X-Git-Url: https://gitweb.ps.run/iftint/blobdiff_plain/019601bd93d99698c528f57a6a356944b1e46517..5ac301b38e25d0080849a1e60cdc115c33edf87d:/main2.c

diff --git a/main2.c b/main2.c
index 47e11ee..80f6a17 100644
--- a/main2.c
+++ b/main2.c
@@ -2,6 +2,11 @@
 #include <stdarg.h>
 #include <string.h>
 #include <stdlib.h>
+#include <stdbool.h>
+
+/* TODO
+- whitelist input on GetStr/GetInt
+*/
 
 // Memory
 
@@ -9,11 +14,33 @@
 #define NEWARR(TYPE, NUM) ((TYPE *)calloc(NUM, sizeof(TYPE)))
 
 
-// getch()
+// Util
+
+bool
+charInString(char c, const char * str) {
+    for (int i = 0; i < strlen(str); i++)
+        if (c == str[i])
+            return true;
+    return false;
+}
+
+bool
+isNewline(char c) {
+    return c == '\n' || c == '\r';
+}
+bool
+isBackspace(char c) {
+    return c == 8 || c == 127;
+}
+
+
+// getch
 
 #ifdef _WIN32
+#include <windows.h>
 #include <conio.h>
 #else
+#include <sys/ioctl.h>
 #include <termios.h>
 #include <unistd.h>
 #include <stdio.h>
@@ -25,21 +52,7 @@ int getch(void)
     int ch;
     tcgetattr( STDIN_FILENO, &oldattr );
     newattr = oldattr;
-    newattr.c_lflag &= ~( ICANON | ECHO );
-    tcsetattr( STDIN_FILENO, TCSANOW, &newattr );
-    ch = getchar();
-    tcsetattr( STDIN_FILENO, TCSANOW, &oldattr );
-    return ch;
-}
-
-/* reads from keypress, echoes */
-int getche(void)
-{
-    struct termios oldattr, newattr;
-    int ch;
-    tcgetattr( STDIN_FILENO, &oldattr );
-    newattr = oldattr;
-    newattr.c_lflag &= ~( ICANON );
+    newattr.c_lflag &= ~( ICANON | ECHO ); // no ECHO for echo(?)
     tcsetattr( STDIN_FILENO, TCSANOW, &newattr );
     ch = getchar();
     tcsetattr( STDIN_FILENO, TCSANOW, &oldattr );
@@ -85,14 +98,42 @@ void vt100CursorHome() { vt100Escape("[H"); }
 void vt100CursorPos(int v, int h) { vt100Escape("[%d;%dH", v, h); }
 void vt100SaveCursor() { vt100Escape("7"); }
 void vt100RestoreCursor() { vt100Escape("8"); }
+// void vt100GetCursor(int * v, int * h) {
+//     *v = *h = 0;
+//     printf("\033[6n");
+//     getch(); getch();
+//     int c;
+//     while ((c = getch()) != ';')
+//         *v = (10*(*v)+(c-'0'));
+//     while ((c = getch()) != 'R')
+//         *h = (10*(*h)+(c-'0'));
+// }
+void vt100GetScreenSize(int * v, int * h) {
+#ifdef _WIN32
+    CONSOLE_SCREEN_BUFFER_INFO csbi;
+    GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi);
+    *h = csbi.srWindow.Right - csbi.srWindow.Left + 1;
+    *v = csbi.srWindow.Bottom - csbi.srWindow.Top + 1;
+#else
+    struct winsize w;
+    ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
+    *h = w.ws_row;
+    *v = w.ws_col;
+#endif
+}
+void vt100EnableAlternateBuffer() { vt100Escape("[?1049h"); }
+void vt100DisableAlternateBuffer() { vt100Escape("[?1049l"); }
 
 
 // JSON
 
 typedef enum {
     JSONNodeKind_Nul,
+    JSONNodeKind_Int,
     JSONNodeKind_Str,
     JSONNodeKind_Obj,
+    JSONNodeKind_Arr,
+    JSONNodeKind_COUNT
 } JSONNodeKind;
 
 struct JSONNode;
@@ -100,50 +141,53 @@ typedef struct JSONNode {
     JSONNodeKind kind;
     size_t data;
     struct JSONNode * parent;
-    struct JSONNode * children;
+    struct JSONNode * firstChild;
+    int childCount;
+    struct JSONNode * prev;
     struct JSONNode * next;
 } JSONNode;
 
 JSONNode *
-JSONNodeNew(JSONNodeKind kind, size_t data) {
+JSONNodeNew(JSONNodeKind kind) {
     JSONNode * result = NEW(JSONNode);
     result->kind = kind;
-    result->data = data;
     return result;
 }
 
 JSONNode *
-JSONNodeNewStr(const char * str) {
-    return JSONNodeNew(JSONNodeKind_Str, (size_t)str);
-}
-
-JSONNode *
-JSONNodeNewObj() {
-    return JSONNodeNew(JSONNodeKind_Obj, (size_t)NULL);
-}
-
-JSONNode *
-JSONNodeNewNul() {
-    return JSONNodeNew(JSONNodeKind_Nul, (size_t)NULL);
-}
-
-JSONNode *
-JSONNodeAppend(JSONNode * this, JSONNode * that) {
-    if (this->children == NULL) {
-        this->children = that;
+JSONNodePush(JSONNode * this, JSONNode * that) {
+    if (this->firstChild == NULL) {
+        this->firstChild = that;
     }
     else {
-        JSONNode * lastNode = this->children;
+        JSONNode * lastNode = this->firstChild;
         while (lastNode->next != NULL)
             lastNode = lastNode->next;
         lastNode->next = that;
+        that->prev = lastNode;
     }
+    this->childCount++;
     that->parent = this;
-    that->next = NULL;
     
     return that;
 }
 
+JSONNode *
+JSONNodeRemove(JSONNode * node) {
+    if (node->prev == NULL) { // first child
+        node->parent->firstChild = node->next;
+        if (node->next != NULL)
+            node->next->prev = NULL;
+        return node->parent;
+    }
+    else { // second child
+        node->prev->next = node->next;
+        if (node->next != NULL)
+            node->next->prev = node->prev;
+        return node->prev;
+    }
+}
+
 void
 Indent(int indent) {
     for (int i = 0; i < indent; i++)
@@ -151,19 +195,28 @@ Indent(int indent) {
 }
 
 void
-JSONNodePrint(JSONNode * node) {
+JSONNodePrint(JSONNode * node, JSONNode * currNode) {
     if (node == NULL)
         return;
     
     static int indent;
     if (node->parent == NULL)
         indent = 0;
-    
+
+    if (currNode == node) {
+        vt100SaveCursor();
+    }
+
     switch (node->kind) {
     case JSONNodeKind_Nul: {
         printf("null");
         break;
     }
+    case JSONNodeKind_Int: {
+        char * str = (char *)node->data;
+        printf("%s", (str == NULL || strlen(str) == 0) ? "0" : str);
+        break;
+    }
     case JSONNodeKind_Str: {
         char * str = (char *)node->data;
         printf("\"%s\"", str == NULL ? "" : str);
@@ -171,136 +224,167 @@ JSONNodePrint(JSONNode * node) {
     }
     case JSONNodeKind_Obj: {
         printf("{\n");
-        JSONNode * ptr = node->children;
+        JSONNode * ptr = node->firstChild;
         indent++;
         while (ptr != NULL) {
-            char * key = (char *)ptr->data;
-            JSONNode * value = ptr->next;
             Indent(indent);
-            printf("\"%s\": ", key);
-            JSONNodePrint(value);
-            if (ptr->next != NULL)
-                ptr = ptr->next->next;
-            else
-                ptr = NULL;
-            printf("%s\n", (ptr == NULL ? "" : ","));
+            JSONNodePrint(ptr, currNode);
+            ptr = ptr->next;
+
+            if (ptr != NULL) {
+                printf(": ");
+                JSONNodePrint(ptr, currNode);
+                if (ptr->next != NULL)
+                    printf(",");
+                ptr = ptr->next;
+            }
+            printf("\n");
         }
         indent--;
         Indent(indent);
         printf("}");
         break;
     }
+    case JSONNodeKind_Arr: {
+        printf("[\n");
+        JSONNode * ptr = node->firstChild;
+        indent++;
+        while (ptr != NULL) {
+            Indent(indent);
+            JSONNodePrint(ptr, currNode);
+            if (ptr->next != NULL)
+                printf(",");
+            printf("\n");
+            ptr = ptr->next;
+        }
+        indent--;
+        Indent(indent);
+        printf("]");
+        break;
+    }
     }
 }
 
 
 // Input
 
-JSONNode * g_Node;
+JSONNode * g_DrawNode = NULL;
+JSONNode * g_CurrNode = NULL;
 
 void
-Draw(JSONNode * node, const char * str) {
+Draw(void) {
     vt100ClearScreen();
     vt100CursorHome();
     
-    printf("> %s\n\n", str);
-
-    if (node != NULL)
-        JSONNodePrint(node);
+    if (g_DrawNode != NULL) {
+        JSONNodePrint(g_DrawNode, g_CurrNode);
+        vt100RestoreCursor();
+    }
+}
 
-    vt100CursorPos(0, strlen(str) + 3);
+int
+GetChar() {
+    Draw();
+    int c = getch();
+    return c;
 }
 
-char *
-GetStr() {
-    char * str = NEWARR(char, 16);
-    int strLen = 0;
-    int c;
-    while ((c = getch()), (c != '\r') && (c != '\n')) {
-        if (strLen < 16 - 1) {
-            str[strLen++] = c;
-            str[strLen] = '\0';
-            Draw(g_Node, str);
-        }
-    }
-    return str;
+int
+PeekChar() {
+    Draw();
+    int c = peekch();
+    return c;
 }
 
+typedef bool(*CharPredicateFunc)(char, int);
+
+bool predStr(char c, int i) { return c >= 'a' && c <= 'z'; }
+bool predInt(char c, int i) { return c >= '0' && c <= '9'; }
+
 JSONNode *
-GetNode(JSONNode * parent) {
-    int c = getch();
+GetNode() {
+    JSONNode * result = NULL;
+    JSONNode * node = NULL;
+    int c;
+    int strLen = 0;
 
-    JSONNode * result = JSONNodeNewNul();
-    
-    if (parent == NULL)
-        g_Node = result;
-
-    if (parent != NULL && result != NULL)
-        JSONNodeAppend(parent, result);
-
-    switch (c) {
-    case 's': {
-        result->kind = JSONNodeKind_Str;
-        Draw(g_Node, "");
-        result->data = (size_t)GetStr();
-        Draw(g_Node, "");
-        break;
-    }
-    case 'o': {
-        result->kind = JSONNodeKind_Obj;
-        Draw(g_Node, "");
-        while ((c = peekch()), (c != '\r') && (c != '\n')) {
-            Draw(g_Node, "");
+    bool editingNode = false;
+
+    while (true) {
+        c = GetChar();
+
+        if (c == 3)
+            break;
 
-            JSONNodeAppend(result, JSONNodeNewStr(GetStr()));
-            Draw(g_Node, "");
+        if (isNewline(c)) {
+            if (node == NULL || node->parent == NULL)
+                break;
 
-            JSONNodeAppend(result, GetNode(result));
-            Draw(g_Node, "");
+            editingNode = false;
+            g_CurrNode = node = node->parent;
+            
+            continue;
+        }
+
+        if (! editingNode) {
+            JSONNode * old = node;
+
+            /**/ if (c == 'i') { node = JSONNodeNew(JSONNodeKind_Int); editingNode = true; }
+            else if (c == 's') { node = JSONNodeNew(JSONNodeKind_Str); editingNode = true; }
+            else if (c == 'o') { node = JSONNodeNew(JSONNodeKind_Obj); }
+            else if (c == 'a') { node = JSONNodeNew(JSONNodeKind_Arr); }
+            else if (isBackspace(c) && node != NULL) {
+                g_CurrNode = node = JSONNodeRemove(node);
+                continue;
+            }
+            else if (c == 'h') { if (node->prev != NULL) g_CurrNode = node = node->prev; continue; }
+            else if (c == 'l') { if (node->next != NULL) g_CurrNode = node = node->next; continue; }
+            else if (c == 'k') { if (node->parent != NULL) g_CurrNode = node = node->parent; continue; }
+            else if (c == 'j') { if (node->firstChild != NULL) g_CurrNode = node = node->firstChild; continue; }
+            else { continue; }
+
+            g_CurrNode = node;
+
+            if (old != NULL)
+                JSONNodePush(old, node);
+            else
+                g_DrawNode = result = node;
+        }
+        else {
+            if (node->data == (size_t)NULL) {
+                node->data = (size_t)NEWARR(char, 16);
+                strLen = 0;
+            }
+            char * str = (char *)node->data;
+
+            if (isBackspace(c)) {
+                str[strLen-1] = '\0';
+                strLen--;
+            }
+            else if (strLen < 16 - 1) {
+                str[strLen] = c;
+                str[strLen+1] = '\0';
+                strLen++;
+            }
         }
-        getch();
-    }
     }
 
     return result;
 }
 
-JSONNode *
-TestNode() {
-    JSONNode * n = JSONNodeNewObj();
-    JSONNode * k1 = JSONNodeNewStr("key 1");
-    JSONNode * v1 = JSONNodeNewObj();
-    JSONNode * k11 = JSONNodeNewStr("key 11");
-    JSONNode * v11 = JSONNodeNewStr("val 11");
-    JSONNode * k12 = JSONNodeNewStr("key 12");
-    JSONNode * v12 = JSONNodeNewStr("val 12");
-    JSONNode * k2 = JSONNodeNewStr("key 2");
-    JSONNode * v2 = JSONNodeNewStr("val 2");
-
-    JSONNodeAppend(n, k1);
-    JSONNodeAppend(n, v1);
-    JSONNodeAppend(n, k2);
-    JSONNodeAppend(n, v2);
-
-    JSONNodeAppend(v1, k11);
-    JSONNodeAppend(v1, v11);
-    JSONNodeAppend(v1, k12);
-    JSONNodeAppend(v1, v12);
-
-    return n;
-}
+
+
 
 int main() {
-    Draw(NULL, "");
+    vt100EnableAlternateBuffer();
 
-    JSONNode * n = GetNode(NULL);
-    //JSONNode * n = TestNode();
+    JSONNode * n = GetNode();
+    
+    vt100DisableAlternateBuffer();
 
-    vt100ClearScreen();
-    vt100CursorHome();
-    JSONNodePrint(n);
+    JSONNodePrint(n, NULL);
 
     // JSONFree(n);
 
     return 0;
-}
\ No newline at end of file
+}