diff options
Diffstat (limited to 'src/select/properties/line_height.c')
-rw-r--r-- | src/select/properties/line_height.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/src/select/properties/line_height.c b/src/select/properties/line_height.c new file mode 100644 index 0000000..b292ddb --- /dev/null +++ b/src/select/properties/line_height.c @@ -0,0 +1,89 @@ +/* + * This file is part of LibCSS + * Licensed under the MIT License, + * http://www.opensource.org/licenses/mit-license.php + * Copyright 2009 John-Mark Bell <jmb@netsurf-browser.org> + */ + +#include "bytecode/bytecode.h" +#include "bytecode/opcodes.h" +#include "select/propset.h" +#include "select/propget.h" +#include "utils/utils.h" + +#include "select/properties/properties.h" +#include "select/properties/helpers.h" + +css_error cascade_line_height(uint32_t opv, css_style *style, + css_select_state *state) +{ + uint16_t value = CSS_LINE_HEIGHT_INHERIT; + css_fixed val = 0; + uint32_t unit = UNIT_PX; + + if (isInherit(opv) == false) { + switch (getValue(opv)) { + case LINE_HEIGHT_NUMBER: + value = CSS_LINE_HEIGHT_NUMBER; + val = *((css_fixed *) style->bytecode); + advance_bytecode(style, sizeof(val)); + break; + case LINE_HEIGHT_DIMENSION: + value = CSS_LINE_HEIGHT_DIMENSION; + val = *((css_fixed *) style->bytecode); + advance_bytecode(style, sizeof(val)); + unit = *((uint32_t *) style->bytecode); + advance_bytecode(style, sizeof(unit)); + break; + case LINE_HEIGHT_NORMAL: + value = CSS_LINE_HEIGHT_NORMAL; + break; + } + } + + unit = to_css_unit(unit); + + if (outranks_existing(getOpcode(opv), isImportant(opv), state, + isInherit(opv))) { + return set_line_height(state->result, value, val, unit); + } + + return CSS_OK; +} + +css_error set_line_height_from_hint(const css_hint *hint, + css_computed_style *style) +{ + return set_line_height(style, hint->status, + hint->data.length.value, hint->data.length.unit); +} + +css_error initial_line_height(css_select_state *state) +{ + return set_line_height(state->result, CSS_LINE_HEIGHT_NORMAL, + 0, CSS_UNIT_PX); +} + +css_error compose_line_height(const css_computed_style *parent, + const css_computed_style *child, + css_computed_style *result) +{ + css_fixed length = 0; + css_unit unit = CSS_UNIT_PX; + uint8_t type = get_line_height(child, &length, &unit); + + if (type == CSS_LINE_HEIGHT_INHERIT) { + type = get_line_height(parent, &length, &unit); + } + + return set_line_height(result, type, length, unit); +} + +uint32_t destroy_line_height(void *bytecode) +{ + uint32_t value = getValue(*((uint32_t*)bytecode)); + if (value == LINE_HEIGHT_NUMBER) + return generic_destroy_number(bytecode); + else + return generic_destroy_length(bytecode); +} |