leftrightmousewheel.patch

   1 Subject: scroll left/right with mouse wheel
   2
   3 Adds a units option for the scroll_left()/scroll_right() action routines:
   4
   5  * "chars"
   6  * "tabs"
   7  * "emtabs"
   8  * "pixels"
   9
  10 ---
  11
  12  doc/help.etx  |   22 +++++++++++++---------
  13  source/text.c |   46 +++++++++++++++++++++++++++++++++++++++++++++-
  14  util/misc.c   |   47 ++++++++++++++++++++++++++++++++++++++++++++++-
  15  3 files changed, 104 insertions(+), 11 deletions(-)
  16
  17 diff --quilt old/source/text.c new/source/text.c
  18 --- old/source/text.c
  19 +++ new/source/text.c
  20 @@ -428,6 +428,12 @@ static char defaultTranslations[] =
  21      "<FocusIn>: focusIn()\n"
  22      "<FocusOut>: focusOut()\n"
  23      /* Support for mouse wheel in XFree86 */
  24 +    "Shift Alt<Btn4Down>,<Btn4Up>: scroll_left(1)\n"
  25 +    "Shift Alt<Btn5Down>,<Btn5Up>: scroll_right(1)\n"
  26 +    "Ctrl Alt<Btn4Down>,<Btn4Up>: scroll_left(1, tab)\n"
  27 +    "Ctrl Alt<Btn5Down>,<Btn5Up>: scroll_right(1, tab)\n"
  28 +    "Alt<Btn4Down>,<Btn4Up>: scroll_left(1, char)\n"
  29 +    "Alt<Btn5Down>,<Btn5Up>: scroll_right(1, char)\n"
  30      "Shift<Btn4Down>,<Btn4Up>: scroll_up(1)\n"
  31      "Shift<Btn5Down>,<Btn5Up>: scroll_down(1)\n"
  32      "Ctrl<Btn4Down>,<Btn4Up>: scroll_up(1, pages)\n"
  33 @@ -3401,8 +3407,27 @@ static void scrollLeftAP(Widget w, XEven
  34
  35      if (*nArgs == 0 || sscanf(args[0], "%d", &nPixels) != 1)
  36         return;
  37 +
  38 +    if (*nArgs == 2) {
  39 +        if (strncmp(args[1], "char", 4) == 0) {
  40 +            nPixels *= TextDMinFontWidth(textD, True);
  41 +        }
  42 +        else if (strncmp(args[1], "tab", 3) == 0) {
  43 +            nPixels *= TextDMinFontWidth(textD, True) * textD->buffer->tabDist;
  44 +        }
  45 +        else if (strncmp(args[1], "emtab", 5) == 0) {
  46 +           int tabDist = ((TextWidget)w)->text.emulateTabs;
  47 +            if (tabDist <= 0)
  48 +                tabDist = textD->buffer->tabDist;
  49 +            nPixels *= TextDMinFontWidth(textD, True) * tabDist;
  50 +        }
  51 +        else if (strncmp(args[1], "pixel", 5) != 0) {
  52 +            return;
  53 +        }
  54 +    }
  55 +
  56      XtVaGetValues(textD->hScrollBar, XmNmaximum, &sliderMax,
  57 -       XmNsliderSize, &sliderSize, NULL);
  58 +           XmNsliderSize, &sliderSize, NULL);
  59      horizOffset = min(max(0, textD->horizOffset - nPixels), sliderMax - sliderSize);
  60      if (textD->horizOffset != horizOffset) {
  61         TextDSetScroll(textD, textD->topLineNum, horizOffset);
  62 @@ -3418,6 +3443,25 @@ static void scrollRightAP(Widget w, XEve
  63
  64      if (*nArgs == 0 || sscanf(args[0], "%d", &nPixels) != 1)
  65         return;
  66 +
  67 +    if (*nArgs == 2) {
  68 +        if (strncmp(args[1], "char", 4) == 0) {
  69 +            nPixels *= TextDMinFontWidth(textD, True);
  70 +        }
  71 +        else if (strncmp(args[1], "tab", 3) == 0) {
  72 +            nPixels *= TextDMinFontWidth(textD, True) * textD->buffer->tabDist;
  73 +        }
  74 +        else if (strncmp(args[1], "emtab", 5) == 0) {
  75 +            int tabDist = ((TextWidget)w)->text.emulateTabs;
  76 +            if (tabDist <= 0)
  77 +                tabDist = textD->buffer->tabDist;
  78 +            nPixels *= TextDMinFontWidth(textD, True) * tabDist;
  79 +        }
  80 +        else if (strncmp(args[1], "pixel", 5) != 0) {
  81 +            return;
  82 +        }
  83 +    }
  84 +
  85      XtVaGetValues(textD->hScrollBar, XmNmaximum, &sliderMax,
  86             XmNsliderSize, &sliderSize, NULL);
  87      horizOffset = min(max(0, textD->horizOffset + nPixels), sliderMax - sliderSize);
  88 diff --quilt old/util/misc.c new/util/misc.c
  89 --- old/util/misc.c
  90 +++ new/util/misc.c
  91 @@ -156,6 +156,10 @@ static void pageDownAP(Widget w, XEvent
  92         Cardinal *nArgs);
  93  static void pageUpAP(Widget w, XEvent *event, String *args,
  94         Cardinal *nArgs);
  95 +static void scrollLeftAP(Widget w, XEvent *event, String *args,
  96 +       Cardinal *nArgs);
  97 +static void scrollRightAP(Widget w, XEvent *event, String *args,
  98 +       Cardinal *nArgs);
  99  static long queryDesktop(Display *display, Window window, Atom deskTopAtom);
 100  static void warning(const char* mesg);
 101  static void microsleep(long usecs);
 102 @@ -1929,7 +1933,9 @@ void InstallMouseWheelActions(XtAppConte
 103         {"scrolled-window-scroll-up",   scrollUpAP},
 104         {"scrolled-window-page-up",     pageUpAP},
 105         {"scrolled-window-scroll-down", scrollDownAP},
 106 -       {"scrolled-window-page-down",   pageDownAP}
 107 +       {"scrolled-window-page-down",   pageDownAP},
 108 +       {"scrolled-window-scroll-left",  scrollLeftAP},
 109 +       {"scrolled-window-scroll-right", scrollRightAP}
 110      };
 111
 112      XtAppAddActions(context, Actions, XtNumber(Actions));
 113 @@ -1944,6 +1950,12 @@ void AddMouseWheelSupport(Widget w)
 114      if (XmIsScrolledWindow(XtParent(w)))
 115      {
 116          static const char scrollTranslations[] =
 117 +           "Shift Alt<Btn4Down>,<Btn4Up>: scrolled-window-scroll-left(1)\n"
 118 +           "Shift Alt<Btn5Down>,<Btn5Up>: scrolled-window-scroll-right(1)\n"
 119 +           "Ctrl Alt<Btn4Down>,<Btn4Up>:  scrolled-window-scroll-left(8)\n"
 120 +           "Ctrl Alt<Btn5Down>,<Btn5Up>:  scrolled-window-scroll-right(8)\n"
 121 +           "Alt<Btn4Down>,<Btn4Up>:       scrolled-window-scroll-left(4)\n"
 122 +           "Alt<Btn5Down>,<Btn5Up>:       scrolled-window-scroll-right(4)\n"
 123             "Shift<Btn4Down>,<Btn4Up>: scrolled-window-scroll-up(1)\n"
 124             "Shift<Btn5Down>,<Btn5Up>: scrolled-window-scroll-down(1)\n"
 125             "Ctrl<Btn4Down>,<Btn4Up>:  scrolled-window-page-up()\n"
 126 @@ -2020,6 +2032,39 @@ static void scrollDownAP(Widget w, XEven
 127      return;
 128  }
 129
 130 +static void scrollLeftAP(Widget w, XEvent *event, String *args, Cardinal *nArgs)
 131 +{
 132 +    Widget scrolledWindow, scrollBar;
 133 +    String al[1];
 134 +    int i, nLines;
 135 +
 136 +    if (*nArgs == 0 || sscanf(args[0], "%d", &nLines) != 1)
 137 +       return;
 138 +    al[0] = "Left";
 139 +    scrolledWindow = XtParent(w);
 140 +    scrollBar = XtNameToWidget (scrolledWindow, "HorScrollBar");
 141 +    if (scrollBar)
 142 +        for (i=0; i<nLines; i++)
 143 +            XtCallActionProc(scrollBar, "IncrementUpOrLeft", event, al, 1) ;
 144 +    return;
 145 +}
 146 +
 147 +static void scrollRightAP(Widget w, XEvent *event, String *args, Cardinal *nArgs)
 148 +{
 149 +    Widget scrolledWindow, scrollBar;
 150 +    String al[1];
 151 +    int i, nLines;
 152 +
 153 +    if (*nArgs == 0 || sscanf(args[0], "%d", &nLines) != 1)
 154 +       return;
 155 +    al[0] = "Right";
 156 +    scrolledWindow = XtParent(w);
 157 +    scrollBar = XtNameToWidget (scrolledWindow, "HorScrollBar");
 158 +    if (scrollBar)
 159 +        for (i=0; i<nLines; i++)
 160 +            XtCallActionProc(scrollBar, "IncrementDownOrRight", event, al, 1) ;
 161 +    return;
 162 +}
 163
 164  /*
 165  ** This is a disguisting hack to work around a bug in OpenMotif.
 166 diff --quilt old/doc/help.etx new/doc/help.etx
 167 --- old/doc/help.etx
 168 +++ new/doc/help.etx
 169 @@ -2503,7 +2503,7 @@ Macro Subroutines
 170    Width of the current pane in pixels.
 171
 172  **$em_tab_dist**
 173 -  If tab emulation is turned on in the Tabs...
 174 +  If tab emulation is turned on in the Tab Stops...
 175    dialog of the Preferences menu, the value is the
 176    distance between emulated tab stops. If tab
 177    emulation is turned off, the value is 0.
 178 @@ -2622,7 +2622,7 @@ Macro Subroutines
 179  **$tab_dist**
 180    The distance between tab stops for a
 181    hardware tab character, as set in the
 182 -  Tabs... dialog of the Preferences menu.
 183 +  Tab Stops... dialog of the Preferences menu.
 184
 185  **$text_length**
 186    The length of the text in the current document.
 187 @@ -2633,8 +2633,8 @@ Macro Subroutines
 188  **$use_tabs**
 189    Whether the user is allowing the NEdit to insert tab characters to maintain
 190    spacing in tab emulation and rectangular dragging operations. (The setting of
 191 -  the "Use tab characters in padding and emulated tabs" button in the Tabs...
 192 -  dialog of the Preferences menu.)
 193 +  the "Use tab characters in padding and emulated tabs" button in the
 194 +  Tab Stops... dialog of the Preferences menu.)
 195
 196  **$wrap_margin**
 197    The right margin in the current window for text wrapping and filling.
 198 @@ -3783,11 +3783,15 @@ Action Routines
 199    Scroll the display down (towards the end of the file) by a given
 200    number of units, units being lines or pages. Default units are lines.
 201
 202 -**scroll_left( nPixels )**
 203 -  Scroll the display left by nPixels.
 204 -
 205 -**scroll_right( nPixels )**
 206 -  Scroll the display right by nPixels.
 207 +**scroll_left( nUnits, ["chars" | "tabs" | "emtabs" | "pixels"] )**
 208 +  Scroll the display left by a given number of units, units being characters,
 209 +  hardware tab stop spacing, emulated tab stop spacing, or pixels. If emulated
 210 +  tabs are disabled in the Tab Stops... dialog, "emtabs" is the same as "tabs".
 211 +
 212 +**scroll_right( nUnits, ["chars" | "tabs" | "emtabs" | "pixels"] )**
 213 +  Scroll the display right by a given number of units, units being characters,
 214 +  hardware tab stop spacing, emulated tab stop spacing, or pixels. If emulated
 215 +  tabs are disabled in the Tab Stops... dialog, "emtabs" is the same as "tabs".
 216
 217  **scroll_up( nUnits, ["lines" | "pages"] )**
 218    Scroll the display up (towards the beginning of the file) by a given