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author | Vincent Sanders <vince@netsurf-browser.org> | 2010-12-05 17:22:06 +0000 |
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committer | Vincent Sanders <vince@netsurf-browser.org> | 2010-12-05 17:22:06 +0000 |
commit | 97449b2e23ef5252cb4f766d9215d14e763a0732 (patch) | |
tree | 8eca8edc44aa19f384ff6fc48b868c5a9a7a5f21 /src/select/properties/background_position.c | |
parent | 9ff129943ec479fa51b95e84b6e8c042a44363ae (diff) | |
download | libcss-97449b2e23ef5252cb4f766d9215d14e763a0732.tar.gz libcss-97449b2e23ef5252cb4f766d9215d14e763a0732.tar.bz2 |
Split up properties selectors
svn path=/trunk/libcss/; revision=11011
Diffstat (limited to 'src/select/properties/background_position.c')
-rw-r--r-- | src/select/properties/background_position.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/src/select/properties/background_position.c b/src/select/properties/background_position.c new file mode 100644 index 0000000..56125e3 --- /dev/null +++ b/src/select/properties/background_position.c @@ -0,0 +1,129 @@ +/* + * 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_background_position(uint32_t opv, css_style *style, + css_select_state *state) +{ + uint16_t value = CSS_BACKGROUND_POSITION_INHERIT; + css_fixed hlength = 0; + css_fixed vlength = 0; + uint32_t hunit = UNIT_PX; + uint32_t vunit = UNIT_PX; + + if (isInherit(opv) == false) { + value = CSS_BACKGROUND_POSITION_SET; + + switch (getValue(opv) & 0xf0) { + case BACKGROUND_POSITION_HORZ_SET: + hlength = *((css_fixed *) style->bytecode); + advance_bytecode(style, sizeof(hlength)); + hunit = *((uint32_t *) style->bytecode); + advance_bytecode(style, sizeof(hunit)); + break; + case BACKGROUND_POSITION_HORZ_CENTER: + hlength = INTTOFIX(50); + hunit = UNIT_PCT; + break; + case BACKGROUND_POSITION_HORZ_RIGHT: + hlength = INTTOFIX(100); + hunit = UNIT_PCT; + break; + case BACKGROUND_POSITION_HORZ_LEFT: + hlength = INTTOFIX(0); + hunit = UNIT_PCT; + break; + } + + switch (getValue(opv) & 0x0f) { + case BACKGROUND_POSITION_VERT_SET: + vlength = *((css_fixed *) style->bytecode); + advance_bytecode(style, sizeof(vlength)); + vunit = *((uint32_t *) style->bytecode); + advance_bytecode(style, sizeof(vunit)); + break; + case BACKGROUND_POSITION_VERT_CENTER: + vlength = INTTOFIX(50); + vunit = UNIT_PCT; + break; + case BACKGROUND_POSITION_VERT_BOTTOM: + vlength = INTTOFIX(100); + vunit = UNIT_PCT; + break; + case BACKGROUND_POSITION_VERT_TOP: + vlength = INTTOFIX(0); + vunit = UNIT_PCT; + break; + } + } + + hunit = to_css_unit(hunit); + vunit = to_css_unit(vunit); + + if (outranks_existing(getOpcode(opv), isImportant(opv), state, + isInherit(opv))) { + return set_background_position(state->result, value, + hlength, hunit, vlength, vunit); + } + + return CSS_OK; +} + +css_error set_background_position_from_hint(const css_hint *hint, + css_computed_style *style) +{ + return set_background_position(style, hint->status, + hint->data.position.h.value, hint->data.position.h.unit, + hint->data.position.v.value, hint->data.position.v.unit); +} + +css_error initial_background_position(css_select_state *state) +{ + return set_background_position(state->result, + CSS_BACKGROUND_POSITION_SET, + 0, CSS_UNIT_PCT, 0, CSS_UNIT_PCT); +} + +css_error compose_background_position(const css_computed_style *parent, + const css_computed_style *child, + css_computed_style *result) +{ + css_fixed hlength = 0, vlength = 0; + css_unit hunit = CSS_UNIT_PX, vunit = CSS_UNIT_PX; + uint8_t type = get_background_position(child, &hlength, &hunit, + &vlength, &vunit); + + if (type == CSS_BACKGROUND_POSITION_INHERIT) { + type = get_background_position(parent, + &hlength, &hunit, &vlength, &vunit); + } + + return set_background_position(result, type, hlength, hunit, + vlength, vunit); +} + + +uint32_t destroy_background_position(void *bytecode) +{ + uint32_t value = getValue(*((uint32_t*)bytecode)); + uint32_t extra_size = 0; + + if ((value & 0x0f) == BACKGROUND_POSITION_VERT_SET) + extra_size += sizeof(css_fixed) + sizeof(uint32_t); + if ((value & 0xf0) == BACKGROUND_POSITION_HORZ_SET) + extra_size += sizeof(css_fixed) + sizeof(uint32_t); + + return sizeof(uint32_t) + extra_size; +} |