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js: Tolerate the absence of various UI elements from the HTML

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To make things more consistent, the static buttons now all have their
own variables.
This commit is contained in:
Ben Harris
2022-12-11 12:17:54 +00:00
parent 48ded126a9
commit 5ba1bf5560
2 changed files with 24 additions and 15 deletions
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27
emccpre.js
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@ -146,9 +146,16 @@ var menuform = document.getElementById("gamemenu");
var permalink_seed = document.getElementById("permalink-seed");
var permalink_desc = document.getElementById("permalink-desc");
// The undo and redo buttons. Used by js_enable_undo_redo().
// The various buttons. Undo and redo are used by js_enable_undo_redo().
var specific_button = document.getElementById("specific");
var random_button = document.getElementById("random");
var new_button = document.getElementById("new");
var restart_button = document.getElementById("restart");
var undo_button = document.getElementById("undo");
var redo_button = document.getElementById("redo");
var solve_button = document.getElementById("solve");
var save_button = document.getElementById("save");
var load_button = document.getElementById("load");
// A div element enclosing both the puzzle and its status bar, used
// for positioning the resize handle.
@ -359,34 +366,34 @@ function initPuzzle() {
command = Module.cwrap('command', 'void', ['number']);
// Event handlers for buttons and things, which call command().
document.getElementById("specific").onclick = function(event) {
if (specific_button) specific_button.onclick = function(event) {
// Ensure we don't accidentally process these events when a
// dialog is actually active, e.g. because the button still
// has keyboard focus
if (dlg_dimmer === null)
command(0);
};
document.getElementById("random").onclick = function(event) {
if (random_button) random_button.onclick = function(event) {
if (dlg_dimmer === null)
command(1);
};
document.getElementById("new").onclick = function(event) {
if (new_button) new_button.onclick = function(event) {
if (dlg_dimmer === null)
command(5);
};
document.getElementById("restart").onclick = function(event) {
if (restart_button) restart_button.onclick = function(event) {
if (dlg_dimmer === null)
command(6);
};
undo_button.onclick = function(event) {
if (undo_button) undo_button.onclick = function(event) {
if (dlg_dimmer === null)
command(7);
};
redo_button.onclick = function(event) {
if (redo_button) redo_button.onclick = function(event) {
if (dlg_dimmer === null)
command(8);
};
document.getElementById("solve").onclick = function(event) {
if (solve_button) solve_button.onclick = function(event) {
if (dlg_dimmer === null)
command(9);
};
@ -396,7 +403,7 @@ function initPuzzle() {
var free_save_file = Module.cwrap('free_save_file', 'void', ['number']);
var load_game = Module.cwrap('load_game', 'void', ['string', 'number']);
document.getElementById("save").onclick = function(event) {
if (save_button) save_button.onclick = function(event) {
if (dlg_dimmer === null) {
var savefile_ptr = get_save_file();
var savefile_text = UTF8ToString(savefile_ptr);
@ -418,7 +425,7 @@ function initPuzzle() {
}
};
document.getElementById("load").onclick = function(event) {
if (load_button) load_button.onclick = function(event) {
if (dlg_dimmer === null) {
var input = document.createElement("input");
input.type = "file";