diff options
Diffstat (limited to 'src/select/select.c')
| -rw-r--r-- | src/select/select.c | 261 |
1 files changed, 200 insertions, 61 deletions
diff --git a/src/select/select.c b/src/select/select.c index c8567f8..06ed2bf 100644 --- a/src/select/select.c +++ b/src/select/select.c @@ -44,8 +44,7 @@ struct css_select_ctx { css_select_sheet *sheets; /**< Array of sheets */ - css_allocator_fn alloc; /**< Allocation routine */ - void *pw; /**< Client-specific private data */ + void *pw; /**< Client's private selection context */ /* Useful interned strings */ lwc_string *universal; @@ -141,7 +140,7 @@ static css_error match_detail(css_select_ctx *ctx, void *node, bool *match, css_pseudo_element *pseudo_element); static css_error cascade_style(const css_style *style, css_select_state *state); -static css_error select_font_faces_from_sheet(css_select_ctx *ctx, +static css_error select_font_faces_from_sheet( const css_stylesheet *sheet, css_origin origin, css_select_font_faces_state *state); @@ -151,24 +150,87 @@ static void dump_chain(const css_selector *selector); #endif +/* Exported function documented in public select.h header. */ +css_error css_libcss_node_data_handler(css_select_handler *handler, + css_node_data_action action, void *pw, void *node, + void *clone_node, void *libcss_node_data) +{ + css_bloom *bloom = libcss_node_data; + css_bloom *clone_bloom = NULL; + css_error error; + unsigned int i; + + if (handler == NULL || libcss_node_data == NULL || + handler->handler_version != CSS_SELECT_HANDLER_VERSION_1) { + return CSS_BADPARM; + } + + switch (action) { + case CSS_NODE_DELETED: + free(bloom); + break; + + case CSS_NODE_MODIFIED: + case CSS_NODE_ANCESTORS_MODIFIED: + if (node == NULL) { + return CSS_BADPARM; + } + + free(bloom); + + /* Don't bother rebuilding bloom here, it can be done + * when the node is selected for. Just ensure the + * client drops its reference to the libcss_node_data. */ + error = handler->set_libcss_node_data(pw, node, NULL); + if (error != CSS_OK) { + return error; + } + break; + + case CSS_NODE_CLONED: + if (node == NULL || clone_node == NULL) { + return CSS_BADPARM; + } + + clone_bloom = malloc(sizeof(css_bloom) * CSS_BLOOM_SIZE); + if (clone_bloom == NULL) { + return CSS_NOMEM; + } + + for (i = 0; i < CSS_BLOOM_SIZE; i++) { + clone_bloom[i] = bloom[i]; + } + + error = handler->set_libcss_node_data(pw, clone_node, + clone_bloom); + if (error != CSS_OK) { + free(clone_bloom); + return error; + } + break; + + default: + return CSS_BADPARM; + } + + return CSS_OK; +} + /** * Create a selection context * - * \param alloc Memory (de)allocation function - * \param pw Client-specific private data * \param result Pointer to location to receive created context * \return CSS_OK on success, appropriate error otherwise. */ -css_error css_select_ctx_create(css_allocator_fn alloc, void *pw, - css_select_ctx **result) +css_error css_select_ctx_create(css_select_ctx **result) { css_select_ctx *c; css_error error; - if (alloc == NULL || result == NULL) + if (result == NULL) return CSS_BADPARM; - c = alloc(NULL, sizeof(css_select_ctx), pw); + c = malloc(sizeof(css_select_ctx)); if (c == NULL) return CSS_NOMEM; @@ -176,13 +238,10 @@ css_error css_select_ctx_create(css_allocator_fn alloc, void *pw, error = intern_strings(c); if (error != CSS_OK) { - alloc(c, 0, pw); + free(c); return error; } - c->alloc = alloc; - c->pw = pw; - *result = c; return CSS_OK; @@ -202,9 +261,9 @@ css_error css_select_ctx_destroy(css_select_ctx *ctx) destroy_strings(ctx); if (ctx->sheets != NULL) - ctx->alloc(ctx->sheets, 0, ctx->pw); + free(ctx->sheets); - ctx->alloc(ctx, 0, ctx->pw); + free(ctx); return CSS_OK; } @@ -257,9 +316,8 @@ css_error css_select_ctx_insert_sheet(css_select_ctx *ctx, if (index > ctx->n_sheets) return CSS_INVALID; - temp = ctx->alloc(ctx->sheets, - (ctx->n_sheets + 1) * sizeof(css_select_sheet), - ctx->pw); + temp = realloc(ctx->sheets, + (ctx->n_sheets + 1) * sizeof(css_select_sheet)); if (temp == NULL) return CSS_NOMEM; @@ -373,7 +431,6 @@ css_error css_select_ctx_get_sheet(css_select_ctx *ctx, uint32_t index, * update the fully computed style for a node when layout changes. */ css_error css_select_style(css_select_ctx *ctx, void *node, - const css_bloom bloom[CSS_BLOOM_SIZE], uint64_t media, const css_stylesheet *inline_style, css_select_handler *handler, void *pw, css_select_results **result) @@ -382,10 +439,11 @@ css_error css_select_style(css_select_ctx *ctx, void *node, css_error error; css_select_state state; void *parent = NULL; + css_bloom *bloom = NULL; + css_bloom *parent_bloom = NULL; if (ctx == NULL || node == NULL || result == NULL || handler == NULL || - handler->handler_version != - CSS_SELECT_HANDLER_VERSION_1) + handler->handler_version != CSS_SELECT_HANDLER_VERSION_1) return CSS_BADPARM; /* Set up the selection state */ @@ -396,31 +454,68 @@ css_error css_select_style(css_select_ctx *ctx, void *node, state.pw = pw; state.next_reject = state.reject_cache + (N_ELEMENTS(state.reject_cache) - 1); - state.bloom = bloom; /* Allocate the result set */ - state.results = ctx->alloc(NULL, sizeof(css_select_results), ctx->pw); + state.results = malloc(sizeof(css_select_results)); if (state.results == NULL) return CSS_NOMEM; - state.results->alloc = ctx->alloc; - state.results->pw = ctx->pw; - for (i = 0; i < CSS_PSEUDO_ELEMENT_COUNT; i++) state.results->styles[i] = NULL; /* Base element style is guaranteed to exist */ - error = css_computed_style_create(ctx->alloc, ctx->pw, + error = css_computed_style_create( &state.results->styles[CSS_PSEUDO_ELEMENT_NONE]); if (error != CSS_OK) { - ctx->alloc(state.results, 0, ctx->pw); + free(state.results); return error; } + /* Create the node's bloom */ + bloom = calloc(sizeof(css_bloom), CSS_BLOOM_SIZE); + if (bloom == NULL) { + error = CSS_NOMEM; + goto cleanup; + } + error = handler->parent_node(pw, node, &parent); if (error != CSS_OK) goto cleanup; + /* Get parent node's bloom filter */ + if (parent != NULL) { + /* Get parent bloom filter */ + error = handler->get_libcss_node_data(pw, parent, + (void **) &state.bloom); + if (error != CSS_OK) + goto cleanup; + /* TODO: + * If state.bloom == NULL, build and set parent bloom. + */ + } + + if (state.bloom == NULL) { + /* Need to create parent bloom */ + parent_bloom = malloc(sizeof(css_bloom) * CSS_BLOOM_SIZE); + if (parent_bloom == NULL) { + error = CSS_NOMEM; + goto cleanup; + } + if (parent != NULL) { + /* Have to make up fully saturated bloom filter */ + for (i = 0; i < CSS_BLOOM_SIZE; i++) { + parent_bloom[i] = ~0; + } + } else { + /* Empty bloom filter */ + for (i = 0; i < CSS_BLOOM_SIZE; i++) { + parent_bloom[i] = 0; + } + } + + state.bloom = parent_bloom; + } + /* Get node's name */ error = handler->node_name(pw, node, &state.element); if (error != CSS_OK) @@ -432,10 +527,7 @@ css_error css_select_style(css_select_ctx *ctx, void *node, goto cleanup; /* Get node's classes, if any */ - /** \todo Do we really want to force the client to allocate a new array - * every time we call this? It seems hugely inefficient, given they can - * cache the data. */ - error = handler->node_classes(pw, node, + error = handler->node_classes(pw, node, &state.classes, &state.n_classes); if (error != CSS_OK) goto cleanup; @@ -550,6 +642,57 @@ css_error css_select_style(css_select_ctx *ctx, void *node, goto cleanup; } + /* Add node name to bloom */ + if (state.element.name->insensitive == NULL) { + if (lwc__intern_caseless_string( + state.element.name) != lwc_error_ok) { + error = CSS_NOMEM; + goto cleanup; + } + } + css_bloom_add_hash(bloom, lwc_string_hash_value( + state.element.name->insensitive)); + + /* Add id name to bloom */ + if (state.id != NULL) { + if (state.id->insensitive == NULL) { + if (lwc__intern_caseless_string(state.id) != + lwc_error_ok) { + error = CSS_NOMEM; + goto cleanup; + } + } + css_bloom_add_hash(bloom, lwc_string_hash_value( + state.id->insensitive)); + } + + /* Add class names to bloom */ + if (state.classes != NULL) { + lwc_string *s; + for (i = 0; i < state.n_classes; i++) { + s = state.classes[i]; + if (s->insensitive == NULL) { + if (lwc__intern_caseless_string(s) != + lwc_error_ok) { + error = CSS_NOMEM; + goto cleanup; + } + } + css_bloom_add_hash(bloom, lwc_string_hash_value( + s->insensitive)); + } + } + + /* Merge parent bloom into node bloom */ + css_bloom_merge(state.bloom, bloom); + + /* Set node bloom filter */ + error = handler->set_libcss_node_data(pw, node, bloom); + if (error != CSS_OK) + goto cleanup; + + bloom = NULL; + *result = state.results; error = CSS_OK; @@ -561,11 +704,17 @@ cleanup: css_select_results_destroy(state.results); } + if (parent_bloom != NULL) { + free(parent_bloom); + } + + if (bloom != NULL) { + free(bloom); + } + if (state.classes != NULL) { for (i = 0; i < state.n_classes; i++) lwc_string_unref(state.classes[i]); - - ctx->alloc(state.classes, 0, ctx->pw); } if (state.id != NULL) @@ -596,7 +745,7 @@ css_error css_select_results_destroy(css_select_results *results) css_computed_style_destroy(results->styles[i]); } - results->alloc(results, 0, results->pw); + free(results); return CSS_OK; } @@ -634,7 +783,7 @@ css_error css_select_font_faces(css_select_ctx *ctx, if ((s.media & media) != 0 && s.sheet->disabled == false) { - error = select_font_faces_from_sheet(ctx, s.sheet, + error = select_font_faces_from_sheet(s.sheet, s.origin, &state); if (error != CSS_OK) goto cleanup; @@ -651,22 +800,16 @@ css_error css_select_font_faces(css_select_ctx *ctx, * the font faces in priority order. */ css_select_font_faces_results *results; - results = ctx->alloc(NULL, - sizeof(css_select_font_faces_results), - ctx->pw); + results = malloc(sizeof(css_select_font_faces_results)); if (results == NULL) { error = CSS_NOMEM; goto cleanup; } - results->alloc = ctx->alloc; - results->pw = ctx->pw; - - results->font_faces = ctx->alloc(NULL, - n_font_faces * sizeof(css_font_face *), - ctx->pw); + results->font_faces = malloc( + n_font_faces * sizeof(css_font_face *)); if (results->font_faces == NULL) { - ctx->alloc(results, 0, ctx->pw); + free(results); error = CSS_NOMEM; goto cleanup; } @@ -705,13 +848,13 @@ css_error css_select_font_faces(css_select_ctx *ctx, cleanup: if (state.ua_font_faces.count != 0) - ctx->alloc(state.ua_font_faces.font_faces, 0, ctx->pw); + free(state.ua_font_faces.font_faces); if (state.user_font_faces.count != 0) - ctx->alloc(state.user_font_faces.font_faces, 0, ctx->pw); + free(state.user_font_faces.font_faces); if (state.author_font_faces.count != 0) - ctx->alloc(state.author_font_faces.font_faces, 0, ctx->pw); + free(state.author_font_faces.font_faces); return error; } @@ -731,10 +874,10 @@ css_error css_select_font_faces_results_destroy( if (results->font_faces != NULL) { /* Don't destroy the individual css_font_faces, they're owned by their respective sheets */ - results->alloc(results->font_faces, 0, results->pw); + free(results->font_faces); } - results->alloc(results, 0, results->pw); + free(results); return CSS_OK; } @@ -1136,7 +1279,7 @@ static inline bool _rule_applies_to_media(const css_rule *rule, uint64_t media) return applies; } -static css_error _select_font_face_from_rule(css_select_ctx *ctx, +static css_error _select_font_face_from_rule( const css_rule_font_face *rule, css_origin origin, css_select_font_faces_state *state) { @@ -1168,8 +1311,7 @@ static css_error _select_font_face_from_rule(css_select_ctx *ctx, index = faces->count++; new_size = faces->count * sizeof(css_font_face *); - new_faces = ctx->alloc(faces->font_faces, - new_size, ctx->pw); + new_faces = realloc(faces->font_faces, new_size); if (new_faces == NULL) { faces->count = 0; return CSS_NOMEM; @@ -1183,7 +1325,7 @@ static css_error _select_font_face_from_rule(css_select_ctx *ctx, return CSS_OK; } -static css_error select_font_faces_from_sheet(css_select_ctx *ctx, +static css_error select_font_faces_from_sheet( const css_stylesheet *sheet, css_origin origin, css_select_font_faces_state *state) @@ -1223,7 +1365,6 @@ static css_error select_font_faces_from_sheet(css_select_ctx *ctx, css_error error; error = _select_font_face_from_rule( - ctx, (const css_rule_font_face *) rule, origin, state); @@ -1367,9 +1508,7 @@ css_error match_selectors_in_sheet(css_select_ctx *ctx, if (state->classes != NULL && n_classes > 0) { /* Find hash chains for node classes */ - class_selectors = ctx->alloc(NULL, - n_classes * sizeof(css_selector **), - ctx->pw); + class_selectors = malloc(n_classes * sizeof(css_selector **)); if (class_selectors == NULL) { error = CSS_NOMEM; goto cleanup; @@ -1455,7 +1594,7 @@ css_error match_selectors_in_sheet(css_select_ctx *ctx, error = CSS_OK; cleanup: if (class_selectors != NULL) - ctx->alloc(class_selectors, 0, ctx->pw); + free(class_selectors); return error; } @@ -1571,7 +1710,7 @@ css_error match_selector_chain(css_select_ctx *ctx, /* Ensure that the appropriate computed style exists */ if (state->results->styles[pseudo] == NULL) { - error = css_computed_style_create(ctx->alloc, ctx->pw, + error = css_computed_style_create( &state->results->styles[pseudo]); if (error != CSS_OK) return error; |