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#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "any_log.h"
#include "layout.h"
#include "block.h"
void layout_init(layout_t *layout, block_t *block, layout_info_t info)
{
memset(layout, 0, sizeof(layout_t));
assert(!block->hidden);
layout->block = block;
layout->x = info.x_offset;
layout->y = 0;
layout->x_padding = block->x_padding;
layout->y_padding = block->y_padding;
layout->height = info.height;
layout->line_width = block->line_width;
switch (block->type) {
case BLOCK_TEXT: {
block_text_t *text = (block_text_t *)block;
layout->pl = pango_layout_new(info.context);
pango_layout_set_font_description(layout->pl, info.fontdesc);
pango_layout_set_alignment(layout->pl, text->text_align);
pango_layout_set_height(layout->pl, 0);
pango_layout_set_text(layout->pl, text->text, -1);
pango_layout_get_pixel_size(layout->pl, &layout->text_width, &layout->text_height);
int length = pango_layout_get_character_count(layout->pl);
layout->width = info.height + (length != 1) * layout->text_width;
break;
}
case BLOCK_GROUP: {
block_group_t *group = (block_group_t *)block;
int x_offset = info.x_offset;
layout->children = calloc(group->n_children, sizeof(layout_t));
for (size_t i = 0; i < group->n_children; i++) {
if (group->children[i]->hidden)
continue;
layout_init(&layout->children[layout->n_children], group->children[i], info);
info.x_offset += layout->children[layout->n_children].width + group->spacing;
layout->n_children++;
}
if (group->collapse && layout->n_children == 1) {
layout_t *children = layout->children;
memcpy(layout, children, sizeof(layout_t));
free(children);
} else if (layout->n_children > 0) {
layout_t *last = &layout->children[layout->n_children - 1];
layout->width = last->x + last->width - x_offset;
// NOTE: Temporary solution to make blocks not overlapping correctly
// less noticeable
if (layout->children[0].x_padding == 0) {
layout->x += 1;
layout->width -= 1;
}
if (last->x_padding == 0)
layout->width -= 1;
}
break;
}
case BLOCK_SPEC: {
block_spec_t *spec = (block_spec_t *)block;
// You are on your own
// TODO: Maybe check for layout correctness
spec->layout_fn(block, layout, info);
break;
}
default:
unreachable();
}
if (layout->block->max_width > 0 && layout->width > layout->block->max_width)
layout->width = layout->block->max_width;
if (layout->block->min_width > 0 && layout->width < layout->block->min_width)
layout->width = layout->block->min_width;
}
void layout_render(layout_t *layout, cairo_t *cr)
{
const int radius = layout->height / 2 - layout->y_padding;
int block_x = layout->x + layout->x_padding;
int block_y = layout->y + layout->y_padding;
// Update gradients
cairo_matrix_t matrix;
cairo_matrix_init_scale(&matrix, 1.0 / layout->width, 1.0);
cairo_matrix_translate(&matrix, -layout->x, 0.0);
// Render background
cairo_pattern_t *pattern = layout->block->bg_color.pattern;
if (pattern != NULL) {
render_capsule_fast(cr, block_x, block_y, layout->width - layout->x_padding, radius, radius);
cairo_pattern_set_matrix(pattern, &matrix);
cairo_set_source(cr, pattern);
cairo_fill(cr);
}
// Render border
pattern = layout->block->line_color.pattern;
if (pattern != NULL) {
int line_radius = radius - layout->line_width / 2;
render_capsule_fast(cr, block_x, block_y, layout->width - layout->x_padding, radius, line_radius);
cairo_pattern_set_matrix(pattern, &matrix);
cairo_set_source(cr, pattern);
cairo_set_line_width(cr, layout->block->line_width);
cairo_stroke(cr);
}
switch (layout->block->type) {
case BLOCK_TEXT: {
block_text_t *text = (block_text_t *)layout->block;
assert(layout->n_children == 0);
int text_x = layout->x + (layout->width - layout->text_width + layout->x_padding) / 2;
int text_y = layout->y + (layout->height - layout->text_height) / 2;
color_t color = text->text_color;
cairo_set_source_rgba(cr, color.r, color.g, color.b, color.a);
cairo_move_to(cr, text_x, text_y);
pango_cairo_update_layout(cr, layout->pl);
pango_cairo_show_layout(cr, layout->pl);
break;
}
case BLOCK_GROUP: {
for (size_t i = 0; i < layout->n_children; i++) {
cairo_push_group(cr);
layout_render(&layout->children[i], cr);
cairo_pop_group_to_source(cr);
cairo_paint(cr);
}
break;
}
case BLOCK_SPEC: {
// NOTE: What if a special block adds children to the layout?
// For now do nothing and let them handle it, however
// this is a strange behavior in my opinion...
//
block_spec_t *spec = (block_spec_t *)layout->block;
spec->render_fn(layout, cr);
break;
}
default:
unreachable();
}
}
void layout_free(layout_t *layout)
{
if (layout->pl != NULL)
g_object_unref(layout->pl);
for (size_t i = 0; i < layout->n_children; i++)
layout_free(&layout->children[i]);
free(layout->children);
}
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