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Transform font sizes

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Kovid Goyal 2021-03-19 13:29:59 +05:30
parent 360a081c43
commit 94756715ef
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 25 additions and 9 deletions
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32
src/calibre/srv/fast_css_transform.cpp
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@ -98,6 +98,7 @@ class ParsedNumber {
double float_value; double float_value;
ParsedNumber(integer_type val) : is_integer(true), integer_value(val), float_value(0) {} ParsedNumber(integer_type val) : is_integer(true), integer_value(val), float_value(0) {}
ParsedNumber(double val) : is_integer(false), integer_value(0), float_value(val) {} ParsedNumber(double val) : is_integer(false), integer_value(0), float_value(val) {}
double as_double() const { return is_integer ? (double)integer_value : float_value; }
}; };
static const double base_font_size = 16.0, dpi = 96.0, pt_to_px = dpi / 72.0, pt_to_rem = pt_to_px / base_font_size; static const double base_font_size = 16.0, dpi = 96.0, pt_to_px = dpi / 72.0, pt_to_rem = pt_to_px / base_font_size;
@ -340,25 +341,39 @@ class Token {
void set_text(const PyObject* src) { void set_text(const PyObject* src) {
if (PyUnicode_READY(src) != 0) throw python_error("Failed to set token value from unicode object as readying the unicode obect failed"); if (PyUnicode_READY(src) != 0) throw python_error("Failed to set token value from unicode object as readying the unicode obect failed");
text.clear();
int kind = PyUnicode_KIND(src); void *data = PyUnicode_DATA(src); int kind = PyUnicode_KIND(src); void *data = PyUnicode_DATA(src);
for (Py_ssize_t i = 0; i < PyUnicode_GET_LENGTH(src); i++) text.push_back(PyUnicode_READ(kind, data, i)); text.resize(PyUnicode_GET_LENGTH(src));
for (Py_ssize_t i = 0; i < PyUnicode_GET_LENGTH(src); i++) text[i] = PyUnicode_READ(kind, data, i);
} }
void set_text(const char* src) { void set_text(const char* src) {
text.clear(); text.resize(strlen(src));
while(*src) text.push_back(*(src++)); for (size_t i = 0; i < text.size(); i++) text[i] = src[i];
} }
void set_text(const frozen::string &src) { void set_text(const frozen::string &src) {
text.clear(); text.resize(src.size());
for (size_t i = 0; i < src.size(); i++) text.push_back(src[i]); for (size_t i = 0; i < text.size(); i++) text[i] = src[i];
} }
bool parse_dimension(std::string &scratch) { void set_text(const std::string &src) {
if (!text_as_ascii_lowercase(scratch)) return false; text.resize(src.size());
for (size_t i = 0; i < text.size(); i++) text[i] = src[i];
} }
bool convert_absolute_font_size(std::string &scratch) {
if (!unit_at || !text_as_ascii_lowercase(scratch)) return false;
frozen::string unit(scratch.data() + unit_at, scratch.size() - unit_at);
auto lit = absolute_length_units.find(unit);
if (lit == absolute_length_units.end()) return false;
double val = parse_css_number<std::string>(scratch, unit_at).as_double();
double new_val = convert_font_size(val, lit->second);
if (val == new_val) return false;
scratch.reserve(128); scratch.clear();
scratch.resize(std::snprintf(&scratch[0], scratch.capacity(), "%grem", new_val));
set_text(scratch);
return true;
}
}; };
class TokenQueue { class TokenQueue {
@ -488,6 +503,7 @@ class TokenQueue {
} }
break; break;
case TokenType::dimension: case TokenType::dimension:
if (it->convert_absolute_font_size(scratch2)) changed = true;
break; break;
default: default:
break; break;