var) { + // TODO +} + + +// public API + +void ui_attach_document(UiContext *ctx, void *document) { + uic_context_attach_document(ctx, document); +} + +void ui_detach_document2(UiContext *ctx, void *document) { + uic_context_detach_document2(ctx, document); +} + +void ui_context_closefunc(UiContext *ctx, ui_callback fnc, void *udata) { + ctx->close_callback = fnc; + ctx->close_data = udata; +} + + +void ui_set_group(UiContext *ctx, int group) { + if(cxListFind(ctx->groups, &group) == -1) { + cxListAdd(ctx->groups, &group); + } + + // enable/disable group widgets + uic_check_group_widgets(ctx); +} + +void ui_unset_group(UiContext *ctx, int group) { + int i = cxListFind(ctx->groups, &group); + if(i != -1) { + cxListRemove(ctx->groups, i); + } + + // enable/disable group widgets + uic_check_group_widgets(ctx); +} + +int* ui_active_groups(UiContext *ctx, int *ngroups) { + *ngroups = ctx->groups->size; + return cxListAt(ctx->groups, 0); +} + +void uic_check_group_widgets(UiContext *ctx) { + int ngroups = 0; + int *groups = ui_active_groups(ctx, &ngroups); + + CxIterator i = cxListIterator(ctx->group_widgets); + cx_foreach(UiGroupWidget *, gw, i) { + char *check = calloc(1, gw->numgroups); + + for(int i=0;i<ngroups;i++) { + for(int k=0;k<gw->numgroups;k++) { + if(groups[i] == gw->groups[k]) { + check[k] = 1; + } + } + } + + int enable = 1; + for(int i=0;i<gw->numgroups;i++) { + if(check[i] == 0) { + enable = 0; + break; + } + } + free(check); + gw->enable(gw->widget, enable); + } +} + +void ui_widget_set_groups(UiContext *ctx, UIWIDGET widget, ui_enablefunc enable, ...) { + // get groups + CxList *groups = cxArrayListCreate(cxDefaultAllocator, NULL, sizeof(int), 16); + va_list ap; + va_start(ap, enable); + int group; + while((group = va_arg(ap, int)) != -1) { + cxListAdd(groups, &group); + } + va_end(ap); + + uic_add_group_widget(ctx, widget, enable, groups); + + cxListDestroy(groups); +} + +void uic_add_group_widget(UiContext *ctx, void *widget, ui_enablefunc enable, CxList *groups) { + const CxAllocator *a = ctx->allocator; + UiGroupWidget gw; + + gw.widget = widget; + gw.enable = enable; + gw.numgroups = groups->size; + gw.groups = cxCalloc(a, gw.numgroups, sizeof(int)); + + // copy groups + int *intgroups = cxListAt(groups, 0); + if(intgroups) { + memcpy(gw.groups, intgroups, gw.numgroups * sizeof(int)); + } + + cxListAdd(ctx->group_widgets, &gw); +} + +void* ui_malloc(UiContext *ctx, size_t size) { + return ctx ? cxMalloc(ctx->allocator, size) : NULL; +} + +void* ui_calloc(UiContext *ctx, size_t nelem, size_t elsize) { + return ctx ? cxCalloc(ctx->allocator, nelem, elsize) : NULL; +} + +void ui_free(UiContext *ctx, void *ptr) { + if(ctx) { + cxFree(ctx->allocator, ptr); + } +} + +void* ui_realloc(UiContext *ctx, void *ptr, size_t size) { + return ctx ? cxRealloc(ctx->allocator, ptr, size) : NULL; +} +