Chandra
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include/chandra/chandra_splash.h view on Meta::CPAN
/*
* chandra_splash.h — Splash screen support for Chandra
*
* Builds on the child-window infrastructure (chandra_window.h) to provide
* a lightweight splash/loading-screen window with optional progress bar and
* status text updates via JS eval.
*
* Gated by CHANDRA_XS_IMPLEMENTATION (set in Chandra.xs).
* Must be included AFTER chandra_window.h (needs cwin_* functions).
*/
#ifndef CHANDRA_SPLASH_H
#define CHANDRA_SPLASH_H
#ifdef CHANDRA_XS_IMPLEMENTATION
/* Default HTML template used when content is not supplied but progress => 1 */
#define CHANDRA_SPLASH_DEFAULT_TMPL \
"<!DOCTYPE html><html><head><meta charset='utf-8'>" \
"<style>" \
"* { box-sizing: border-box; margin: 0; padding: 0; }" \
"body { display: flex; align-items: center; justify-content: center;" \
" height: 100vh; background: #fff; font-family: -apple-system," \
" BlinkMacSystemFont, 'Segoe UI', sans-serif; }" \
".splash { text-align: center; padding: 40px; width: 100%%; }" \
".splash-title { font-size: 1.4em; font-weight: 600; color: #111;" \
" margin-bottom: 8px; }" \
".splash-status { font-size: 0.9em; color: #666; margin-bottom: 16px;" \
" min-height: 1.2em; }" \
".splash-track { width: 80%%; max-width: 320px; height: 4px;" \
" background: #e0e0e0; border-radius: 2px;" \
" margin: 0 auto; overflow: hidden; }" \
".splash-bar { height: 100%%; width: 0%%; background: #0066cc;" \
" border-radius: 2px; transition: width 0.3s ease; }" \
"</style></head><body>" \
"<div class='splash'>" \
"<div class='splash-title' id='chandra-splash-title'>%s</div>" \
"<div class='splash-status' id='chandra-splash-status'>Loading...</div>" \
"<div class='splash-track'>" \
"<div class='splash-bar' id='chandra-splash-bar'></div>" \
"</div></div></body></html>"
/* Image-only template — base64 src filled in at runtime */
#define CHANDRA_SPLASH_IMAGE_TMPL \
"<!DOCTYPE html><html><head><meta charset='utf-8'>" \
"<style>" \
"* { margin: 0; padding: 0; }" \
"body { display: flex; align-items: center; justify-content: center;" \
" height: 100vh; background: transparent; overflow: hidden; }" \
"img { max-width: 100%%; max-height: 100%%; object-fit: contain; }" \
"</style></head><body><img src='data:%s;base64,%s'></body></html>"
/* JS snippets for live updates — use textContent (safe) not innerHTML */
#define CHANDRA_SPLASH_JS_STATUS \
"var el=document.getElementById('chandra-splash-status');" \
"if(el)el.textContent=%s;"
#define CHANDRA_SPLASH_JS_PROGRESS \
"var el=document.getElementById('chandra-splash-bar');" \
"if(el)el.style.width='%d%%';"
/* ---- Internal helpers ---------------------------------------------------- */
/*
* csplash_js_escape — produce a JS string literal (with quotes) safe for
* embedding in eval'd code. Escapes backslash, single/double quotes, newline,
* carriage return, and control chars. Caller must free() the result.
*/
static char *
csplash_js_escape(const char *input)
{
size_t i, len, out_len;
char *buf, *p;
if (!input) input = "";
len = strlen(input);
/* Worst case: every char becomes \uXXXX (6 chars) + quotes + NUL */
buf = (char *)malloc(len * 6 + 3);
if (!buf) return NULL;
p = buf;
*p++ = '"';
for (i = 0; i < len; i++) {
unsigned char c = (unsigned char)input[i];
switch (c) {
case '\\': *p++ = '\\'; *p++ = '\\'; break;
case '"': *p++ = '\\'; *p++ = '"'; break;
case '\'': *p++ = '\\'; *p++ = '\''; break;
case '\n': *p++ = '\\'; *p++ = 'n'; break;
case '\r': *p++ = '\\'; *p++ = 'r'; break;
case '\t': *p++ = '\\'; *p++ = 't'; break;
default:
if (c < 0x20) {
p += sprintf(p, "\\u%04x", c);
} else {
*p++ = (char)c;
}
}
}
*p++ = '"';
*p = '\0';
return buf;
}
/* ---- Public C API -------------------------------------------------------- */
/*
* csplash_build_html — generate default splash HTML.
( run in 0.743 second using v1.01-cache-2.11-cpan-39bf76dae61 )