149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
/**
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* @generated SignedSource<<58298c7a8815a8675e970b0347dedfed>>
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*
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* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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* !! This file is a check-in from github! !!
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* !! !!
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* !! You should not modify this file directly. Instead: !!
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* !! 1) Go to https://github.com/facebook/css-layout !!
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* !! 2) Make a pull request and get it merged !!
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* !! 3) Execute ./import.sh to pull in the latest version !!
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* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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*
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* Copyright (c) 2014, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#ifndef __LAYOUT_H
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#define __LAYOUT_H
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#include <math.h>
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#include <stdbool.h>
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#define CSS_UNDEFINED NAN
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typedef enum {
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CSS_FLEX_DIRECTION_COLUMN = 0,
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CSS_FLEX_DIRECTION_ROW
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} css_flex_direction_t;
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typedef enum {
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CSS_JUSTIFY_FLEX_START = 0,
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CSS_JUSTIFY_CENTER,
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CSS_JUSTIFY_FLEX_END,
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CSS_JUSTIFY_SPACE_BETWEEN,
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CSS_JUSTIFY_SPACE_AROUND
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} css_justify_t;
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// Note: auto is only a valid value for alignSelf. It is NOT a valid value for
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// alignItems.
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typedef enum {
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CSS_ALIGN_AUTO = 0,
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CSS_ALIGN_FLEX_START,
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CSS_ALIGN_CENTER,
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CSS_ALIGN_FLEX_END,
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CSS_ALIGN_STRETCH
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} css_align_t;
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typedef enum {
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CSS_POSITION_RELATIVE = 0,
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CSS_POSITION_ABSOLUTE
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} css_position_type_t;
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typedef enum {
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CSS_NOWRAP = 0,
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CSS_WRAP
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} css_wrap_type_t;
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// Note: left and top are shared between position[2] and position[4], so
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// they have to be before right and bottom.
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typedef enum {
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CSS_LEFT = 0,
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CSS_TOP,
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CSS_RIGHT,
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CSS_BOTTOM,
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CSS_POSITION_COUNT
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} css_position_t;
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typedef enum {
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CSS_WIDTH = 0,
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CSS_HEIGHT
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} css_dimension_t;
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typedef struct {
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float position[2];
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float dimensions[2];
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// Instead of recomputing the entire layout every single time, we
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// cache some information to break early when nothing changed
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bool should_update;
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float last_requested_dimensions[2];
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float last_parent_max_width;
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float last_dimensions[2];
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float last_position[2];
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} css_layout_t;
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typedef struct {
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float dimensions[2];
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} css_dim_t;
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typedef struct {
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css_flex_direction_t flex_direction;
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css_justify_t justify_content;
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css_align_t align_items;
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css_align_t align_self;
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css_position_type_t position_type;
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css_wrap_type_t flex_wrap;
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float flex;
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float margin[4];
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float position[4];
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/**
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* You should skip all the rules that contain negative values for the
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* following attributes. For example:
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* {padding: 10, paddingLeft: -5}
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* should output:
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* {left: 10 ...}
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* the following two are incorrect:
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* {left: -5 ...}
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* {left: 0 ...}
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*/
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float padding[4];
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float border[4];
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float dimensions[2];
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} css_style_t;
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typedef struct css_node {
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css_style_t style;
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css_layout_t layout;
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int children_count;
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css_dim_t (*measure)(void *context, float width);
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void (*print)(void *context);
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struct css_node* (*get_child)(void *context, int i);
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bool (*is_dirty)(void *context);
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void *context;
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} css_node_t;
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// Lifecycle of nodes and children
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css_node_t *new_css_node(void);
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void init_css_node(css_node_t *node);
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void free_css_node(css_node_t *node);
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// Print utilities
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typedef enum {
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CSS_PRINT_LAYOUT = 1,
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CSS_PRINT_STYLE = 2,
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CSS_PRINT_CHILDREN = 4,
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} css_print_options_t;
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void print_css_node(css_node_t *node, css_print_options_t options);
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// Function that computes the layout!
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void layoutNode(css_node_t *node, float maxWidth);
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bool isUndefined(float value);
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#endif
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