From e5fa60b6f5fbc79c13ac98f53911f1e34d6cee18 Mon Sep 17 00:00:00 2001
From: Jaakko Keränen <jaakko.keranen@iki.fi>
Date: Sat, 27 Mar 2021 15:13:55 +0200
Subject: InputWidget: Select by word

IssueID #134
---
 src/ui/inputwidget.c | 47 ++++++++++++++++++++++++++++++++++++++++++-----
 src/ui/util.c        |  6 +++---
 src/ui/util.h        |  4 +++-
 3 files changed, 48 insertions(+), 9 deletions(-)

(limited to 'src')

diff --git a/src/ui/inputwidget.c b/src/ui/inputwidget.c
index 12bef08b..5593b5b9 100644
--- a/src/ui/inputwidget.c
+++ b/src/ui/inputwidget.c
@@ -73,6 +73,7 @@ enum iInputWidgetFlag {
     notifyEdits_InputWidgetFlag      = iBit(5),
     eatEscape_InputWidgetFlag        = iBit(6),
     isMarking_InputWidgetFlag        = iBit(7),
+    markWords_InputWidgetFlag        = iBit(8),
 };
 
 struct Impl_InputWidget {
@@ -89,6 +90,7 @@ struct Impl_InputWidget {
     size_t          cursor;
     size_t          lastCursor;
     iRanges         mark;
+    iRanges         initialMark;
     iArray          undoStack;
     int             font;
     iClick          click;
@@ -664,6 +666,27 @@ static void paste_InputWidget_(iInputWidget *d) {
     }
 }
 
+static iChar at_InputWidget_(const iInputWidget *d, size_t pos) {
+    return *(const iChar *) constAt_Array(&d->text, pos);
+}
+
+static void extendRange_InputWidget_(iInputWidget *d, size_t *pos, int dir) {
+    const size_t textLen = size_Array(&d->text);
+    if (dir < 0 && *pos > 0) {
+        for ((*pos)--; *pos > 0; (*pos)--) {
+            if (isSelectionBreaking_Char(at_InputWidget_(d, *pos))) {
+                (*pos)++;
+                break;
+            }
+        }
+    }
+    if (dir > 0) {
+        for (; *pos < textLen && !isSelectionBreaking_Char(at_InputWidget_(d, *pos)); (*pos)++) {
+            /* continue */
+        }
+    }
+}
+
 static iBool processEvent_InputWidget_(iInputWidget *d, const SDL_Event *ev) {
     iWidget *w = as_Widget(d);
     if (isCommand_Widget(w, ev, "focus.gained")) {
@@ -733,7 +756,19 @@ static iBool processEvent_InputWidget_(iInputWidget *d, const SDL_Event *ev) {
             setFocus_Widget(w);
             setCursor_InputWidget(d, coordIndex_InputWidget_(d, pos_Click(&d->click)));
             iZap(d->mark);
-            d->inFlags &= ~isMarking_InputWidgetFlag;
+            iZap(d->initialMark);
+            d->inFlags &= ~(isMarking_InputWidgetFlag | markWords_InputWidgetFlag);
+            if (d->click.count == 2) {
+                d->inFlags |= isMarking_InputWidgetFlag | markWords_InputWidgetFlag;
+                d->mark.start = d->mark.end = d->cursor;
+                extendRange_InputWidget_(d, &d->mark.start, -1);
+                extendRange_InputWidget_(d, &d->mark.end, +1);
+                d->initialMark = d->mark;
+                refresh_Widget(w);
+            }
+            if (d->click.count == 3) {
+                selectAll_InputWidget(d);
+            }
             return iTrue;
         case aborted_ClickResult:
             d->inFlags &= ~isMarking_InputWidgetFlag;
@@ -746,13 +781,15 @@ static iBool processEvent_InputWidget_(iInputWidget *d, const SDL_Event *ev) {
                 d->mark.start = d->cursor;
             }
             d->mark.end = d->cursor;
+            if (d->inFlags & markWords_InputWidgetFlag) {
+                const iBool isFwd = d->mark.end >= d->mark.start;
+                extendRange_InputWidget_(d, &d->mark.end, isFwd ? +1 : -1);
+                d->mark.start = isFwd ? d->initialMark.start : d->initialMark.end;
+            }
             refresh_Widget(w);
             return iTrue;
         case finished_ClickResult:
-            if (d->click.count == 2) {
-                selectAll_InputWidget(d);
-                d->inFlags &= ~isMarking_InputWidgetFlag;
-            }
+            d->inFlags &= ~isMarking_InputWidgetFlag;
             return iTrue;
     }
     if (ev->type == SDL_MOUSEBUTTONDOWN && ev->button.button == SDL_BUTTON_RIGHT &&
diff --git a/src/ui/util.c b/src/ui/util.c
index 8074223b..19fba3a4 100644
--- a/src/ui/util.c
+++ b/src/ui/util.c
@@ -164,7 +164,7 @@ iRangei union_Rangei(iRangei a, iRangei b) {
     return (iRangei){ iMin(a.start, b.start), iMax(a.end, b.end) };
 }
 
-static iBool isSelectionBreakingChar_(iChar c) {
+iBool isSelectionBreaking_Char(iChar c) {
     return isSpace_Char(c) || (c == '@' || c == '-' || c == '/' || c == '\\' || c == ',');
 }
 
@@ -173,7 +173,7 @@ static const char *moveBackward_(const char *pos, iRangecc bounds, int mode) {
     while (pos > bounds.start) {
         int len = decodePrecedingBytes_MultibyteChar(pos, bounds.start, &ch);
         if (len > 0) {
-            if (mode & word_RangeExtension && isSelectionBreakingChar_(ch)) break;
+            if (mode & word_RangeExtension && isSelectionBreaking_Char(ch)) break;
             if (mode & line_RangeExtension && ch == '\n') break;
             pos -= len;
         }
@@ -187,7 +187,7 @@ static const char *moveForward_(const char *pos, iRangecc bounds, int mode) {
     while (pos < bounds.end) {
         int len = decodeBytes_MultibyteChar(pos, bounds.end, &ch);
         if (len > 0) {
-            if (mode & word_RangeExtension && isSelectionBreakingChar_(ch)) break;
+            if (mode & word_RangeExtension && isSelectionBreaking_Char(ch)) break;
             if (mode & line_RangeExtension && ch == '\n') break;
             pos += len;
         }
diff --git a/src/ui/util.h b/src/ui/util.h
index 9e00e495..2be38384 100644
--- a/src/ui/util.h
+++ b/src/ui/util.h
@@ -88,7 +88,9 @@ enum iRangeExtension {
     bothStartAndEnd_RangeExtension = iBit(3),
 };
 
-void        extendRange_Rangecc (iRangecc *, iRangecc bounds, int mode);
+void        extendRange_Rangecc     (iRangecc *, iRangecc bounds, int mode);
+
+iBool       isSelectionBreaking_Char(iChar);
 
 /*-----------------------------------------------------------------------------------------------*/
 
-- 
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