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-rw-r--r--mdk-stage1/newt/textbox.c409
1 files changed, 409 insertions, 0 deletions
diff --git a/mdk-stage1/newt/textbox.c b/mdk-stage1/newt/textbox.c
new file mode 100644
index 000000000..8eb4ae4db
--- /dev/null
+++ b/mdk-stage1/newt/textbox.c
@@ -0,0 +1,409 @@
+#include <ctype.h>
+#include <slang.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "newt.h"
+#include "newt_pr.h"
+
+struct textbox {
+ char ** lines;
+ int numLines;
+ int linesAlloced;
+ int doWrap;
+ newtComponent sb;
+ int topLine;
+ int textWidth;
+};
+
+static char * expandTabs(const char * text);
+static void textboxDraw(newtComponent co);
+static void addLine(newtComponent co, const char * s, int len);
+static void doReflow(const char * text, char ** resultPtr, int width,
+ int * badness, int * heightPtr);
+static struct eventResult textboxEvent(newtComponent c,
+ struct event ev);
+static void textboxDestroy(newtComponent co);
+static void textboxPlace(newtComponent co, int newLeft, int newTop);
+static void textboxMapped(newtComponent co, int isMapped);
+
+static struct componentOps textboxOps = {
+ textboxDraw,
+ textboxEvent,
+ textboxDestroy,
+ textboxPlace,
+ textboxMapped,
+} ;
+
+static void textboxMapped(newtComponent co, int isMapped) {
+ struct textbox * tb = co->data;
+
+ co->isMapped = isMapped;
+ if (tb->sb)
+ tb->sb->ops->mapped(tb->sb, isMapped);
+}
+
+static void textboxPlace(newtComponent co, int newLeft, int newTop) {
+ struct textbox * tb = co->data;
+
+ co->top = newTop;
+ co->left = newLeft;
+
+ if (tb->sb)
+ tb->sb->ops->place(tb->sb, co->left + co->width - 1, co->top);
+}
+
+void newtTextboxSetHeight(newtComponent co, int height) {
+ co->height = height;
+}
+
+int newtTextboxGetNumLines(newtComponent co) {
+ struct textbox * tb = co->data;
+
+ return (tb->numLines);
+}
+
+newtComponent newtTextboxReflowed(int left, int top, char * text, int width,
+ int flexDown, int flexUp, int flags __attribute__ ((unused))) {
+ newtComponent co;
+ char * reflowedText;
+ int actWidth, actHeight;
+
+ reflowedText = newtReflowText(text, width, flexDown, flexUp,
+ &actWidth, &actHeight);
+
+ co = newtTextbox(left, top, actWidth, actHeight, NEWT_FLAG_WRAP);
+ newtTextboxSetText(co, reflowedText);
+ free(reflowedText);
+
+ return co;
+}
+
+newtComponent newtTextbox(int left, int top, int width, int height, int flags) {
+ newtComponent co;
+ struct textbox * tb;
+
+ co = malloc(sizeof(*co));
+ tb = malloc(sizeof(*tb));
+ co->data = tb;
+
+ co->ops = &textboxOps;
+
+ co->height = height;
+ co->top = top;
+ co->left = left;
+ co->takesFocus = 0;
+ co->width = width;
+
+ tb->doWrap = flags & NEWT_FLAG_WRAP;
+ tb->numLines = 0;
+ tb->linesAlloced = 0;
+ tb->lines = NULL;
+ tb->topLine = 0;
+ tb->textWidth = width;
+
+ if (flags & NEWT_FLAG_SCROLL) {
+ co->width += 2;
+ tb->sb = newtVerticalScrollbar(co->left + co->width - 1, co->top,
+ co->height, COLORSET_TEXTBOX, COLORSET_TEXTBOX);
+ } else {
+ tb->sb = NULL;
+ }
+
+ return co;
+}
+
+static char * expandTabs(const char * text) {
+ int bufAlloced = strlen(text) + 40;
+ char * buf, * dest;
+ const char * src;
+ int bufUsed = 0;
+ int linePos = 0;
+ int i;
+
+ buf = malloc(bufAlloced + 1);
+ for (src = text, dest = buf; *src; src++) {
+ if ((bufUsed + 10) > bufAlloced) {
+ bufAlloced += strlen(text) / 2;
+ buf = realloc(buf, bufAlloced + 1);
+ dest = buf + bufUsed;
+ }
+ if (*src == '\t') {
+ i = 8 - (linePos & 8);
+ memset(dest, ' ', i);
+ dest += i, bufUsed += i, linePos += i;
+ } else {
+ if (*src == '\n')
+ linePos = 0;
+ else
+ linePos++;
+
+ *dest++ = *src;
+ bufUsed++;
+ }
+ }
+
+ *dest = '\0';
+ return buf;
+}
+
+#define iseuckanji(c) (0xa1 <= (unsigned char)(c&0xff) && (unsigned char)(c&0xff) <= 0xfe)
+
+static void doReflow(const char * text, char ** resultPtr, int width,
+ int * badness, int * heightPtr) {
+ char * result = NULL;
+ const char * chptr, * end;
+ int i;
+ int howbad = 0;
+ int height = 0;
+ int kanji = 0;
+
+ if (resultPtr) {
+ /* XXX I think this will work */
+ result = malloc(strlen(text) + (strlen(text) / width) + 50);
+ *result = '\0';
+ }
+
+ while (*text) {
+ kanji = 0;
+ end = strchr(text, '\n');
+ if (!end)
+ end = text + strlen(text);
+
+ while (*text && text < end) {
+ if (end - text < width) {
+ if (result) {
+ strncat(result, text, end - text);
+ strcat(result, "\n");
+ height++;
+ }
+
+ if (end - text < (width / 2))
+ howbad += ((width / 2) - (end - text)) / 2;
+ text = end;
+ if (*text) text++;
+ } else {
+ chptr = text;
+ kanji = 0;
+ for ( i = 0; i < width - 1; i++ ) {
+ if ( !iseuckanji(*chptr)) {
+ kanji = 0;
+ } else if ( kanji == 1 ) {
+ kanji = 2;
+ } else {
+ kanji = 1;
+ }
+ chptr++;
+ }
+ if (kanji == 0) {
+ while (chptr > text && !isspace(*chptr)) chptr--;
+ while (chptr > text && isspace(*chptr)) chptr--;
+ chptr++;
+ }
+
+ if (chptr-text == 1 && !isspace(*chptr))
+ chptr = text + width - 1;
+
+ if (chptr > text)
+ howbad += width - (chptr - text) + 1;
+ if (result) {
+ if (kanji == 1) {
+ strncat(result, text, chptr - text + 1);
+ chptr++;
+ kanji = 0;
+ } else {
+ strncat(result, text, chptr - text);
+ }
+ strcat(result, "\n");
+ height++;
+ }
+
+ if (isspace(*chptr))
+ text = chptr + 1;
+ else
+ text = chptr;
+ while (isspace(*text)) text++;
+ }
+ }
+ }
+
+// if (result) printf("result: %s\n", result);
+
+ if (badness) *badness = howbad;
+ if (resultPtr) *resultPtr = result;
+ if (heightPtr) *heightPtr = height;
+}
+
+char * newtReflowText(char * text, int width, int flexDown, int flexUp,
+ int * actualWidth, int * actualHeight) {
+ int min, max;
+ int i;
+ char * result;
+ int minbad, minbadwidth, howbad;
+ char * expandedText;
+
+ expandedText = expandTabs(text);
+
+ if (flexDown || flexUp) {
+ min = width - flexDown;
+ max = width + flexUp;
+
+ minbad = -1;
+ minbadwidth = width;
+
+ for (i = min; i <= max; i++) {
+ doReflow(expandedText, NULL, i, &howbad, NULL);
+
+ if (minbad == -1 || howbad < minbad) {
+ minbad = howbad;
+ minbadwidth = i;
+ }
+ }
+
+ width = minbadwidth;
+ }
+
+ doReflow(expandedText, &result, width, NULL, actualHeight);
+ free(expandedText);
+ if (actualWidth) *actualWidth = width;
+ return result;
+}
+
+void newtTextboxSetText(newtComponent co, const char * text) {
+ const char * start, * end;
+ struct textbox * tb = co->data;
+ char * reflowed, * expanded;
+ int badness, height;
+
+ if (tb->lines) {
+ free(tb->lines);
+ tb->linesAlloced = tb->numLines = 0;
+ }
+
+ expanded = expandTabs(text);
+
+ if (tb->doWrap) {
+ doReflow(expanded, &reflowed, tb->textWidth, &badness, &height);
+ free(expanded);
+ expanded = reflowed;
+ }
+
+ for (start = expanded; *start; start++)
+ if (*start == '\n') tb->linesAlloced++;
+
+ /* This ++ leaves room for an ending line w/o a \n */
+ tb->linesAlloced++;
+ tb->lines = malloc(sizeof(char *) * tb->linesAlloced);
+
+ start = expanded;
+ while ((end = strchr(start, '\n'))) {
+ addLine(co, start, end - start);
+ start = end + 1;
+ }
+
+ if (*start)
+ addLine(co, start, strlen(start));
+
+ free(expanded);
+}
+
+/* This assumes the buffer is allocated properly! */
+static void addLine(newtComponent co, const char * s, int len) {
+ struct textbox * tb = co->data;
+
+ if (len > tb->textWidth) len = tb->textWidth;
+
+ tb->lines[tb->numLines] = malloc(tb->textWidth + 1);
+ memset(tb->lines[tb->numLines], ' ', tb->textWidth);
+ memcpy(tb->lines[tb->numLines], s, len);
+ tb->lines[tb->numLines++][tb->textWidth] = '\0';
+}
+
+static void textboxDraw(newtComponent c) {
+ int i;
+ struct textbox * tb = c->data;
+ int size;
+
+ if (tb->sb) {
+ size = tb->numLines - c->height;
+ newtScrollbarSet(tb->sb, tb->topLine, size ? size : 0);
+ tb->sb->ops->draw(tb->sb);
+ }
+
+ SLsmg_set_color(NEWT_COLORSET_TEXTBOX);
+
+ for (i = 0; (i + tb->topLine) < tb->numLines && i < c->height; i++) {
+ newtGotorc(c->top + i, c->left);
+ SLsmg_write_string(tb->lines[i + tb->topLine]);
+ }
+}
+
+static struct eventResult textboxEvent(newtComponent co,
+ struct event ev) {
+ struct textbox * tb = co->data;
+ struct eventResult er;
+
+ er.result = ER_IGNORED;
+
+ if (ev.when == EV_EARLY && ev.event == EV_KEYPRESS && tb->sb) {
+ switch (ev.u.key) {
+ case NEWT_KEY_UP:
+ if (tb->topLine) tb->topLine--;
+ textboxDraw(co);
+ er.result = ER_SWALLOWED;
+ break;
+
+ case NEWT_KEY_DOWN:
+ if (tb->topLine < (tb->numLines - co->height)) tb->topLine++;
+ textboxDraw(co);
+ er.result = ER_SWALLOWED;
+ break;
+
+ case NEWT_KEY_PGDN:
+ tb->topLine += co->height;
+ if (tb->topLine > (tb->numLines - co->height)) {
+ tb->topLine = tb->numLines - co->height;
+ if (tb->topLine < 0) tb->topLine = 0;
+ }
+ textboxDraw(co);
+ er.result = ER_SWALLOWED;
+ break;
+
+ case NEWT_KEY_PGUP:
+ tb->topLine -= co->height;
+ if (tb->topLine < 0) tb->topLine = 0;
+ textboxDraw(co);
+ er.result = ER_SWALLOWED;
+ break;
+ }
+ }
+ if (ev.when == EV_EARLY && ev.event == EV_MOUSE && tb->sb) {
+ /* Top scroll arrow */
+ if (ev.u.mouse.x == co->width && ev.u.mouse.y == co->top) {
+ if (tb->topLine) tb->topLine--;
+ textboxDraw(co);
+
+ er.result = ER_SWALLOWED;
+ }
+ /* Bottom scroll arrow */
+ if (ev.u.mouse.x == co->width &&
+ ev.u.mouse.y == co->top + co->height - 1) {
+ if (tb->topLine < (tb->numLines - co->height)) tb->topLine++;
+ textboxDraw(co);
+
+ er.result = ER_SWALLOWED;
+ }
+ }
+ return er;
+}
+
+static void textboxDestroy(newtComponent co) {
+ int i;
+ struct textbox * tb = co->data;
+
+ for (i = 0; i < tb->numLines; i++)
+ free(tb->lines[i]);
+ free(tb->lines);
+ free(tb);
+ free(co);
+}
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