266 lines
8.6 KiB
JavaScript
266 lines
8.6 KiB
JavaScript
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//------------------------------------------------------------------------------
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// Template-Engine
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//------------------------------------------------------------------------------
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'use strict'
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class Generator_cl {
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constructor () {
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this.reset_px();
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}
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reset_px () {
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this.code_a = ['var result_a = [];\n'];
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}
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write_px (text_spl) {
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// Escape-Zeichen bei Strings ergänzen
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var text_s = text_spl.replace(/"/g, '\\"');
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text_s = text_s.replace(/'/g, "\\'");
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this.code_a.push('result_a.push("' + text_s + '");\n');
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}
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code_px (code_spl) {
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if (code_spl.startsWith('if')) {
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this.code_a.push('if (' + code_spl.substr(2) + ') {\n');
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} else if (code_spl.startsWith('else')) {
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this.code_a.push('} else {\n');
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} else if (code_spl.startsWith('endif')) {
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this.code_a.push('}\n');
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} else if (code_spl.startsWith('for')) {
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this.code_a.push('for (' + code_spl.substr(3) + ') {\n');
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} else if (code_spl.startsWith('endfor')) {
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this.code_a.push('}\n');
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} else {
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this.code_a.push(code_spl + '\n');
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}
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}
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substitute_px (subst_spl) {
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let value_s = subst_spl == null ? '' : String(subst_spl);
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this.code_a.push('result_a.push(' + value_s + ');\n');
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}
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generate_px () {
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var result_s = this.code_a.join('') + ' return result_a.join("");';
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var f_o = new Function ('context', result_s);
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return f_o;
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}
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}
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class TemplateCompiler_cl {
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constructor () {
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this.gen_o = new Generator_cl();
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this.reset_px();
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}
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reset_px () {
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this.gen_o.reset_px();
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this.preservePreWS_b = false;
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this.preservePostWS_b = false;
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}
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setPreWS_px (on_bpl) {
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if ((on_bpl == undefined) || (on_bpl == false)) {
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this.preservePreWS_b = false;
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} else {
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this.preservePreWS_b = true;
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}
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}
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setPostWS_px (on_bpl) {
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if ((on_bpl == undefined) || (on_bpl == false)) {
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this.preservePostWS_b = false;
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} else {
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this.preservePostWS_b = true;
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}
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}
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compile_px (source_spl) {
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var state_i = 0;
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var pos_i = 0;
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var len_i = source_spl.length;
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var text_s = '';
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var code_s = '';
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var subst_s = '';
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this.gen_o.reset_px();
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var doubletest_f = function (char_spl) {
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var status_b = false;
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if ((pos_i + 1) < len_i) {
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if ((source_spl[pos_i] == char_spl) && (source_spl[pos_i+1] == char_spl)) {
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status_b = true;
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}
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}
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return status_b;
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}
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while (pos_i < len_i) {
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switch (state_i) {
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case 0:
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// outside
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if (source_spl[pos_i] == '@') { // ECMA 5!
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if (doubletest_f('@') == false) {
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state_i = 2;
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code_s = '';
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} else {
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// als normales Zeichen verarbeiten, ein Zeichen überlesen
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state_i = 1;
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text_s = '@';
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pos_i++;
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}
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} else if (source_spl[pos_i] == '#') {
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if (doubletest_f('#') == false) {
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state_i = 3;
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subst_s = '';
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} else {
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// als normales Zeichen verarbeiten, ein Zeichen überlesen
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state_i = 1;
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text_s = '#';
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pos_i++;
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}
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} else if ((source_spl[pos_i] == ' ') || (source_spl[pos_i] == '\t')) {
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state_i = 4;
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text_s = '';
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pos_i--; // Zeichen erneut verarbeiten
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} else {
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state_i = 1;
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text_s = '';
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pos_i--; // Zeichen erneut verarbeiten
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}
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break;
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case 1:
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// inText
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if (source_spl[pos_i] == '@') {
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if (doubletest_f('@') == false) {
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// Textende, neuer Code
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state_i = 0;
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this.gen_o.write_px(text_s);
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pos_i--; // Zeichen erneut verarbeiten
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} else {
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// als normales Zeichen verarbeiten, ein Zeichen überlesen
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text_s += '@';
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pos_i++;
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}
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} else if (source_spl[pos_i] == '#') {
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if (doubletest_f('#') == false) {
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// Textende, neue Substitution
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state_i = 0;
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this.gen_o.write_px(text_s);
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pos_i--; // Zeichen erneut verarbeiten
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// Textende, neuer Code
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} else {
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// als normales Zeichen verarbeiten, ein Zeichen überlesen
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text_s += '#';
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pos_i++;
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}
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} else if ((source_spl[pos_i] == ' ') || (source_spl[pos_i] == '\t')) {
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// Textende
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state_i = 0;
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this.gen_o.write_px(text_s);
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pos_i--; // Zeichen erneut verarbeiten
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} else {
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// sammeln
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if ((source_spl[pos_i] != '\n') && (source_spl[pos_i] != '\r')) {
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text_s += source_spl[pos_i];
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} else if (source_spl[pos_i] == '\n') {
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text_s += '\\n';
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} else {
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text_s += '\\r';
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}
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}
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break;
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case 2:
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// inCode
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if (source_spl[pos_i] == '@') {
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if (doubletest_f('@') == false) {
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// zu Ende, erzeugen
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this.gen_o.code_px(code_s);
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state_i = 5; //0
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} else {
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// als normales Zeichen verarbeiten, ein Zeichen überlesen
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code_s += '@';
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pos_i++;
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}
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} else {
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// sammeln
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code_s += source_spl[pos_i];
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}
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break;
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case 3:
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// inSubst
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// Verdopplung # hier nicht zulässig!
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if (source_spl[pos_i] == '#') {
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// zu Ende, erzeugen
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this.gen_o.substitute_px(subst_s);
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state_i = 0;
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} else {
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// sammeln
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subst_s += source_spl[pos_i];
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}
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break;
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case 4:
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// pre-code-whitespace
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switch (source_spl[pos_i]) {
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case ' ':
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case '\t':
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// sammeln
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text_s += source_spl[pos_i];
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break;
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default:
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state_i = 0;
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if (source_spl[pos_i] != '@') {
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this.gen_o.write_px(text_s);
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} else {
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if (doubletest_f('@') == false) {
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// Whitespace vor Code-Beginn erkannt
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if (this.preservePreWS_b == true) {
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// trotzdem ausgeben
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this.gen_o.write_px(text_s);
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}
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} // ansonsten wie normales Zeichen behandeln
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}
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pos_i--; // Zeichen erneut verarbeiten
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}
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break;
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case 5:
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// post-code-whitespace
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switch (source_spl[pos_i]) {
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case '\n':
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text_s += '\\n';
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state_i = 0;
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break;
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case '\r':
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text_s += '\\r';
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state_i = 0;
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break;
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case ' ':
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case '\t':
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// ggf. sammeln
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text_s += source_spl[pos_i];
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break;
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default:
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// Whitespace nach Code erkannt
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if (this.preservePostWS_b == true) {
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// trotzdem ausgeben
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this.gen_o.write_px(text_s);
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}
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state_i = 0;
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pos_i--; // Zeichen erneut verarbeiten
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}
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break;
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}
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pos_i++;
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}
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// welcher Zustand liegt abschließend vor?
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if (state_i == 1) {
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this.gen_o.write_px(text_s);
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} else if (state_i == 2) {
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this.gen_o.code_px(code_s);
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} else if (state_i == 3) {
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this.gen_o.substitute_px(subst_s);
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} else if (state_i == 4) {
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if (this.preservePreWS_b == true) {
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this.gen_o.write_px(text_s);
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}
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} else if (state_i == 5) {
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if (this.preservePostWS_b == true) {
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this.gen_o.write_px(text_s);
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}
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}
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return this.gen_o.generate_px();
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}
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}
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// EOF
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